CA2303885A1 - Optical system for injecting laser radiation into an optical conductor, and a method for its production - Google Patents
Optical system for injecting laser radiation into an optical conductor, and a method for its production Download PDFInfo
- Publication number
- CA2303885A1 CA2303885A1 CA002303885A CA2303885A CA2303885A1 CA 2303885 A1 CA2303885 A1 CA 2303885A1 CA 002303885 A CA002303885 A CA 002303885A CA 2303885 A CA2303885 A CA 2303885A CA 2303885 A1 CA2303885 A1 CA 2303885A1
- Authority
- CA
- Canada
- Prior art keywords
- optical system
- convex
- diaphragm
- optical
- laser radiation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/124—Geodesic lenses or integrated gratings
- G02B6/1245—Geodesic lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4206—Optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/12102—Lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
Abstract
The invention concerns an optical system for injecting laser radiation (5) emitted by a semiconductor laser emitter, into an optical fibre (3), wherein the converging lens (2) is arranged between the semiconductor laser emitter (1) and the optical fibre (3). A diaphragm (4) is applied on the converging lens (2) for stopping down part of the laser radiation (5) emitted by the semiconductor laser emitter (1).
Description
Description Optical system for injecting laser radiation into an optical conductor, and a method for its production The invention relates to an optical system as claimed in the precharacterising clause of claim 1, and to a method for producing a plurality of plano-convex convergent lenses which can be used in such an optical system.
In optical information transmission, radiation from semiconductor laser emitters, which generally emit widely divergent beams, has to be injected into optical conductors, such as optical fibers. Furthermore, the power to be injected has to be matched to the requirements of various transmissions systems and standards.
In known laser modules for information transmission technology (see, for example, DE 41 33 220), the laser emitter is followed by a spherical, biconvex or plano-convex lens, which converts the highly divergent beam into a convergent beam. In order to inject the desired radiation power into the optical conductor, said optical conductor must be adjusted in all three spatial directions. These systems thus involve a very high level of assembly effort, in particular owing to the complex adjustment in the z-direction. Furthermore, mechanical instabilities often occur in these systems.
A further disadvantageous of the known optical systems of the type mentioned initially is that additional technical means have to be used to prevent the laser radiation which is not injected into the optical conductor from emerging from the corresponding component.
European Patent Application EP 0 566 341 A1, which represents the closest prior art, describes a AMENDED SHEET
connector device for connecting a laser diode to an optical fiber. The connector device comprises a plano-convex lens arranged in the beam path on the inlet side, a diaphragm plate arranged behind the lens, and an optical connecting element provided on the light outlet side. The lens, diaphragm plate and optical connecting element are located (for reasons of mutual alignment) in a common socket, and their touching surfaces are bonded using a transparent adhesive.
The present invention is based on the object of providing an optical system of the type mentioned initially, which allows the optical device to be adjusted easily. The aim was, in particular, to provide an optical system by means of which the radiation power to be injected into the optical device (optical conductor) can be varied in a simple manner.
Furthermore, it is intended to specify a particularly simple method for producing such an optical system.
This obj ect is achieved by means of an optical system having the features of patent claim 1.
Advantageous developments are the subject matter of the dependent claims 2 to 6. One preferred use of the optical system according to the invention is the subject matter of dependent claim 7. Claim 8 specifies a preferred method for producing the optical system according to the invention.
The invention provides that the convergent lens is provided with a structured coating in the form of a diaphragm (for example a perforated or zone diaphragm) for masking out a portion of the laser radiation emitted from the semiconductor laser emitter. This is achieved by the convergent lens now passing only that portion of the laser beam emitted from the semiconductor laser emitter which is intended to be injected into the optical conductor.
AMENDED SHEET
Masking out the laser radiation with a high divergence angle advantageously improves the quality of the focusing of the convergent lens. A major advantage of the optical system according to the invention is, in particular, that the portion of the beam emitted from the semiconductor laser emitter which is in any case not injected into the optical conductor is masked out.
In consequence, receptacle components advantageously achieve the same eye safety as pigtail components.
The structured coating (diaphragm) is preferably composed of metal, which can be applied in a simple manner to the surface of the convergent lens, by means of vapor deposition. The convergent lens may be composed of glass, silicon or some other semiconductor material that passes the respective laser radiation wavelength. It is particularly preferred for the convergent lens to be a plano-convex lens, with the structured coating being provided on the convex side.
The structured coating is preferably in the form of a perforated diaphragm and masks out that portion of the laser radiation whose divergence angle is greater than the acceptance angle of the optical conductor. The radiation power injected into the optical conductor is varied by varying the divergence angle below the value of the acceptance angle, without having to change the geometrical arrangement of the entire system comprising the semiconductor laser emitter/convergent lens/optical conductor.
If the structured coating is in the form of a zone diaphragm, the high-intensity central beam is masked out. This reduces the injected power and increases the eye safety of receptacle versions.
The optical system according to the invention can advantageously be used for injecting the laser beam from a semiconductor laser emitter into a multimode fiber, in which AMENDED SHEET
only the fundamental mode is stimulated, by masking out the laser radiation having a high divergence angle. The transmission characteristics of a single-mode fiber are thus simulated in the multimode fiber.
In a preferred method for producing a plurality of plano-convex convergent lenses, a silicon wafer is produced first of all, and is provided with a plurality of convex projections on a first main surface, by means of a photographic technique and etching. After this, a metal layer is applied to the first main surface and is then once again structured by means of a photographic technique and etching in such a manner that annular perforated diaphragms, or zone diaphragms in the form of discs, remain on the convex projections. Once its second main surface, for example, has been bonded onto an adhesive film, the silicon wafer is then sliced through, for example by sawing or cutting grinding, to form individual plano-convex convergent lenses with a perforated diaphragm or zone diaphragm.
The optical system according to the invention is, of course, not limited to use for injection of laser radiation into an optical fiber. It can be used in any apparatus in which only a portion of an available laser beam is intended to be injected into an optical device.
The optical system according to the invention and the method for producing it will be explained in more detail in the following text with reference to two exemplary embodiments and in conjunction with Figures to 3 in which:
Figure 1 shows a schematic illustration of a section through the first exemplary embodiment, with the beam path, Figure 2 shows a schematic illustration of a section through the second exemplary embodiment, with the beam path, and Figure 3 shows a schematic illustration of the method for producing a plurality of optical systems as per the exemplary embodiment.
AMENDED SBEET
GR 97 P 2513 DE - 4a -In the exemplary embodiment shown in Figure 1, a convergent lens 2 in the form of a spherical or aspherical silicon plano-convex lens is arranged between a semiconductor laser emitter 1 and an optical conductor 3, in this case an optical fiber. The plano-convex lens 2 is provided on its curved surface 7 with a perforated diaphragm 4, which comprises a metallic layer 6 (for example A1). This perforated diaphragm 4 masks out an edge region of the highly divergent laser beam 5 emitted from the semiconductor laser emitter 1, allows only a center region of the laser beam 5 around its beam axis 9 to pass, and converts this into a convergent laser beam 8. Only AMENDED SHEET
this portion of the laser radiation 5 is injected into the optical fiber 3.
The perforated diaphragm is dimensioned, in particular, such that the convergence angle (or the divergence angle once again after passing through the focus) of the radiation to be injected is equal to or less than the acceptance angle of the optical fiber.
This means that the diaphragm 4 masks out that portion of the laser radiation 5 which is in any case not injected into the optical fiber 3.
The optical system shown in Figure 1 may be used for injecting laser radiation 5 into a multimode fiber as the optical conductor 3. Masking out the laser radiation having a high divergence angle then results in only the fundamental mode being stimulated. The transmission characteristics of a single-mode fiber are thus simulated in the multimode fiber.
The exemplary embodiment shown in Figure 2 differs from that in Figure 1 essentially in that a zone diaphragm 4', which is in the form of a disc and once again comprises a metallic layer 6', is provided instead of the perforated diaphragm 4. This zone diaphragm masks out the high-intensity central beam of the laser beam 5 emitted from the semiconductor laser emitter 1.
The method shown schematically in Figure 2 for producing a plurality of plano-convex convergent lenses 2, composed of silicon, in which a perforated diaphragm 4 is applied to the convex side 7, has the following method steps:
a) production of a semiconductor wafer 10, b) production of a plurality of convex projections 11 on a first main surface 12 of the silicon wafer 10 by means of a photographic technique and etching, c) application of a metal layer 13 to the entire first main surface 12, d) structuring of the metal layer 12 by means of a photographic technique and etching, in such a manner that a diaphragm 4 remains on each convex projection 11, and e) slicing through the silicon wafer 10 between the convex projections 11, along separation lines 14, tc form individual plano-convex convergence lenses 2 with a diaphragm A plurality of plano-convex convergent lenses 2 with zone diaphragms 4' are produced, for example, using an analogous method.
List of reference symbols 1 Semiconductor laser emitter 2 Convergent lens 3 Optical conductor 4 Diaphragm 5 Laser radiation 6 Vapor-deposited layer 7 Convex side 8 Convergent beam 9 Beam axis 10 Semiconductor wafer 11 Convex projection 12 Main surface 13 Metal layer 14 Separation line
In optical information transmission, radiation from semiconductor laser emitters, which generally emit widely divergent beams, has to be injected into optical conductors, such as optical fibers. Furthermore, the power to be injected has to be matched to the requirements of various transmissions systems and standards.
In known laser modules for information transmission technology (see, for example, DE 41 33 220), the laser emitter is followed by a spherical, biconvex or plano-convex lens, which converts the highly divergent beam into a convergent beam. In order to inject the desired radiation power into the optical conductor, said optical conductor must be adjusted in all three spatial directions. These systems thus involve a very high level of assembly effort, in particular owing to the complex adjustment in the z-direction. Furthermore, mechanical instabilities often occur in these systems.
A further disadvantageous of the known optical systems of the type mentioned initially is that additional technical means have to be used to prevent the laser radiation which is not injected into the optical conductor from emerging from the corresponding component.
European Patent Application EP 0 566 341 A1, which represents the closest prior art, describes a AMENDED SHEET
connector device for connecting a laser diode to an optical fiber. The connector device comprises a plano-convex lens arranged in the beam path on the inlet side, a diaphragm plate arranged behind the lens, and an optical connecting element provided on the light outlet side. The lens, diaphragm plate and optical connecting element are located (for reasons of mutual alignment) in a common socket, and their touching surfaces are bonded using a transparent adhesive.
The present invention is based on the object of providing an optical system of the type mentioned initially, which allows the optical device to be adjusted easily. The aim was, in particular, to provide an optical system by means of which the radiation power to be injected into the optical device (optical conductor) can be varied in a simple manner.
Furthermore, it is intended to specify a particularly simple method for producing such an optical system.
This obj ect is achieved by means of an optical system having the features of patent claim 1.
Advantageous developments are the subject matter of the dependent claims 2 to 6. One preferred use of the optical system according to the invention is the subject matter of dependent claim 7. Claim 8 specifies a preferred method for producing the optical system according to the invention.
The invention provides that the convergent lens is provided with a structured coating in the form of a diaphragm (for example a perforated or zone diaphragm) for masking out a portion of the laser radiation emitted from the semiconductor laser emitter. This is achieved by the convergent lens now passing only that portion of the laser beam emitted from the semiconductor laser emitter which is intended to be injected into the optical conductor.
AMENDED SHEET
Masking out the laser radiation with a high divergence angle advantageously improves the quality of the focusing of the convergent lens. A major advantage of the optical system according to the invention is, in particular, that the portion of the beam emitted from the semiconductor laser emitter which is in any case not injected into the optical conductor is masked out.
In consequence, receptacle components advantageously achieve the same eye safety as pigtail components.
The structured coating (diaphragm) is preferably composed of metal, which can be applied in a simple manner to the surface of the convergent lens, by means of vapor deposition. The convergent lens may be composed of glass, silicon or some other semiconductor material that passes the respective laser radiation wavelength. It is particularly preferred for the convergent lens to be a plano-convex lens, with the structured coating being provided on the convex side.
The structured coating is preferably in the form of a perforated diaphragm and masks out that portion of the laser radiation whose divergence angle is greater than the acceptance angle of the optical conductor. The radiation power injected into the optical conductor is varied by varying the divergence angle below the value of the acceptance angle, without having to change the geometrical arrangement of the entire system comprising the semiconductor laser emitter/convergent lens/optical conductor.
If the structured coating is in the form of a zone diaphragm, the high-intensity central beam is masked out. This reduces the injected power and increases the eye safety of receptacle versions.
The optical system according to the invention can advantageously be used for injecting the laser beam from a semiconductor laser emitter into a multimode fiber, in which AMENDED SHEET
only the fundamental mode is stimulated, by masking out the laser radiation having a high divergence angle. The transmission characteristics of a single-mode fiber are thus simulated in the multimode fiber.
In a preferred method for producing a plurality of plano-convex convergent lenses, a silicon wafer is produced first of all, and is provided with a plurality of convex projections on a first main surface, by means of a photographic technique and etching. After this, a metal layer is applied to the first main surface and is then once again structured by means of a photographic technique and etching in such a manner that annular perforated diaphragms, or zone diaphragms in the form of discs, remain on the convex projections. Once its second main surface, for example, has been bonded onto an adhesive film, the silicon wafer is then sliced through, for example by sawing or cutting grinding, to form individual plano-convex convergent lenses with a perforated diaphragm or zone diaphragm.
The optical system according to the invention is, of course, not limited to use for injection of laser radiation into an optical fiber. It can be used in any apparatus in which only a portion of an available laser beam is intended to be injected into an optical device.
The optical system according to the invention and the method for producing it will be explained in more detail in the following text with reference to two exemplary embodiments and in conjunction with Figures to 3 in which:
Figure 1 shows a schematic illustration of a section through the first exemplary embodiment, with the beam path, Figure 2 shows a schematic illustration of a section through the second exemplary embodiment, with the beam path, and Figure 3 shows a schematic illustration of the method for producing a plurality of optical systems as per the exemplary embodiment.
AMENDED SBEET
GR 97 P 2513 DE - 4a -In the exemplary embodiment shown in Figure 1, a convergent lens 2 in the form of a spherical or aspherical silicon plano-convex lens is arranged between a semiconductor laser emitter 1 and an optical conductor 3, in this case an optical fiber. The plano-convex lens 2 is provided on its curved surface 7 with a perforated diaphragm 4, which comprises a metallic layer 6 (for example A1). This perforated diaphragm 4 masks out an edge region of the highly divergent laser beam 5 emitted from the semiconductor laser emitter 1, allows only a center region of the laser beam 5 around its beam axis 9 to pass, and converts this into a convergent laser beam 8. Only AMENDED SHEET
this portion of the laser radiation 5 is injected into the optical fiber 3.
The perforated diaphragm is dimensioned, in particular, such that the convergence angle (or the divergence angle once again after passing through the focus) of the radiation to be injected is equal to or less than the acceptance angle of the optical fiber.
This means that the diaphragm 4 masks out that portion of the laser radiation 5 which is in any case not injected into the optical fiber 3.
The optical system shown in Figure 1 may be used for injecting laser radiation 5 into a multimode fiber as the optical conductor 3. Masking out the laser radiation having a high divergence angle then results in only the fundamental mode being stimulated. The transmission characteristics of a single-mode fiber are thus simulated in the multimode fiber.
The exemplary embodiment shown in Figure 2 differs from that in Figure 1 essentially in that a zone diaphragm 4', which is in the form of a disc and once again comprises a metallic layer 6', is provided instead of the perforated diaphragm 4. This zone diaphragm masks out the high-intensity central beam of the laser beam 5 emitted from the semiconductor laser emitter 1.
The method shown schematically in Figure 2 for producing a plurality of plano-convex convergent lenses 2, composed of silicon, in which a perforated diaphragm 4 is applied to the convex side 7, has the following method steps:
a) production of a semiconductor wafer 10, b) production of a plurality of convex projections 11 on a first main surface 12 of the silicon wafer 10 by means of a photographic technique and etching, c) application of a metal layer 13 to the entire first main surface 12, d) structuring of the metal layer 12 by means of a photographic technique and etching, in such a manner that a diaphragm 4 remains on each convex projection 11, and e) slicing through the silicon wafer 10 between the convex projections 11, along separation lines 14, tc form individual plano-convex convergence lenses 2 with a diaphragm A plurality of plano-convex convergent lenses 2 with zone diaphragms 4' are produced, for example, using an analogous method.
List of reference symbols 1 Semiconductor laser emitter 2 Convergent lens 3 Optical conductor 4 Diaphragm 5 Laser radiation 6 Vapor-deposited layer 7 Convex side 8 Convergent beam 9 Beam axis 10 Semiconductor wafer 11 Convex projection 12 Main surface 13 Metal layer 14 Separation line
Claims (8)
1. An optical system comprising a semiconductor laser emitter (1), an optical device, in particular an optical conductor (3) and a convergent lens (2), arranged between the semiconductor laser emitter (1) and the optical device, for injecting laser radiation (5), emitted from the semiconductor laser emitter (1), into the optical device, characterized in that the convergent lens (2) is provided with a coating (6) structured in the form of a diaphragm (4) in order to mask out a portion of the laser radiation (5) emitted from the semiconductor laser emitter (1).
2. The optical system as claimed in claim 1, characterized in that the structured coating (6) is composed of metal.
3. The optical system as claimed in claim 1 or 2, characterized in that the convergent lens (2) is composed of silicon.
4. The optical system as claimed in one of claims 1 to 3, characterized in that the convergent lens (2) is a plano-convex lens, of which the convex side is provided with the structured coating (6).
5. The optical system as claimed in one of claims 1 to 4, characterized in that the structured coating (6) is in the form of a perforated diaphragm (4) and masks out that portion of the laser radiation (5) whose divergence angle is greater than the acceptance angle of the optical device (3).
6. The optical system as claimed in one of claims 1 to 4, characterized in that the structured coating (6) is in the form of a zone diaphragm (4') and masks out the central beam of the laser radiation (5)
7. Use of an optical system as claimed in one of claims 1 to 6 for injecting laser radiation (5) into a multimode line, in which only the fundamental mode of the multimode line is stimulated.
8. A method for producing a plurality of piano-convex convergence lenses (2), composed of a semiconductor material, in which a diaphragm (4) is applied to the convex side (7), having the method steps:
a) production of a semiconductor wafer (10), b) production of a plurality of convex projections (11) on a first main surface (12) of the semiconductor wafer (10) by means of a photographic technique and etching, c) application of a metal layer (13) to the entire first main surface (12), d) structuring of the metal layer (12) by means of a photographic technique and etching, in such a manner that a diaphragm (4) remains on each convex projection (11), and e) slicing through the semiconductor wafer (10) between the convex projections (11) to form individual piano-convex convergence lenses (2) with a diaphragm (4).
a) production of a semiconductor wafer (10), b) production of a plurality of convex projections (11) on a first main surface (12) of the semiconductor wafer (10) by means of a photographic technique and etching, c) application of a metal layer (13) to the entire first main surface (12), d) structuring of the metal layer (12) by means of a photographic technique and etching, in such a manner that a diaphragm (4) remains on each convex projection (11), and e) slicing through the semiconductor wafer (10) between the convex projections (11) to form individual piano-convex convergence lenses (2) with a diaphragm (4).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19741702 | 1997-09-22 | ||
DE19741702.7 | 1997-09-22 | ||
PCT/DE1998/002767 WO1999015926A1 (en) | 1997-09-22 | 1998-09-17 | Optical system for injecting laser radiation into an optical fibre and method for making same |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2303885A1 true CA2303885A1 (en) | 1999-04-01 |
Family
ID=7843172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002303885A Abandoned CA2303885A1 (en) | 1997-09-22 | 1998-09-17 | Optical system for injecting laser radiation into an optical conductor, and a method for its production |
Country Status (6)
Country | Link |
---|---|
US (2) | US6434297B1 (en) |
EP (1) | EP1018053B1 (en) |
JP (1) | JP2001517810A (en) |
CA (1) | CA2303885A1 (en) |
DE (1) | DE59810104D1 (en) |
WO (1) | WO1999015926A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1104031B1 (en) * | 1999-11-15 | 2012-04-11 | Panasonic Corporation | Nitride semiconductor laser diode and method of fabricating the same |
JP2002243987A (en) * | 2001-02-13 | 2002-08-28 | Sony Corp | Optical coupling device |
US20030072525A1 (en) * | 2001-06-29 | 2003-04-17 | Theodore Sjodin | Multi-mode fiber bandwidth enhancement using an optical fiber coupler |
DE102005006052A1 (en) * | 2004-12-21 | 2006-07-06 | Osram Opto Semiconductors Gmbh | Lens, laser assembly and method of making a laser assembly |
US7375362B2 (en) * | 2005-01-13 | 2008-05-20 | Wd Media, Inc. | Method and apparatus for reducing or eliminating stray light in an optical test head |
US7302148B2 (en) * | 2005-01-13 | 2007-11-27 | Komag, Inc. | Test head for optically inspecting workpieces |
US8194045B1 (en) | 2005-01-27 | 2012-06-05 | Singleton Technology, Llc | Transaction automation and archival system using electronic contract disclosure units |
JP2009265392A (en) * | 2008-04-25 | 2009-11-12 | Hitachi Cable Ltd | Optical transmitter |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4977407A (en) * | 1981-07-23 | 1990-12-11 | Crane Patrick E | Optical collimator |
US4753521A (en) * | 1984-09-19 | 1988-06-28 | Siemens Aktiengesellschaft | Lens system for focussing a divergent laser beam |
JPS61248490A (en) * | 1985-04-26 | 1986-11-05 | Hitachi Ltd | Measurement apparatus for semiconductor laser |
US4752109A (en) * | 1986-09-02 | 1988-06-21 | Amp Incorporated | Optoelectronics package for a semiconductor laser |
DE3634187A1 (en) * | 1986-10-03 | 1988-04-07 | Siemens Ag | Optical arrangement for injecting light into a 50 mu m gradient fibre |
US4842360A (en) * | 1987-06-18 | 1989-06-27 | Summit Technology, Inc. | High energy laser-to-waveguide coupling devices and methods |
JPH02127605A (en) * | 1988-11-08 | 1990-05-16 | Toshiba Corp | Optical component device |
US4998794A (en) * | 1989-10-27 | 1991-03-12 | The Spectranetics Corporation | Meniscus lens for coupling an excimer beam into an optical fiber |
US5316640A (en) * | 1991-06-19 | 1994-05-31 | Matsushita Electric Industrial Co., Ltd. | Fabricating method of micro lens |
US5309542A (en) * | 1991-09-18 | 1994-05-03 | International Business Machines Corporation | Fiber optic transmitter modification for improved extinction ratio |
DE4133220C2 (en) | 1991-10-07 | 1994-12-15 | Siemens Ag | Fiber-lens arrangement for optical coupling |
US5243681A (en) * | 1992-04-13 | 1993-09-07 | Amp Incorporated | Aperture disk attenuator for laser diode connector |
US5316527A (en) | 1992-06-18 | 1994-05-31 | Gregory Lekhtman | Collapsible support for running in place exercising |
DE4307986A1 (en) | 1993-03-13 | 1994-09-15 | Hirschmann Richard Gmbh Co | Optical transmission device |
US5633527A (en) * | 1995-02-06 | 1997-05-27 | Sandia Corporation | Unitary lens semiconductor device |
EP0780707A1 (en) * | 1995-12-21 | 1997-06-25 | Heraeus Quarzglas GmbH | Element for UV high energy radiation transmission and method of fabrication of such an element and its utilisation |
US5853960A (en) * | 1998-03-18 | 1998-12-29 | Trw Inc. | Method for producing a micro optical semiconductor lens |
-
1998
- 1998-09-17 EP EP98956776A patent/EP1018053B1/en not_active Expired - Lifetime
- 1998-09-17 CA CA002303885A patent/CA2303885A1/en not_active Abandoned
- 1998-09-17 JP JP2000513168A patent/JP2001517810A/en active Pending
- 1998-09-17 DE DE59810104T patent/DE59810104D1/en not_active Expired - Fee Related
- 1998-09-17 WO PCT/DE1998/002767 patent/WO1999015926A1/en active IP Right Grant
-
2000
- 2000-03-22 US US09/533,562 patent/US6434297B1/en not_active Expired - Fee Related
-
2001
- 2001-05-23 US US09/863,954 patent/US6461799B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO1999015926A1 (en) | 1999-04-01 |
US20010026658A1 (en) | 2001-10-04 |
DE59810104D1 (en) | 2003-12-11 |
JP2001517810A (en) | 2001-10-09 |
US6434297B1 (en) | 2002-08-13 |
EP1018053A1 (en) | 2000-07-12 |
EP1018053B1 (en) | 2003-11-05 |
US6461799B2 (en) | 2002-10-08 |
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