An optical semiconductor hermetic sealing package for accommodating an optical semiconductor element therein, comprising: a frame made of a metal, an insulator, or a composite of metal and insulator; a first bottom plate made of a metal fixed to the frame; a second bottom plate whose Young's modulus...http://www.google.com/patents/US6614590?utm_source=gb-gplus-sharePatent US6614590 - Optical semiconductor hermetic sealing package, optical semiconductor module and optical fiber amplifier
