发明名称 |
Optical transmission and receiving module and optical communication system using the same |
摘要 |
A bidirectional optical transmission and receiving module of a simplified structure and an optical communication system using the same. The optical transmission and receiving module includes a light emitting device and a light receiving device disposed with in a same package having an opening covered with a cover glass sheet, and a holographic diffraction grating provided on a top or lower surface of the glass sheet. In transmitting operation, a light beam emitted from the light emitting device passes through the diffraction grating to be concentrated onto an end face of an optical fiber by a lens. In receiving operation, a received light beam emanated from the end face of the optical fiber reaches the diffraction grating via the lens to be thereby diffracted. A plus-sign primary diffracted light beam resulting from the diffraction is concentrated onto a light detecting surface of the light receiving device. Signal as transmitted through the optical fiber in the form of signal light can thus be received.
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申请公布号 |
US5555334(A) |
申请公布日期 |
1996.09.10 |
申请号 |
US19940319940 |
申请日期 |
1994.10.07 |
申请人 |
HITACHI, LTD. |
发明人 |
OHNISHI, KUNIKAZU;INOUE, MASAYUKI;SUZUKI, YOSHIO;FUKUI, YUKIO |
分类号 |
G02B6/28;G02B6/42;H04B10/24;H04B10/40;(IPC1-7):G02B6/36 |
主分类号 |
G02B6/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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