Optical transmission and receiving module and optical communicat

Details Optical transmission and receiving module and optical communicat Optical transmission and receiving module and optical communicat

1994-10-07

1996-09-10

Ngo, John

Optical waveguides

With disengagable mechanical connector

Optical fiber to a nonfiber optical device connector

385 33, 385 37, G02B 636

Patent

active

055553346

ABSTRACT:
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.

REFERENCES:
patent: 4834485 (1989-05-01), Lee
patent: 4945527 (1990-07-01), Sunagawa
patent: 5164930 (1992-11-01), Sugiura
patent: 5181265 (1993-01-01), Nishiwaki et al.

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