Semiconductor laser module

Details Semiconductor laser module Semiconductor laser module

1993-04-09

1995-02-07

Lee, John D.

Optical waveguides

With optical coupler

Input/output coupler

385 88, 385 93, 385 94, G02B 632

Patent

active

053881710

ABSTRACT:
A semiconductor laser module is used for transmitting signals by optical fiber in optoelectronic communication. The module comprises a semiconductor laser, a lens, a receptacle and a lens holder. Reflection beams at an end of a fiber must not return to the semiconductor laser. To deviate the reflection beams from the semiconductor, a key-shaped glass block is mounted in the receptacle in tight contact with the end of a fiber. Repetition of putting on and taking off ferrules contaminates the glass block. Adhesion of dust deteriorates the performance against noise induced in the laser by the return of the beam. To avoid the adhesion of dust to the surface of the transparent block, a key-shaped transparent block is inserted into an axial hole of the receptacle, separating from the block. A gap between the block and fiber prohibits dust from cohering to the block. The deviation of axes of the receptacle and lens holder is small enough. The assembly is easy. The coupling between the receptacle and lens holder has strong mechanical strength.

REFERENCES:
patent: 4355321 (1982-10-01), Yeats
patent: 5074682 (1991-12-01), Uno et al.

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