Optical coupler with high degree of isolation

Details Optical coupler with high degree of isolation Optical coupler with high degree of isolation

1993-03-05

1995-04-04

Lee, John D.

Optical waveguides

With optical coupler

Input/output coupler

385 36, 385 47, G02B 632

Patent

active

054044146

ABSTRACT:
An optical coupler comprises at least one optical fiber (1), one laser (2), one photodiode (3), one focusing lens (30) for focusing on the fiber and one plate (41) which reflects the rays coming from the fiber (1) towards the photodiode (3). In order to prevent a ray sent out by the laser (2) from returning to the photodiode (3) after reflection on the input diopter (4) of the lens (30), the optical axis is broken at the height of this diopter (4) by means of a prism (5). The reflected rays do not return to the plate (41).

REFERENCES:
patent: 4412720 (1983-11-01), Costa
patent: 5146516 (1992-09-01), Blumke et al.
Patent Abstracts of Japan, vol. 9, No. 304 (P-409), Nov. 30, 1985 & JP-A-60 138 506 Jul. 1985, S. Katagiri, "Photodetecting Element Module."
Journal of Electronic Engineering, No. 236, Aug. 23, 1986, pp. 46-49 N. Kurata, "Present Development of Optical . . . "

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