Fixed optical attenuator for light rays guided by optical fibres

Details Fixed optical attenuator for light rays guided by optical fibres Fixed optical attenuator for light rays guided by optical fibres

1979-03-26

1981-03-24

Levy, Stewart J.

350 9618, 350439, 350314, G02B 514

Patent

active

042576717

ABSTRACT:
The present invention relates to the optical fibre technology and more particularly to fixed optical attenuators for insertion in an optical fibre transmission path. The optical attenuator includes an attenuator element 1, two lenses 2, 3 which are aligned with each other and separated by the attenuator element 1 and two optical fibre connections disposed on either side of the assembly formed by the lenses 2, 3 and the attenuator element 1. It may be used as a level adaptor between a source of light rays and a device which is connected to it by an optical fibre or in test, calibration or measuring instruments for optical fibre systems.

REFERENCES:
patent: 2981826 (1961-04-01), Mattern
patent: 3761184 (1973-09-01), McLaughlin, Jr.
patent: 3829195 (1974-08-01), Rawson
patent: 3944327 (1976-03-01), Larsen
patent: 3970360 (1976-07-01), Kersten
patent: 4102559 (1978-07-01), Hunzinger
K. Usui et al., "Three-way Optical Directional Coupler", Mar. 1978.

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