Device for optical heterodyne detection and optical component su

Details Device for optical heterodyne detection and optical component su Device for optical heterodyne detection and optical component su

1990-10-02

1992-06-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

359192, G02F 101

Patent

active

051265575

ABSTRACT:
An optical heterodyne or homodyne receiver comprises an integrated optical component (140) in which the local oscillator beam and the signal beam are combined and simultaneouly split into orthogonally polarized sub-beams. The optical component comprises a polarization-sensitive beam-splitting layer in a first face (141) and a second beam-splitting layer in a second face (142) which is perpendicular thereto. This second layer functions as a beam-combining element in the optical receiver and has two distinct portions (142a and 142b), one portion (142a) of which passes and reflects one state of polarization (s) to the desired extent and the other portion (142b) having this property for the other state of polarization (p).

REFERENCES:
patent: 4506388 (1985-03-01), Monerie et al.
patent: 4912059 (1990-03-01), Newman et al.
patent: 5003625 (1991-03-01), Khoe
patent: 5003626 (1991-03-01), Kuwahara et al.

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