Method and device for the optical filtering and photodetection o

Details Method and device for the optical filtering and photodetection o Method and device for the optical filtering and photodetection o

1989-08-01

1992-03-24

Coles, Sr., Edward L.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

H04B 1004

Patent

active

050993500

ABSTRACT:
Method and device for the optical filtering and photodetection of intensity-modulated optical signals.
Signals are injected into at least one resonating type semiconductor laser amplifier (2) close to the active layer (14) of this amplifier, the latter being polarized below its threshold current and having at least one resonance wavelength adjusted so as to coincide with the wavelength of at least one of the optical signals in order for this optical signal to be amplified by the amplifier, and the voltage existing between the terminals of the amplifier is detected so as to obtain, in the form of an electric signal, the information carried by the amplified optical signal when the angle between the polarization direction of the latter and the direction of the active layer is small.
Application for the embodiment of optical receivers.

REFERENCES:
patent: 3875400 (1975-04-01), Pao et al.
patent: 4903341 (1990-02-01), Rice
patent: 4918396 (1990-04-01), Halemane
Article by A. Alping et al., published in ELECTRONICS LETTERS, vol. 20, No. 19, 13.9.1984, pp. 794/795.
Article by H. Kawaguchi et al., published in APPLIED PHYSICS LETTERS, vol. 50 No. 2, 12.2.1987, pp. 66/67.
Article by G. Grobkoff et al., published in ELECTRONICS LETTERS, vol. 23, No. 25, 3.12.1987, pp. 1387/1388.
Abstract of Japanese patent 62-241 387 (NIPPON TELEGRAPH AND TELEPHONE CORP.).

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