Coherent optical receiver having optically amplified local oscil

Details Coherent optical receiver having optically amplified local oscil Coherent optical receiver having optically amplified local oscil

1995-01-09

1995-10-31

Turner, Samuel A.

Optics: measuring and testing

By particle light scattering

With photocell detection

359191, G01B 902

Patent

active

054634610

ABSTRACT:
The coherent optical receiver is characterized in that it comprises a local oscillator light, source, for amplifying a local oscillator light a light combining/dividing unit, a dual balanced receiver which comprises two optical detectors, and an electrical amplifier. Therefore, the coherent optical receiver has the characteristic that the length of the non-repeating section of an optical communication system including the device and employing heterodyne detection can be increased, or the dynamic range of an optical measuring system including this receiver and employing heterodyne detection can be widened.

REFERENCES:
patent: 4596052 (1986-06-01), Wright et al.
patent: 4718121 (1988-01-01), Epworth
patent: 5035506 (1991-07-01), Ouhayoun
patent: 5170275 (1992-12-01), Large
"The Use of an Optical Amplifier in a Coherent Receiver" by Shiro RYU et al., Institute of Electronics Information and Communication Engineers, pp. 19-24, May 24, 1991.
Electronics Letters, Apr. 10, 1986, vol. 22, No. 8, pp. 413-414, "Balanced Dual-Detector Receiver for Optical Heterodyne Communication at Gbit/s Rates".
Optics Letters, Aug., 9183, vol. 8, No. 8, pp. 419-421, "Local-Oscillator Excess-Noise Suppression for Homodyne and Heterodyne Detection".

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