Optical Homodyne Receiver

Details Optical Homodyne Receiver Optical Homodyne Receiver

1989-11-08

1991-04-09

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

H04B 1006

Patent

active

050071068

ABSTRACT:
An optical homodyne receiver is realized by employing two separate signal amplification paths in a balanced receiver configuration. Specifically, the relative phase difference between a received optical signal and a local oscillator signal is extracted from nodes which, from the point of view of an amplifier extracting a data component signal, are at ac ground. This approach permits a phase detector amplifier, which extracts the relative phase component, to be dc coupled in addition to having a higher transimpedance for lower thermal noise, and thus higher sensitivity. Additionally, by extracting the data and phase component signals at different points in a balanced receiver configuration, the data and phase amplifiers can be separately engineered for optimum performance.

REFERENCES:
patent: 4868896 (1989-09-01), Pietzsch
J. M. Kahn et al., "Optical Phaselock Receiver with Multigigahertz Signal Bandwidth", Elec. Lett., vol. 25, No. 10, May 11, 1989, pp. 626-628.
J. M. Kahn, "1 Gbit/s PSK Homodyne Transmission System Using Phase-Locked Semiconductor Lasers", IEEE Photonics Tech. Lett., vol. 1, No. 10, Oct. 1989 pp. 340-342.
L. G. Kazovsky, "Balanced Phase-Locked Loops for Optical Homodyne Receivers: Performance Analysis, Design Considerations, and Laser Linewidth Requirements", J. Lightwave Tech., vol. LT-4, No. 2, Feb. 1986, pp. 182-195.
D. J. Malyon, "Digital Fibre Transmission Using Optical Homodyne Detection," Elec. Lett., Vol. 20, No. 7, Mar. 29, 1984, pp. 281-283.
D. J. Maylon, et al., "Semiconductor Laser Homodyne Optical Phase-Locked-Loop", Elec. Lett., vol. 22, No. 8, Apr. 10, 1986, pp. 421-422.

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