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Proceedings Paper

Efficient, Simple Optical Heterodyne Receiver: DC TO 80 GHz
Author(s): D. K. Donald; D. M. Bloom; F. K. David
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Paper Abstract

An optical receiver front end was built which detects optical heterodyne signals up to 80 GHz. The unit combines optical detection in a GaAs photodiode with RF mixing of that same detected signal in the same photodiode. At low frequencies the diode is biased with DC, working as a conventional detector. Above 2 GHz the photodiode in the unit can be excited simultaneously with both light and a local oscillator voltage. The unit then produces intermedite frequency mixer products. When the signal mixes with the fundamental of the local oscillator (LO), these products are only 5 dB weaker than the original heterodyne signal. The LO voltage was 1.4 VRMS and its frequency 2-6 GHz. Above 6 GHz higher harmonics of the LO voltage mix with the RF photosignal. They mix unusually well in this receiver, and deliver significant power to the IF amplifier. Near 80 GHz, the receiver's IF power of -88 dBm was generated when the 14th harmonic of the LO mixed with the signal.

Paper Details

Date Published: 28 October 1985
PDF: 6 pages
Proc. SPIE 0545, Optical Technology for Microwave Applications II, (28 October 1985); doi: 10.1117/12.948341
Show Author Affiliations
D. K. Donald, Hewlett-Packard Laboratories (United States)
D. M. Bloom, Stanford University (United States)
F. K. David, Hewlett-Packard Co. (United States)

Published in SPIE Proceedings Vol. 0545:
Optical Technology for Microwave Applications II
Shi-Kay Yao, Editor(s)

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