Optical heterodyne receiver

Details Optical heterodyne receiver Optical heterodyne receiver

H - Electricity

04

B

325/1

H04B 10/148 (2006.01) H03F 1/22 (2006.01) H03F 3/08 (2006.01)

Patent

CA 1246678

ABSTRACT OF THE DISCLOSURE An optical receiver has a pre-amplifier stage comprising an FET-FET cascode circuit. For coherent detection, an electrical local oscillator signal is applied to the gate of one of the FETs, the frequency of which is chosen to provide either homodyne demodulation, or a second IF signal. For direct detection the cascode consists of a dual-gate FET, which is also the preferred form of cascode for coherent detection.

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