Optical waveguides – With optical coupler – Plural
Patent
1996-01-24
1997-11-11
Healy, Brian
Optical waveguides
With optical coupler
Plural
385 11, 385 15, 385 42, 385 88, 385 89, 359189, 359191, 359192, 359195, G02B 628, H04B 1006
Patent
active
056872615
ABSTRACT:
The present invention is a laser heterodyne frequency generator system with a stabilizer for use in the microwave and millimeter-wave frequency ranges utilizing a photonic mixer as a photonic phase detector in a stable optical fiber delay-line. Phase and frequency fluctuations of the heterodyne laser signal generators are stabilized at microwave and millimeter wave frequencies by a delay line system operating as a frequency discriminator. The present invention is free from amplifier and mixer 1/.function. noise at microwave and millimeter-wave frequencies that typically limit phase noise performance in electronic cavity stabilized electronic oscillators. Thus, 1/.function. noise due to conventional mixers is eliminated and stable optical heterodyne generation of electrical signals is achieved.
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patent: 5204640 (1993-04-01), Logan, Jr.
patent: 5379309 (1995-01-01), Logan, Jr.
California Institute of Technology
Healy Brian
LandOfFree
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