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Proceedings Paper

Stability measurements of an optically injection-locked microwave oscillator
Author(s): Christian Beaulieu; Martin Chamberland; Michel Tetu; Pierre Tremblay
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Paper Abstract

Experimental results on the direct injection-locking of a microwave oscillator by an intensity modulated optical signal are presented. Starting with a free-running oscillator, RF spectrum measurements are done as we vary the modulation frequency of the optical signal impinging on the oscillator. The locking range (as much as 5 MHz) is measured for different modulating signal power levels on the laser diode at the fundamental frequency and at the 2nd, 3rd and 5th subharmonics. Frequency stability measurements are conducted in both time domain (Allan variance) and frequency domain (power spectral density). It shows that the phase noise and the long term stability of the microwave oscillator are greatly improved under locked condition. The Allan standard deviation of the microwave oscillator at (tau) equals 0.1 s improves from 10-6 to 10-10 reaching the precision limit of the measurement setup.

Paper Details

Date Published: 30 April 1993
PDF: 12 pages
Proc. SPIE 1837, Frequency-Stabilized Lasers and Their Applications, (30 April 1993); doi: 10.1117/12.143687
Show Author Affiliations
Christian Beaulieu, Univ. Laval (Canada)
Martin Chamberland, Univ. Laval (Canada)
Michel Tetu, Univ. Laval (Canada)
Pierre Tremblay, Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 1837:
Frequency-Stabilized Lasers and Their Applications
Y. C. Chung, Editor(s)

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