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Proceedings Paper

Measurements and analysis of sidemode noise for a diode laser in an external grating cavity
Author(s): Clifford E. Fairchild; Edward Zubek; David H, McIntyre
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Paper Abstract

We measure variations in optical and radio frequency (rf) noise for a diode laser operating single mode in an external grating cavity (EGC). The laser operates at fixed current and temperature; and its frequency is varied within a single EGC mode by changing the length of the EGC using a piezo-electric transducer. The major features of the rf noise spectrum are a doublet occurring near the EGC mode separation, and its multiples, and a low frequency rf continuum in the 0-100 MHz frequency range. The optical spectrum, which is measured using a scanning Fabry-Perot interferometer, consists of the lasing mode and subthreshold nonlasing sidemodes. The origin of these sidemodes is four-wave mixing in the laser crystal. As the laser frequency is varied within a given EGC mode, the features of the rf spectra and the optical sidemode spectra all vary systematically. Some of the observed variations can be explained simply and others cannot.

Paper Details

Date Published: 25 May 2004
PDF: 10 pages
Proc. SPIE 5468, Fluctuations and Noise in Photonics and Quantum Optics II, (25 May 2004); doi: 10.1117/12.547168
Show Author Affiliations
Clifford E. Fairchild, Oregon State Univ. (United States)
Edward Zubek, Oregon State Univ. (United States)
David H, McIntyre, Oregon State Univ. (United States)


Published in SPIE Proceedings Vol. 5468:
Fluctuations and Noise in Photonics and Quantum Optics II
Peter Heszler, Editor(s)

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