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25 May 2004 Measurements and analysis of sidemode noise for a diode laser in an external grating cavity
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Proceedings Volume 5468, Fluctuations and Noise in Photonics and Quantum Optics II; (2004) https://doi.org/10.1117/12.547168
Event: Second International Symposium on Fluctuations and Noise, 2004, Maspalomas, Gran Canaria Island, Spain
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.
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Clifford E. Fairchild, Edward Zubek, and David H, McIntyre "Measurements and analysis of sidemode noise for a diode laser in an external grating cavity", Proc. SPIE 5468, Fluctuations and Noise in Photonics and Quantum Optics II, (25 May 2004); https://doi.org/10.1117/12.547168
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