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Relative intensity noise of a mid-infrared quantum cascade laser: insensitivity to optical feedback

2019-10-08

Authors: Zhao, BB; Wang, XG; Zhang, JC; Wang, C

OPTICS EXPRESS

Volume: 27 Issue: 19 Pages: 26639-26647 Published: SEP 16 2019 Language: English Document type: Article

DOI: 10.1364/OE.27.026639

Abstract:

This article experimentally demonstrates that the relative intensity noise (RIN) of a mid-infrared quantum cascade laser is insensitive to the optical feedback for feedback ratios up to 31% (-5.1 dB). The RIN of the free-running laser is in the range of -150 dB/Hz to -160 dB/Hz, while the optical feedback induced RIN variation is less than +/- 2.0dB. In addition, the feedback-induced lasing frequency variation is less than 2.0 GHz. Rate equation analyses of the laser are in good agreement with the experimental observations. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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