Amplified noise nonstationarity in a mode-locked laser based on nonlinear polarization rotation

Beat note measurements between a mode-locked and a continuous-wave laser as well as between two mode-locked sources were used to demonstrate that the sub-threshold, cavity filtered, amplified spontaneous emission is not stationary even when a fast mode-locking mechanism, such as nonlinear polarizati...

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Bibliographic Details
Published in:arXiv.org 2019-09
Main Authors: Carlos Andres Perilla Rozo, Guay, Philippe, Jean-Daniel Deschênes, Genest, Jérôme
Format: Article
Language:English
Subjects:
Amplification
Continuous wave lasers
Laser applications
Laser mode locking
Modulation
Polarization
Rotation
Short pulses
Spontaneous emission
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Summary:Beat note measurements between a mode-locked and a continuous-wave laser as well as between two mode-locked sources were used to demonstrate that the sub-threshold, cavity filtered, amplified spontaneous emission is not stationary even when a fast mode-locking mechanism, such as nonlinear polarization rotation, is used to generate short pulses. A relatively small gain modulation of a few percents created by high intensity pulses can produce a significant modulation of the amplified noise once synchronously accumulated over several cavity round-trips, even if the repetition rate is faster than the gain dynamics.
ISSN:2331-8422
DOI:10.48550/arxiv.1909.09450