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Updated: May 16, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
Influence of pump and seed modulation on the mode instability thresholds of fiber amplifiers
1AS-Photonics, LLC, 8500 Menaul Blvd NE, Suite B335, Albuquerque, New Mexico 87112, USA. arlee.smith@as-photonics.com
Abstract:
Using numerical simulations of thermally induced mode coupling we show how the instability threshold can be substantially reduced if the pump or injected signal is modulated in the kHz range. We also show how the mode coupling gain varies with the frequency offset of the parasitic mode. We model thresholds when the source of detuned light is quantum background, amplitude modulation of the pump power, and amplitude modulation of the signal seed. We suggest several key experimental and modeling tests of our model.
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