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arXiv · 2411.13046

Active Stabilization of Laser Diode Injection Using a Polarization-Spectroscopy Technique

Luka Milanovic·Greg Ferrero·Robin Oswald·Thomas Kinder·Julian Schmidt·Cornelius Hempel
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Abstract

Laser diode injection-locking is a commonly used method to amplify laser light, while preserving its spectral properties. Fluctuations in the environmental conditions can cause injection-locking to fail, especially when operating with low seed powers or with a swept seed frequency. We present a method inspired by the Hänsch-Couillaud scheme to monitor and actively stabilize the conditions required for injection-locking a laser diode. Using only a few optical components, our scheme can run continuously in the background and is modulation-free. We demonstrate its efficacy by showing its robustness to large fluctuations in diode temperature, seed frequency and power, effectively extending the reliable operating range and stability over time.

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Luka Milanovic, Greg Ferrero, Robin Oswald, Thomas Kinder, Julian Schmidt, Cornelius Hempel. 2024-11-20. Active Stabilization of Laser Diode Injection Using a Polarization-Spectroscopy Technique. https://arxiv.org/abs/2411.13046

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