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Long-term frequency stabilization system for external cavity diode laser based on mode boundary detection

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4 Author(s)
Xu, Zhouxiang ; Department of Physics, Zhejiang University, Hangzhou 310027, People''s Republic of China ; Huang, Kaikai ; Jiang, Yunfeng ; Lu, Xuanhui

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We have realized a long-term frequency stabilization system for external cavity diode laser (ECDL) based on mode boundary detection method. In this system, the saturated absorption spectroscopy was used. The current and the grating of the ECDL were controlled by a computer-based feedback control system. By checking if there are mode boundaries in the spectrum, the control system determined how to adjust current to avoid mode hopping. This procedure was executed periodically to ensure the long-term stabilization of ECDL in the absence of mode hops. This diode laser system with non-antireflection coating had operated in the condition of long-term mode-hop-free stabilization for almost 400 h, which is a significant improvement of ECDL frequency stabilization system.

Published in:

Review of Scientific Instruments  (Volume:82 ,  Issue: 12 )