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arXiv · 1603.09500

Steering optical comb frequency by rotating polarization state

Y. Zhang·L. Yan·X. F. Zhang·L. Zhang·W. Han·W. Guo·H. Jiang·S. Zhang
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Abstract

Optical frequency combs, with precise control of repetition rate and carrier-envelope-offset frequency, have revolutionized many fields, such as fine optical spectroscopy, optical frequency standards, ultra-fast science research, ultra-stable microwave generation and precise ranging measurement. However, existing high bandwidth frequency control methods have small dynamic range, requiring complex hybrid control techniques. To overcome this limitation, we develop a new approach, where a home-made intra-cavity electro-optic modulator tunes polarization state of laser signal rather than only optical length of the cavity, to steer frequencies of a nonlinear-polarization-rotation mode-locked laser. By taking advantage of birefringence of the whole cavity, this approach results in not only broadband but also relative large-dynamic frequency control. Experimental results show that frequency control dynamic range increase at least one order in comparison with the traditional intra-cavity electro-optic modulator technique. In additional, this technique exhibits less side-effect than traditional frequency control methods.

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Y. Zhang, L. Yan, X. F. Zhang, L. Zhang, W. Han, W. Guo, H. Jiang, S. Zhang. 2016-03-31. Steering optical comb frequency by rotating polarization state. https://doi.org/10.1364/ol.42.005145

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