An opto-mechanical coupled-ring reflector driven by optical force for lasing wavelength control

M. Ren, H. Cai, L. K. Chin, J. G. Huang, Y. D. Gu, K. Radhakrishnan, W. Ser and A. Q. Liu

In this paper, an opto-mechanical coupled-ring reflector driven by optical gradient force is applied in an external-cavity tunable laser. A pair of mutually coupled ring resonators with a free-standing arc serves as a movable reflector. It obtains a 13.3-nm wavelength tuning range based on an opto-mechanical lasing-wavelength tuning coefficient of 127 GHz/nm. The potential applications include optical network, on-chip optical trapping, sensing, and biology detection.

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