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Opt Lett. 2007 Jul 1;32(13):1800-2.

Temperature compensation of optical microresonators using a surface layer with negative thermo-optic coefficient.

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Bradley Department of Electrical and Computer Engineering, Center for Photonics Technology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0111, USA.


We theoretically investigate the feasibility of using a surface layer with a negative thermo-optic coefficient to compensate the thermal drift of a resonant frequency in an optical microresonator. Taking a fused-silica microsphere as an example, our analysis has shown that the thermal drift of a whisper-gallery mode can be fully compensated by such a surface layer. We analyze and compare the compensation performances by using different materials as the surface layer.


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