Critical coupling control of a microresonator by laser amplitude modulation
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Chow, Jong H; Taylor, Michael A; Lam, Timothy T-Y; Knittel, Joachim; Sawtell-Rickson, Jye D; Shaddock, Daniel A; Gray, Malcolm B; McClelland, David E; Bowen, Warwick P
Description
We present a laser amplitude modulation technique to actively stabilize the critical coupling of a microresonator by controlling the evanescent coupling gap from an optical fiber taper. It is a form of nulled lock-in detection, which decouples laser intensity fluctuations from the critical coupling measurement. We achieved a stabilization bandwidth of ∼ 20 Hz, with up to 5 orders of magnitude displacement noise suppression at 10 mHz, and an inferred gap stability of better than a picometer/√Hz.
Collections | ANU Research Publications |
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Date published: | 2012-05-21 |
Type: | Journal article |
URI: | http://hdl.handle.net/1885/101237 |
Source: | Optics express |
DOI: | 10.1364/OE.20.012622 |
Access Rights: | Open Access |
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