Automatic mode-matching of a Fabry-Perot cavity with a single photodiode and spatial light modulation
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Ralph, Tarquin; Altin, Paul; Rabeling, David; McClelland, David; Shaddock, Daniel
Description
Conventional cavity alignment sensing uses multi-element photodiodes to sense the matching of a laser beam to the mode of a cavity. We present a new approach that uses a single-element photodiode combined with deformable mirrors to modulate orthogonal codes across distinct spatial regions of the laser wavefront. By decoding the photodiode signal it is possible to map the mode mismatch and produce error signals for feedback to the mirrors to optimize the coupling of the laser to the cavity. We...[Show more]
Collections | ANU Research Publications |
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Date published: | 2020 |
Type: | Journal article |
URI: | http://hdl.handle.net/1885/274325 |
Source: | Journal of Optics |
DOI: | 10.1088/2040-8986/abb3a8 |
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Tarquin_Ralph_2020_J._Opt._22_105605.pdf | 1.05 MB | Adobe PDF | Request a copy |
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