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Modulation-free control of a continuous-wave second-harmonic generator

D A Shaddock, B C Buchler, W P Bowen, M B Gray and P K Lam

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We present results for continuous-wave second-harmonic generation of 532 nm light in an external cavity locked using a spatial mode interference technique. This technique does not require frequency modulation and thus yields a clean second-harmonic spectrum devoid of modulation sidebands. The performance is compared with the same system controlled by Pound-Drever-Hall locking. Both techniques achieved the same maximum output power with comparable stability which is predominantly limited by fluctuations in the pump power and the nonlinear crystal temperature.


PACS

42.65.Ky Frequency conversion; harmonic generation, including higher-order harmonic generation

42.25.Hz Interference

Subjects

Optics, quantum optics and lasers

Dates

Issue 5 (September 2000)

Received 8 February 2000, in final form 19 May 2000



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