Yeaton-Massey, D. and Adhikari, R. X. (2012) A new bound on excess frequency noise in second harmonic generation in PPKTP at the 10^(−19) level. Optics Express, 20 (19). pp. 21019-21024. ISSN 1094-4087. http://resolver.caltech.edu/CaltechAUTHORS:20121008-090445233
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We report a bound on the relative frequency fluctuations in nonlinear second harmonic generation. A 1064nm Nd:YAG laser is used to read out the phase of a Mach-Zehnder interferometer while PPKTP, a nonlinear crystal, is placed in each arm to generate second harmonic light. By comparing the arm length difference of the Mach Zehnder as read out by the fundamental 1064 nm light, and its second harmonic at 532 nm, we can bound the excess frequency noise introduced in the harmonic generation process. We report an amplitude spectral density of frequency noise with total RMS frequency deviation of 3mHz and a minimum value of 20 μHz/Hz^(1/2) over 250 seconds with a measurement bandwidth of 128 Hz, corresponding to an Allan deviation of 10^(−19) at 20 seconds.
|Additional Information:||© 2012 Optical Society of America. Received 29 Jun 2012; revised 21 Aug 2012; accepted 23 Aug 2012; published 29 Aug 2012. The authors would like to thank P. Fritschel for suggesting this work as well as K. Arai, J. Harms, and K. McKenzie, for discussions leading to the understanding presented in this letter, as well as H. Grote and M. Evans for useful input on the interferometer stabilization. We also gratefully acknowledge the National Science Foundation for support under grant PHY-0757058.|
|Group:||Institute for Quantum Information and Matter, IQIM|
|Classification Code:||OCIS codes: (190.2620) Harmonic generation and mixing; (120.2920) Homodyning; (120.3180) Interferometry|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||10 Oct 2012 18:30|
|Last Modified:||27 Dec 2012 02:49|
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