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Abstract

We describe a kHz single photon wavelength modulation technology to realize the locking reference signal of the laser frequency. By detecting the single photon acetylene gas absorption spectrum and by amplifying the lock-in the discrete single photon response pulse, we achieve the laser frequency stabilized in real time. The 1.5 m distribution feedback semiconductor laser output frequency is stabilized at acetylene gas absorption peaks, and the typical laser frequency fluctuation is less than 25 MHz within 175 s. This single photon wavelength modulated absorption spectrum technology eliminates the high background noise in low frequency range and can be used in the quantum communication system and optical wavelength division multiplex.

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1.
Funds:Project supported by the National Basic Research Program of China (973 Program) (Grant Nos. 2012CB921603, 2010CB923103), the National Natural Science Foundation of China (Grant Nos. 11174187, 61178009, 60908019, 10934004), NSFC Project for Excellent Research Team (Grant No. 60821004), the Natural Science Foundation of Shanxi Province, China (Grant No. 2011091016), TSTIT and TYMIT of Shanxi, and Shanxi Province Foundation for Returned Scholars.

References

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Vol. 61, Issue 10 - 2012-05-20

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