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arXiv · 1204.6383

Upconversion of optical signals with multi-longitudinal-mode pump lasers

J. S. Pelc·G. -L. Shentu·Q. Zhang·M. M. Fejer·J. -W. Pan
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Abstract

Multi-longitudinal-mode lasers have been believed to be good candidates as pump sources for optical frequency conversion. However, we present a semi-classical model for frequency conversion of optical signals with a multimode pump laser, which shows that fluctuations of the instantaneous pump power limit the conversion efficiency. In an experiment, we upconverted a 1550 nm optical signal in a periodically poled lithium niobate waveguide using with a multi-longitudinal-mode laser, an observed a maximum conversion efficiency of 70%, in good agreement with our theoretical model. Compared to single-mode pumping, multimode pumping is not a suitable technique for attaining stable near-unity-efficiency frequency conversion. However, the results obtained here could find application in characterization of the spectral or temporal structure of multi-longitudinal-mode lasers.

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J. S. Pelc, G. -L. Shentu, Q. Zhang, M. M. Fejer, J. -W. Pan. 2012-04-28. Upconversion of optical signals with multi-longitudinal-mode pump lasers. https://doi.org/10.1103/physreva.86.033827

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