High-efficiency frequency doubling of continuous-wave laser light

S. Ast, R.M. Nia, A. Schonbeck, N. Lastzka, J. Steinlechner, T. Eberle, M. Mehmet, S. Steinlechner, R. Schnabel*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


We report on the observation of high-efficiency frequency doubling of 1550 nm continuous-wave laser light in a nonlinear cavity containing a periodically poled potassium titanyl phosphate crystal (PPKTP). The fundamental field had a power of 1.10W and was converted into 1.05W at 775nm, yielding a total external conversion efficiency of 95 +/- 1%. The latter value is based on the measured depletion of the fundamental field being consistent with the absolute values derived from numerical simulations. According to our model, the conversion efficiency achieved was limited by the nonperfect mode matching into the nonlinear cavity and by the nonperfect impedance matching for the maximum input power available. Our result shows that cavity-assisted frequency conversion based on PPKTP is well suited for low-decoherence frequency conversion of quantum states of light. (C) 2011 Optical Society of America
Original languageEnglish
Pages (from-to)3467-3469
Number of pages3
JournalOptics Letters
Issue number17
Publication statusPublished - 1 Sept 2011
Externally publishedYes


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