Improved idler beam quality via simultaneous parametric oscillation and signal-to-idler conversion

Shani Sharabi, Gil Porat, Ady Arie

Research output: Contribution to journalArticlepeer-review

Abstract

We report on an improvement of idler beam quality in a singly resonant optical parametric oscillator (OPO), where the resonant signal is converted to the idler via an additional difference frequency generation (DFG) process. The two processes are phase matched simultaneously by a quasi-periodically poled nonlinear crystal. Whereas backconversion of the signal and idler to the pump frequency distorts the idler beam in a standard OPO, in a quasiperiodic OPO the DFG process reduces the signal intensity, leading to suppression of back-conversion and, hence, improvement in idler beam quality. Indeed, the experimental results show under the same pump power a significant improvement in idler beam quality for the quasi-periodic OPO (1 ≤ M2 ≤ 2.1) as compared with the standard OPO (3.2 ≤ M2 ≤ 5.3).

Original languageEnglish
Pages (from-to)2152-2155
Number of pages4
JournalOptics Letters
Volume39
Issue number7
DOIs
StatePublished - 1 Apr 2014

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