Temporal coherence in mirrorless optical parametric oscillators
2012 (English)In: Journal of the Optical Society of America. B, Optical physics, ISSN 0740-3224, Vol. 29, no 6, 1194-1202 p.Article in journal (Refereed) Published
One of the unique features of mirrorless optical parametric oscillators based on counterpropagating three-wave interactions is the narrow spectral width of the wave generated in the backward direction. In this work, we investigate experimentally and numerically the influence that a strong phase modulation in the pump has on the spectral bandwidths of the parametric waves and on the efficiency of the nonlinear interaction. The effects of group-velocity mismatch and group-velocity dispersion are elucidated. In particular, it is shown that the substantial increase in temporal coherence of the backward-generated wave can be obtained even for pumping with a temporally incoherent pump. A configuration of a mirrorless optical parametric oscillator is proposed where this gain in spectral coherence is maximized without a penalty in conversion efficiency by employing group-velocity matching of the pump and the forward-generated parametric wave.
Place, publisher, year, edition, pages
2012. Vol. 29, no 6, 1194-1202 p.
Counterpropagating, Group velocities, Group-velocity mismatch, Incoherent pump, Nonlinear interactions, Parametric waves, Spectral bandwidth, Spectral coherence, Spectral widths, Temporal coherence, Three-wave interactions, Unique features, Conversion efficiency, Phase modulation
IdentifiersURN: urn:nbn:se:kth:diva-92274DOI: 10.1364/JOSAB.29.001194ISI: 000305029900008ScopusID: 2-s2.0-84861809132OAI: oai:DiVA.org:kth-92274DiVA: diva2:513086
FunderSwedish Research Council
QC 201207022012-03-302012-03-302012-07-02Bibliographically approved