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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 6 — Feb. 20, 2003
  • pp: 1048–1051

Nearly Diffraction-Limited Signal Generated by a Lower Beam-Quality Pump in an Optical Parametric Oscillator

Shaul Pearl, Yosi Ehrlich, Shlomo Fastig, and Salman Rosenwaks  »View Author Affiliations


Applied Optics, Vol. 42, Issue 6, pp. 1048-1051 (2003)
http://dx.doi.org/10.1364/AO.42.001048


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Abstract

The beam quality of an optical parametric oscillator (OPO) within a singly resonant, confocal-positive branch unstable resonator is investigated. Resonator configurations have been found in which the beam quality of the outgoing signal exceeds the beam quality of the pump. Cavity magnification and pump-pulse duration are found to determine the signal beam quality. It is shown that signal M2 decreases with increasing pump-pulse duration for a given cavity magnification. In an experimental demonstration of a LiNbO3 OPO within an unstable resonator, pumped by a multitransversal mode beam, a signal beam with an almost-single transversal mode has been generated, whereas the multitransversal mode behavior of the pump beam is projected on the idler beam.

© 2003 Optical Society of America

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes

Citation
Shaul Pearl, Yosi Ehrlich, Shlomo Fastig, and Salman Rosenwaks, "Nearly Diffraction-Limited Signal Generated by a Lower Beam-Quality Pump in an Optical Parametric Oscillator," Appl. Opt. 42, 1048-1051 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-6-1048

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