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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 24 — Dec. 15, 2012
  • pp: 5250–5252

Optimizing pump threshold and conversion efficiency of whispering gallery optical parametric oscillators by controlled coupling

Tobias Beckmann, Karsten Buse, and Ingo Breunig  »View Author Affiliations

Optics Letters, Vol. 37, Issue 24, pp. 5250-5252 (2012)

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Threshold and efficiency of optical parametric oscillation in whispering gallery resonators have been predicted to depend strongly on the coupling strength. Our experiments, varying the coupling strength continuously over 3 orders of magnitude, confirm these predictions. The pump threshold changes by a factor of 20, allowing the adaptation of the system to a wide range of input powers. The minimum threshold of 0.20 mW occurs for significant pump undercoupling. The efficiency increases monotonically with coupling, spanning 4 orders of magnitude with a maximum efficiency of 30% in contact yielding output powers exceeding 1 mW.

© 2012 Optical Society of America

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(160.3730) Materials : Lithium niobate
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(140.3945) Lasers and laser optics : Microcavities

ToC Category:
Nonlinear Optics

Original Manuscript: October 23, 2012
Revised Manuscript: November 14, 2012
Manuscript Accepted: November 23, 2012
Published: December 14, 2012

Tobias Beckmann, Karsten Buse, and Ingo Breunig, "Optimizing pump threshold and conversion efficiency of whispering gallery optical parametric oscillators by controlled coupling," Opt. Lett. 37, 5250-5252 (2012)

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