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Published August 20, 2004 | public
Journal Article Open

Kerr-Nonlinearity Optical Parametric Oscillation in an Ultrahigh-Q Toroid Microcavity


Kerr-nonlinearity induced optical parametric oscillation in a microcavity is reported for the first time. Geometrical control of toroid microcavities enables a transition from stimulated Raman to optical parametric-oscillation regimes. Optical parametric oscillation is observed at record low threshold levels (174 micro-Watts of launched power) more than 2 orders of magnitude lower than for optical-fiber-based optical parametric oscillation. In addition to their microscopic size (typically tens of microns), these oscillators are wafer based, exhibit high conversion efficiency (36%), and are operating in a highly ideal "two photon" emission regime, with near-unity (0.97±0.03) idler-to-signal ratio.

Additional Information

©2004 The American Physical Society (Received 29 January 2004; published 19 August 2004) This work was funded by the NSF, DARPA, and the Caltech Lee Center for Advanced Networking. Note added.—The authors request the readers' attention to a parametric LiNbO3 device reported by Ilchenko et al. [34].


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