Nonlinear absorption and phase shift in coupled optical cavities

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Abstract

The nonlinear absorption process and associated phase shift in coupled optical cavities are studied experimentally by observing optical resonance properties. In the coupled cavity configuration, two optical cavities, one for a fundamental beam and the other for a second-harmonic (SH) beam, are coupled by a nonlinear crystal for the second-harmonic generation (SHG). The cavity for the SH beam effectively extends the nonlinear crystal length so that the frequency-conversion efficiency of the SHG, which is proportional to the square of the crystal length, is enhanced. In the observation, power reduction of the fundamental beam at resonance is observed as a small dip in the resonance curve. According to a model calculation, it is found that this power reduction is caused by blue-induced infrared absorption.

Original languageEnglish
Article number043815
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume92
Issue number4
DOIs
Publication statusPublished - 2015 Oct 13

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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