Amplitude squeezing by means of quasi-phase-matched second-harmonic generation in a lithium niobate waveguide

D. K. Serkland*, Prem Kumar, M. A. Arbore, M. M. Fejer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

We demonstrate that traveling-wave second-harmonic generation produces amplitude-squeezed light at both the fundamental and the harmonic frequencies. Quasi-phase-matched second-harmonic conversion efficiencies approaching 60% were obtained in a 26-mm-long single-mode LiNbO3 waveguide with pulses from a modelocked laser at 1.53 μm. The amplitude noise of the transmitted fundamental field was measured to be 0.8 dB below the shot-noise level, and the generated 0.765-μm harmonic light was measured to be amplitude squeezed by 0.35 dB. The conversion-efficiency dependence of the observed squeezing at both wavelengths agrees with theoretical predictions. Waveguide losses appear to degrade the squeezing, but the maximum observed squeezing is currently limited only by the available input power.

Original languageEnglish (US)
Pages (from-to)1497-1499
Number of pages3
JournalOptics Letters
Volume22
Issue number19
DOIs
StatePublished - Oct 1 1997

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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