1-GHz harmonically pumped femtosecond optical parametric oscillator frequency comb

K. Balskus, S. M. Leitch, Zhaowei Zhang, R. A. McCracken, D. T. Reid

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Abstract

We present the first example of a femtosecond optical parametric oscillator frequency comb harmonically-pumped by a 333-MHz Ti:sapphire laser to achieve a stabilized signal comb at 1-GHz mode spacing in the 1.1-1.6-μm wavelength band. Simultaneous locking of the comb carrierenvelope-offset and repetition frequencies is achieved with uncertainties over 1 s of 0.27 Hz and 5 mHz respectively, which are comparable with those of 0.27 Hz and 1.5 mHz achieved for 333-MHz fundamental pumping. The phase-noise power-spectral density of the CEO frequency integrated from 1 Hz-64 kHz was 2.8 rad for the harmonic comb, 1.0 rad greater than for fundamental pumping. The results show that harmonic operation does not substantially compromise the frequency-stability of the comb, which is shown to be limited only by the Rb atomic frequency reference used.

Original languageEnglish
Pages (from-to)1283-1288
Number of pages6
JournalOptics Express
Volume23
Issue number2
Early online date20 Jan 2015
DOIs
Publication statusPublished - 20 Jan 2015

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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