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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 2 — Jan. 27, 2014
  • pp: 1629–1635

Carrier-envelope offset locking with a 2f-to-3f self-referencing interferometer using a dual-pitch PPLN ridge waveguide

Kenichi Hitachi, Atsushi Ishizawa, Tadashi Nishikawa, Masaki Asobe, and Tetsuomi Sogawa  »View Author Affiliations

Optics Express, Vol. 22, Issue 2, pp. 1629-1635 (2014)

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We demonstrate that a 2f-to-3f self-referencing interferometer (SRI) becomes a useful tool for stabilizing a carrier-envelope offset frequency of an Er-doped fiber laser. A dual-pitch periodically poled lithium niobate (PPLN) ridge waveguide, consisting of two monolithically integrated segments with different quasi-phase matching pitch sizes, allows us to generate third-harmonic light with high efficiency. By using this device, we obtain a 45-dB signal-to-noise ratio in 100-kHz bandwidth of a heterodyne beat signal and instability of the in-loop fCEO of 8 × 10−18 at 1 s of averaging time. This result is important for fCEO stabilization of a frequency comb, for which it is difficult to obtain a one-octave supercontinuum spectrum.

© 2014 Optical Society of America

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(140.3425) Lasers and laser optics : Laser stabilization
(320.6629) Ultrafast optics : Supercontinuum generation
(230.7405) Optical devices : Wavelength conversion devices

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 22, 2013
Revised Manuscript: December 21, 2013
Manuscript Accepted: December 27, 2013
Published: January 16, 2014

Kenichi Hitachi, Atsushi Ishizawa, Tadashi Nishikawa, Masaki Asobe, and Tetsuomi Sogawa, "Carrier-envelope offset locking with a 2f-to-3f self-referencing interferometer using a dual-pitch PPLN ridge waveguide," Opt. Express 22, 1629-1635 (2014)

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