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  • 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
  • (Optica Publishing Group, 2017),
  • paper ED_P_6

Reduced Pulse Energy for Frequency Stabilization with a Dual-Pitch Periodically Poled Lithium Niobate Ridge Waveguide

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Abstract

Techniques for stabilizing the carrier-envelope offset (CEO) frequency of an optical frequency comb are prerequisites for precision spectroscopy. A 2f-to-3f self-referencing interferometer (SRI) requires only a 2/3-octave bandwidth of supercontinuum (SC) light; however, it has not been regarded as a practical method because the conversion efficiency of third-harmonic generation is much lower than that of the second-harmonic generation. To solve this problem, we utilized a dual-pitch periodically poled lithium niobate (PPLN) ridge waveguide that has two different quasi-phase matching pitch sizes [Fig. 1(a)] [1]. Here, we report the advantage of using the dual-pitch PPLN ridge waveguide over using a single-pitch one, i.e., reduction of the pulse energy for stabilizing the CEO frequency.

© 2017 IEEE

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