Efficient Carrier-Envelope Offset Locking with a Simplified Configuration of an $f$-to-$2f$ Interferometer

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概要

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• We demonstrate a carrier-envelope-offset (CEO) locking of a frequency comb in the 1.5-μm band with 500-pJ laser pulse energy. To achieve the CEO locking in the 1.5-μm band with low laser pulse energy, we improve the efficiency of the laser coupling into our tellurite photonic crystal fiber using angled V-groove splicing. In addition, we use a minimum number of optics in a collinear $f$-to-$2f$ interferometer to avoid connection and propagation losses. Our method does not need any devices for group delay adjustment. Since we use a short, highly nonlinear fiber with low chromatic dispersion for octave-spanning supercontinuum (SC) generation, the group delay between the short- and long-wavelength on an octave-wide SC spectrum is about 3 ps, which does not cause serious degradation of the CEO beat signal.

• 2011-02-25

著者

• TADANAGA Osamu

  NTT Photonics Laboratories

• Ishizawa Atsushi

  Ntt Basic Research Laboratories Nippon Telegraph And Telephone Corp.

• Asobe Masaki

  Ntt Photonics Laboratories

• NISHIKAWA Tadashi

  NTT Basic Research Laboratories

• Mori Atsushi

  Ntt Photonics Laboratories Ntt Corporation

• Nakano Hidetoshi

  Ntt Basic Research Laboratories

• Nishikawa Tadashi

  NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan

• Aozasa Shinichi

  NTT Access Network Service Systems Laboratories, NTT Corporation, 1-7-1 Hanabatake, Tsukuba, Ibaraki 305-0805, Japan

• Tadanaga Osamu

  NTT Photonics Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan

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