Demonstration of carrier envelope offset locking with low pulse energy

• DOI: 10.1364/oe.16.004706
• Publication Date: 2008-03-21T15:07:07Z
• Authors: Atsushi Ishizawa; Tadashi Nishikawa; Shinichi Aozasa; Atsushi Mori; Osamu Tadanaga; Masaki Asobe; Hidetoshi Nakano
• Keywords: Energy Transfer; Lasers; Niobium; 0103 physical sciences; Telecommunications; Feasibility Studies; Fiber Optic Technology; Oxides; 01 natural sciences; Filtration

We demonstrate a carrier-envelope-offset (CEO)- locked frequency comb with 230-pJ fiber coupling pulse energy by using a passively mode-locked Er-fiber amplifier laser. For the generation of an octave-bandwidth spectrum in a highly nonlinear fiber and the second harmonic in a self-referenced interferometer with the lower pulse energy, we use a tellurite photonic crystal fiber and a direct-bonded quasi-phasematched LiNbO3 ridge waveguide, respectively. Our method is feasible for locking the CEO with a lower pulse energy to obtain a low-noise and highaccuracy optical frequency comb at telecommunications wavelengths.