Demonstration of carrier envelope offset locking with low pulse energy.
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.
NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan. ishizawa@will.brl.ntt.co.jp
Atsushi
A
Ishizawa
Tadashi
T
Nishikawa
Shinichi
S
Aozasa
Atsushi
A
Mori
Osamu
O
Tadanaga
Masaki
M
Asobe
Hidetoshi
H
Nakano
D004735:Energy Transfer; D005240:Feasibility Studies; D005336:Fiber Optic Technology / Q000295:instrumentation*; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D007834:Lasers; D009556:Niobium / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D013685:Telecommunications / Q000295:instrumentation*
D010087:Oxides; D009556:Niobium; C091692:lithium niobate