Narrow linewidth comb realized with a mode-locked fiber laser using an intra-cavity waveguide electro-optic modulator for high-speed control.
We have developed an optical frequency comb using a mode-locked fiber ring laser with an intra-cavity waveguide electro-optic modulator controlling the optical length in the laser cavity. The mode-locking is achieved with a simple ring configuration and a nonlinear polarization rotation mechanism. The beat note between the laser and a reference laser and the carrier envelope offset frequency of the comb were simultaneously phase locked with servo bandwidths of 1.3 MHz and 900 kHz, respectively. We observed an out-of-loop beat between two identical combs, and obtained a coherent δ-function peak with a signal to noise ratio of 70 dB/Hz.
Department of Physics, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Yokohama, Kanagawa, 223-8522, Japan. h.inaba@aist.go.jp
Kana
K
Iwakuni
Hajime
H
Inaba
Yoshiaki
Y
Nakajima
Takumi
T
Kobayashi
Kazumoto
K
Hosaka
Atsushi
A
Onae
Feng-Lei
FL
Hong
D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005246:Feedback; D005374:Filtration / Q000295:instrumentation*; D007834:Lasers; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*