Open AccessNarrow linewidth comb realized with a mode-locked fiber laser using an intra-cavity waveguide electro-optic modulator for high-speed control
Author(s) -
Kana Iwakuni,
Hajime Inaba,
Yoshiaki Nakajima,
Takeyuki Kobayashi,
Kazumoto Hosaka,
Atsushi Onae,
Feng−Lei Hong
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.013769
Subject(s) - optics , laser linewidth , materials science , fiber laser , laser , beat (acoustics) , mode locking , polarization controller , ring laser , physics
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.