Long-term measurement of optical frequencies using a simple, robust and low-noise fiber based frequency comb.
We have developed a fiber-based frequency comb system consisting of a simple mode-locked fiber laser and a backward pumping amplifier combined with a highly nonlinear fiber with a short zerodispersion wavelength. As a result, the signal to noise ratio of the obtained carrier-envelope-offset frequency beat is larger than 45 dB at a bandwidth of 100 kHz. Furthermore, we have succeeded in measuring the optical frequencies of a 1542-nm acetylene-stabilized laser and a 532-nm iodinestabilized Nd:YAG laser continuously for more than one week using the fiber-based comb system. The long-term measurement revealed that the frequency stability of the iodine-stabilized laser was 5.7 x 10(-15) with 100 000 s averaging.
Inaba
Hajime
H
Daimon
Yuta
Y
Hong
Feng-Lei
FL
Onae
Atsushi
A
Minoshima
Kaoru
K
Schibli
Thomas R
TR
Matsumoto
Hirokazu
H
Hirano
Masaaki
M
Okuno
Toshiaki
T
Onishi
Masashi
M
Nakazawa
Masataka
M