Title :
Optical Frequency Synthesis From a Cryogenic Sapphire Oscillator Using a Fiber-Based Frequency Comb
Author :
Watabe, Ken-ichi ; Inaba, Hajime ; Okumura, Kenichiro ; Hong, Feng-Lei ; Hartnett, John G. ; Locke, Clayton R. ; Santarelli, Giorgio ; Yanagimachi, Shinya ; Minoshima, Kaoru ; Ikegami, Takeshi ; Onae, Atsushi ; Ohshima, Shin-Ichi ; Matsumoto, Hirokazu
Author_Institution :
National Metrol. Inst. of Japan, National Inst. of Adv. Ind. Sci. & Technol., Tsukuba
fDate :
4/1/2007 12:00:00 AM
Abstract :
The authors have demonstrated optical frequency synthesis using a fiber-based frequency comb system, referenced to an ultrastable microwave oscillator. The oscillator is based on a high Q-factor cryogenic sapphire resonator cooled with liquid helium. The 100-MHz signal synthesized from the 10.8-GHz oscillation frequency of the cryogenic sapphire oscillator (CSO) was used to stabilize the repetition frequency of the mode-locked fiber laser. When the synthesized optical frequency was compared with a rubidium two-photon stabilized laser at 778 nm, the measured fractional frequency stability was ~6 10-14 tau -12 for the averaging times tau between 1 and 100 s, and the best frequency stability was 3.0 10-15 for an averaging time of 1280 s
Keywords :
Q-factor; cryogenic electronics; crystal oscillators; fibre lasers; frequency multipliers; frequency synthesizers; laser frequency stability; laser mode locking; microwave oscillators; microwave photonics; sapphire; 1 to 100 s; 10.8 GHz; 100 MHz; 1280 s; 778 nm; Q-factor; cryogenic sapphire oscillator; frequency comb; frequency stability; frequency synthesizer; microwave oscillator; optical frequency synthesis; two-photon stabilized laser; Cryogenics; Fiber lasers; Frequency synthesizers; Helium; Laser mode locking; Laser stability; Microwave oscillators; Optical resonators; Q factor; Signal synthesis; Cryogenic sapphire resonator; f requency synthesizer; fiber-based frequency comb; microwave oscillator; optical frequency synthesis; rubidium two-photon stabilized laser;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2007.891073
