3 May 2001 Frequency control of a chirped-mirror-dispersion-controlled mode-locked Ti:Al2O3 laser for comparison between microwave and optical frequencies
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Abstract
The use of an optical frequency comb generated by an ultrafast mode-locked laser has been realized as a promising method of the direct comparison between microwave and optical frequencies. We are currently investigating frequency control of a chirped-mirror-dispersion-controlled mode-locked Ti:Al2O3 laser. We stabilized the pulse repetition rate frep to a rf synthesizer locked to a cesium (Cs) clock to the Allan deviation of 4 X 10-12 in 1 s. We found that the position of the crystal, rotation of the chirped mirrors, and change of the pump-laser power can be used in controlling the carrier-envelope offset frequency fCEO. We extended the span of the comb to over one octave, i.e., from 530 nm to 1190 nm, at -20 dB using a photonic-crystal fiber made at the University of Bath. We are currently trying to measure the frequency of an iodine-stabilized Nd:YAG laser using a floating ruler of a f:2f frequency interval chain. We detected the self-referencing beat between the fundamental and second- harmonic frequencies of the comb, which will enable further precise comparison between microwave and optical frequencies through the control of the fCEO.
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Kazuhiko Sugiyama, Kazuhiko Sugiyama, Atsushi Onae, Atsushi Onae, Takeshi Ikegami, Takeshi Ikegami, Sergey Slyusarev, Sergey Slyusarev, Feng-Lei Hong, Feng-Lei Hong, Kaoru Minoshima, Kaoru Minoshima, Hirokazu Matsumoto, Hirokazu Matsumoto, Jonathan C. Knight, Jonathan C. Knight, William J. Wadsworth, William J. Wadsworth, Philip St.J. Russell, Philip St.J. Russell, } "Frequency control of a chirped-mirror-dispersion-controlled mode-locked Ti:Al2O3 laser for comparison between microwave and optical frequencies", Proc. SPIE 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications, (3 May 2001); doi: 10.1117/12.424458; https://doi.org/10.1117/12.424458
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