Frequency control of a chirped-mirror-dispersion-controlled mode-locked Ti:Al2O3 laser for comparison between microwave and optical frequencies

Kazuhiko Sugiyama, Atsushi Onae, Takesh Ikegami, Sergey N. Slyusarev, Feng Lei Hong, Kaoru Minoshima, Hirokazu Matsumoto, Jonathan C. Knight, William J. Wadsworth, Phillip St J. Russell

Research output: Contribution to journalArticle

6 Citations (Scopus)


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 × 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.

Original languageEnglish
Pages (from-to)95-104
Number of pages10
JournalProceedings of SPIE-The International Society for Optical Engineering
Publication statusPublished - 1 Jan 2001


  • Carrier-envelope offset
  • Chirped-mirror dispersion control
  • F:2f frequency interval chain
  • Femtosecond laser
  • Optical frequency measurement
  • Photonic crystal fiber
  • Ultrafast mode-locked laser

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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