Orthogonal Control of Femtosecond Mode-Locked Laser Having Zero Carrier-Offset Frequency with Three-Axis PZT

Tai Hyun Yoon, Seong Tae Park, Eok Bong Kim, Jin Yong Yeom

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The authors demonstrate an optical frequency synthesizer based on a femtosecond (fs) mode-locked Ti:sapphire (Ti:s) laser by simultaneously stabilizing the carrier-offset frequency fceo and repetition rate frep, referenced to the Cs atomic frequency standard. By using two wide-band digital phase-detectors they realize a phase-coherent link between frep and fceo with the relation fceo = f AOM - 5/6frep ≡ 0, where fAOM = 5/6f rep is the phase-locked driving frequency of an acousto-optic modulator in a self-referencing interferometer and frep = 100 MHz. For the simultaneous control of frep and fceo, an orthogonalization scheme using a three-axis piezoelectric transducer is introduced by which the end mirror of fs laser is controlled. As a result, the authors could stabilize all components of the fs laser comb at once with an equal frequency separation frep = 100 MHz with fceo = 0. In their optical frequency synthesizer, the frequency of the nth component (fn) is given exactly by the simple relation fn = nf rep, enabling them to use the fs laser comb as a frequency ruler in the optical frequency metrology.

Original languageEnglish
Pages (from-to)1025-1029
Number of pages5
JournalIEEE Journal on Selected Topics in Quantum Electronics
Issue number4
Publication statusPublished - 2003 Jul
Externally publishedYes

Bibliographical note

Funding Information:
Manuscript received January 6, 2003; revised July 11, 2003. This work was supported by the Creative Research Initiatives Program, Ministry of Science and Technology, Korea. The authors are with the Center for Optical Frequency Control, Korea Research Institute of Standards and Science, Daejeon 305-340, Korea (e-mail: thyoon@kriss.re.kr). Digital Object Identifier 10.1109/JSTQE.2003.819112


  • Femtosecond laser
  • Optical comb
  • Optical frequency synthesizer
  • Phase locking

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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