Synchronization of two different repetition-rate mode-locked laser oscillators for Laser-Compton X-ray generation

T. Yanagida*, Y. Kobayashi, K. Maeda, S. Ito, F. Sakai, K. Torizuka, A. Endo

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


Timing synchronization between two independent Ti:sapphire mode-locked lasers has been developed for Laser-Compton X-ray generation. The lasers operated at different repletion frequencies of 119 MHz and 2856 MHz. The two lasers were actively synchronized with a phase-locked loop at a frequency of 2856 MHz. Fluctuation of the optical sum-frequency intensity was measured, and timing jitter was obtained. The rms timing jitter between the lasers was below 5 fs for several tens of seconds. The fluctuation was measured with a maximum observation bandwidth of 300 kHz. To improve long-time stability, a sum-frequency signal was fed back with a slow loop bandwidth, achieving long time operation for 1 hour with 5 fs synchronization.

Original languageEnglish
Pages (from-to)149-156
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2004
Externally publishedYes
EventFourth-Generation X-Ray Sources and Ultrafast X-Ray Detectors - San Diego, CA, United States
Duration: 2003 Aug 42003 Aug 6


  • Cross-correlation
  • Laser-compton scattering
  • Phase-locked loop
  • Synchronization of mode-locked lasers

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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