High-repetition TDS system

Isao Morohashi*, Takahide Sakamoto, Shingo Saito, Hideyuki Sotobayashi, Tetsuya Kawanishi, Norihiko Sekine, Iwao Hosako, Masahiro Tsuchiya

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We have demonstrated ultrafast optical pulse generation using a Mach-Zehnder-modulator-based flat comb generator (MZ-FCG) and an adiabatic soliton compression technique for terahertz-time-domain-spectroscopy. Our pulse generation technique is very simple configuration and has tunability in the repetition rate and the pulsewidth. The MZ-FCG was driven by two radio-frequency sinusoidal signals. Continuous wave lights led to the MZ-FCG were converted to ultraflat comb signals. The comb signals were formed into picosecond pulse trains by compensating the frequency chirp, and the picosecond pulses were compressed into femtosecond pulses by a dispersion flattened-dispersion decreasing fiber. Pulse trains with 200fs-width were successfully generated.

Original languageEnglish
Pages (from-to)45-52
Number of pages8
JournalJournal of the National Institute of Information and Communications Technology
Issue number1
Publication statusPublished - 2008 Mar 1
Externally publishedYes


  • Dispersion-flattened dispersion-decreasing fiber
  • Mach-zehnder modulator
  • Optical frequency comb
  • Terahertz wave
  • Time-domain spectroscopy

ASJC Scopus subject areas

  • Media Technology
  • Electrical and Electronic Engineering


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