Sub-microsecond wavelength stabilization of tunable lasers with the internal wavelength locker

Ryoga Kimura, Yudai Tatsumoto, Kazuki Sakuma, Hirokazu Onji, Makoto Shimokozono, Hiroyuki Ishii, Kazutoshi Kato

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We proposed a method of accelerating the wavelength stabilization after wavelength switching of the tunable distributed amplification-distributed feedback (TDA-DFB) laser using the internal wavelength locker to reduce the size and the cost of the wavelength control system. The configuration of the wavelength stabilization system based on this locker was as follows. At the wavelength locker, the light intensity after an optical filter is detected as a current by the photodiodes (PDs). Then, for estimating the wavelength, the current is processed by the current/voltage-converting circuit (IVC), logarithm amplifier (Log Amp) and field programmable gate array (FPGA). Finally, the laser current is tuned to the desired wavelength with reference to the estimated wavelength. With this control system the wavelength is stabilized within 800 ns after wavelength switching, which is even faster than that with the conventional control system.

Original languageEnglish
Article number08RB07
JournalJapanese journal of applied physics
Issue number8
Publication statusPublished - Aug 2016

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)


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