Semiconductor double-ring-resonator-coupled tunable laser for wavelength routing

Toru Segawa*, Shinji Matsuo, Takaaki Kakitsuka, Tomonari Sato, Yasuhiro Kondo, Ryo Takahashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


A monolithic widely tunable semiconductor laser based on a double-ring resonator is developed for use in a wavelength-routing switch. By using the double-ring resonator as a wavelength-selective filter, operation over a wide wave-length tuning range is achieved with a low tuning current. This low-tuning-current operation makes the laser very promising as a high-speed tunable light source for a wavelength-routing-based switch by effectively suppressing the thermal wavelength drift induced by current injection. In addition, the laser fabrication process is simpler compared to conventional distributed Bragg reflector tunable lasers. A tuning range of 50.0 nm, covering the entire C-band, is successfully demonstrated with an injection current of less than 5.2 mA. The wavelength drift caused by the thermal transients is less than 5 GHz.

Original languageEnglish
Pages (from-to)892-899
Number of pages8
JournalIEEE Journal of Quantum Electronics
Issue number7
Publication statusPublished - 2009
Externally publishedYes


  • Integrated optoelectronics
  • Laser stability
  • Laser tuning
  • Photonic integrated circuits
  • Photonic switching systems
  • Ring resonator
  • Semiconductor lasers
  • Tunable laser
  • Wavelength-routing switch

ASJC Scopus subject areas

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


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