Silicon Photonic Wavelength-Tunable Laser Diode with Asymmetric Mach-Zehnder Interferometer

Tomohiro Kita, Keita Nemoto, Hirohito Yamada

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


We fabricated wavelength-tunable laser diodes using a Si photonic wavelength filer that consists of ring resonators and an asymmetric Mach-Zehnder interferometer. The footprint of the optical cavity including the semiconductor optical amplifier is small, 2.6 mm × 0.5 mm, which is about 1/9 of those for tunable laser diodes made of silicon oxynitride. The wavelength could be tuned over approximately 62 nm, which covers the entire L-band of the optical communication wavelength range. The maximum output power reaches 42.2 mW. Furthermore, a spectral line width narrower than 100 kHz was obtained. Such tunable laser diodes with narrow spectral line widths are suitable as light sources integrated into other digital coherent devices.

Original languageEnglish
Article number6690107
JournalIEEE Journal of Selected Topics in Quantum Electronics
Issue number4
Publication statusPublished - 2014 Jul 1


  • digital coherent system
  • Semiconductor laser diode
  • silicon photonics
  • wavelength-tunable laser diode (LD)


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