Numerical demonstration of wavelength-insensitive tuning characteristics of ladder-type tunable filter for a widely tunable laser diode

Seok Hwan Jeong, Shinji Matsuo, Takaaki Kakitsuka, Hiroyuki Suzuki, Yuzo Yoshikuni

Research output: Contribution to journalArticle

Abstract

We propose a wavelength-insensitive tunable ladder-type interferometric filter having a novel configuration for use in a widely tunable laser diode. The spectral characteristics of the proposed device are numerically analyzed and compared with those of our previously reported device regarding transmittance and bandwidth. Wavelength-insensitive tuning and flat-topped filter spectra are obtained by optimizing device parameters. We also discuss the applicability of the proposed ladder filter to a widely tunable laser. The proposed tunable laser has a nearly constant threshold current density with tuning current injection. The oscillation frequency of the laser diode can be stabilized by introducing chirping into the ladder filter to obtain a single passband response. These high-performance spectral characteristics make the proposed device feasible for wavelength- division-multiplexing-based systems.

Original languageEnglish
Pages (from-to)4090-4096
Number of pages7
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number5 A
DOIs
Publication statusPublished - 2006 May 9
Externally publishedYes

Fingerprint

Laser tuning
tunable filters
Ladders
tunable lasers
ladders
Ladder networks
Semiconductor lasers
Demonstrations
Tuning
semiconductor lasers
tuning
filters
Wavelength
wavelengths
Threshold current density
Wavelength division multiplexing
wavelength division multiplexing
threshold currents
Bandwidth
transmittance

Keywords

  • Integrated optics
  • MMI coupler
  • Tunable filter
  • Tunable laser
  • Waveguide device

ASJC Scopus subject areas

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

Cite this

Numerical demonstration of wavelength-insensitive tuning characteristics of ladder-type tunable filter for a widely tunable laser diode. / Jeong, Seok Hwan; Matsuo, Shinji; Kakitsuka, Takaaki; Suzuki, Hiroyuki; Yoshikuni, Yuzo.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 45, No. 5 A, 09.05.2006, p. 4090-4096.

Research output: Contribution to journalArticle

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