Widely wavelength-tunable DFB laser array integrated with funnel combiner

Hiroyuki Ishii, Kazuo Kasaya, Hiromi Oohashi, Yasuo Shibata, Hiroshi Yasaka, Katsunari Okamoto

Research output: Contribution to journalArticlepeer-review

83 Citations (Scopus)


A wavelength-tunable distributed feedback (DFB) laser array integrated with a funnel combiner is described. Two types of optical combiner, namely a multimode interferometer (MMI) combiner and a funnel combiner, are compared theoretically and experimentally. It is shown that the funnel combiner is superior in terms of wavelength dependence and fabrication tolerance. The laser module covers the full C-band wavelength range (∼38 nm), and a high fiber output power of 40 mW (16 dBm) is obtained with stable single-mode operation.

Original languageEnglish
Pages (from-to)1089-1094
Number of pages6
JournalIEEE Journal on Selected Topics in Quantum Electronics
Issue number5
Publication statusPublished - 2007 Sep
Externally publishedYes


  • Distributed feedback (DFB) lasers
  • Optical fiber communications
  • Optical transmitters
  • Tunable lasers

ASJC Scopus subject areas

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


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