A wavelength-tunable optical transmitter using semiconductor optical amplifiers and an optical tunable filter for metro/access DWDM applications

Jun Ichi Kani, Katsumi Iwatsuki

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

This paper proposes and demonstrates a widely tunable and precisely controllable optical transmitter that uses semiconductor optical amplifiers (SOAs) and an optical tunable filter (OTF) for metro/access dense-wavelength-division-multiplexing (DWDM) systems/networks. The transmitter consists of a fiber-ring-laser section based on SOA(s) and an OTF and a modulation section based on an SOA. First, the requirements imposed on the components intended for the fiber-ring laser are clarified through approximate analyses and basic experiments. To obtain low-noise characteristics, the lower limit of effective OTF bandwidth is investigated by considering the SOA carrier lifetime. For obtaining wavelength precision, the upper limit of the effective OTF bandwidth is derived by considering the SOA ripple effect. Next, the proposed transmitter is demonstrated, where all SOAs are integrated into one planar lightwave circuit (PLC) platform using spot-size converting technology. By designing the fiber-ring-laser section according to the clarified requirements, a wavelength control precision of ±1.75 GHz is achieved while realizing the required relative intensity noise (RIN) from 1540 to 1560 nm. Finally, it is demonstrated that the transmitter can handle signals at up to 1.25 Gb/s.

Original languageEnglish
Pages (from-to)1164-1169
Number of pages6
JournalJournal of Lightwave Technology
Volume23
Issue number3
DOIs
Publication statusPublished - 2005 Mar
Externally publishedYes

Keywords

  • Optical transmitters
  • Semiconductor optical amplifiers (SOAs)
  • Wavelength-division multiplexing (WDM)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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