Analog and digital optical pulse synthesizers using arrayed-waveguide gratings for high-speed optical signal processing

Hiroyuki Tsuda, Yosuke Tanaka, Tatsutoshi Shioda, Takashi Kurokawa

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)

Abstract

In this paper, analog and digital optical pulse synthesizers using high-resolution arrayed-waveguide gratings (AWG) have been developed. The analog type of optical synthesizer consists of an AWG with an integrated 45°, curved-surfaced mirror, a 4-f lens system, and an optically addressable spatial light modulator. The effective frequency resolution is 14.5 GHz. A dispersion compensation experiment is successfully carried out and a transform-limited short pulse has been obtained. This digital type of optical synthesizer comprises 30 frequency separated channels with a spacing of 12.5 GHz, where each channel includes an amplitude modulator and a phase modulator. The rectangular-shaped pulse is generated with this pulse synthesizer, together with a 12.5-GHz-spacing, optical frequency comb. The synthesizer can generate an optical pulse with any waveform. Moreover, using periodic characteristics of the pulse synthesizer, a 250-GHz repetition rate pulse train was generated, in combination with an ultrawideband, waveguide type of Fabry-Perot electrooptic modulator.

Original languageEnglish
Pages (from-to)670-677
Number of pages8
JournalJournal of Lightwave Technology
Volume26
Issue number6
DOIs
Publication statusPublished - 2008 Mar 15

Keywords

  • Frequency synthesizers
  • Optical signal processing
  • Optical waveguide
  • Signal generators

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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