Differential processing using an arrayed-waveguide grating

Hirokazu Takenouchi, Hiroyuki Tsuda, Chikara Amano, Takashi Gohtf, Katsunari Okamotq, Takashi Kurokawa

Research output: Contribution to journalArticlepeer-review


Y This paper reports on time-space conversionbased differential processing of optical signals using a highresolution arrayed-waveguide grating (AWG) and a spatial filter at a wavelength of 1.55jim. We clarify the advantages of the AWG device and show where it is applicable. In order to reduce loss at the spatial filter, we propose a new phase-only filter that functions as a differential filter. The difference between the exact differential filter and the proposed phase-only filter is calculated theoretically. We confirm experimentally that the optical pulse can be differentiated by the proposed filter. For application of differential processing, we also proposed a phase modulation to amplitude modulation (PM-AM) conversion and demonstrated the PM-AM conversion at 10Gbit/s signals using a PSK-nonreturn-to-zero (NRZ) format.

Original languageEnglish
Pages (from-to)1518-1523
Number of pages6
JournalIEICE Transactions on Electronics
Issue number8
Publication statusPublished - 1999
Externally publishedYes


  • Arrayed-waveguide grating
  • Differential processing
  • Optical fiber communication
  • Optical signal processing
  • Ultrafast optical pulse

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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