Multi-functional optical signal processing using optical spectrum control circuit

Shuhei Hayashi, Tatsuhiko Ikeda, Takayuki Mizuno, Hiroshi Takahashi, Hiroyuki Tsuda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Processing ultra-fast optical signals without optical/electronic conversion is in demand and time-to-space conversion has been proposed as an effective solution. We have designed and fabricated an arrayed-waveguide grating (AWG) based optical spectrum control circuit (OSCC) using silica planar lightwave circuit (PLC) technology. This device is composed of an AWG, tunable phase shifters and a mirror. The principle of signal processing is to spatially decompose the signal's frequency components by using the AWG. Then, the phase of each frequency component is controlled by the tunable phase shifters. Finally, the light is reflected back to the AWG by the mirror and synthesized. Amplitude of each frequency component can be controlled by distributing the power to high diffraction order light. The spectral controlling range of the OSCC is 100 GHz and its resolution is 1.67 GHz. This paper describes equipping the OSCC with optical coded division multiplex (OCDM) encoder/decoder functionality. The encoding principle is to apply certain phase patterns to the signal's frequency components and intentionally disperse the signal. The decoding principle is also to apply certain phase patterns to the frequency components at the receiving side. If the applied phase pattern compensates the intentional dispersion, the waveform is regenerated, but if the pattern is not appropriate, the waveform remains dispersed. We also propose an arbitrary filter function by exploiting the OSCC's amplitude and phase control attributes. For example, a filtered optical signal transmitted through multiple optical nodes that use the wavelength multiplexer/demultiplexer can be equalized.

Original languageEnglish
Title of host publicationIntegrated Optics
Subtitle of host publicationDevices, Materials, and Technologies XIX
EditorsJean-Emmanuel Broquin, Gualtiero Nunzi Conti
PublisherSPIE
ISBN (Electronic)9781628414554
DOIs
Publication statusPublished - 2015
EventIntegrated Optics: Devices, Materials, and Technologies XIX - San Francisco, United States
Duration: 2015 Feb 92015 Feb 11

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9365
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherIntegrated Optics: Devices, Materials, and Technologies XIX
CountryUnited States
CitySan Francisco
Period15/2/915/2/11

Keywords

  • amplitude and phase control
  • arrayed-waveguide grating
  • optical signal processing
  • optical waveguide
  • silica based planar lightwave circuit
  • time-to-space conversion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Hayashi, S., Ikeda, T., Mizuno, T., Takahashi, H., & Tsuda, H. (2015). Multi-functional optical signal processing using optical spectrum control circuit. In J-E. Broquin, & G. N. Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies XIX [936519] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9365). SPIE. https://doi.org/10.1117/12.2076696