Optical Review

, 4:A80 | Cite as

Multimode optical fiber demultiplexer-star coupler using a single gradient-index-rod lens and a multi-facet grating

  • Takehiro Fukushima
  • Toyokazu Sakamoto
Regular Papers

Abstract

An optical fiber multi-function device consisting of a single gradient-index-rod lens and a multi-facet blazed reflection grating is proposed to simultaneously realize functions of wavelength demultiplexing and optical signal distribution in a multimode optical fiber transmission system. We analyzed the demultiplexing characteristics and the tolerance of optical components using the ray trace method. This device can realize not only low loss optical signal distribution but also offers improved demultiplexing characteristics in comparison with the previously proposed demultiplexer-multiposition switch. The following characteristics are expected from the design using commercially available optical components: a working band of 0.64–0.88 μm, channel separation of 34–36 nm, 3 dB bandwidth of 27–28 nm, channel cross-talk of less than - 40 dB and minimum excess insertion loss of 0.9–2.1 dB.

Key Words

wavelength division multiplexing wavelength demultiplexer optical signal distribution multifunction device optical fiber array gradient-index-rod lens multi-facet grating 

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Copyright information

© The Optical Society of Japan 1997

Authors and Affiliations

  • Takehiro Fukushima
    • 1
  • Toyokazu Sakamoto
    • 1
  1. 1.Department of System Engineering, Faculty of Computer Science and System EngineeringOhayama Prefectural UniversitySoja, OkayamaJapan

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