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Journal ArticleDOI

Optical demultiplexer for a wavelength division multiplexing system

Koh-ichi Aoyama, +1 more
- 15 Apr 1979 - 
- Vol. 18, Iss: 8, pp 1253-1258
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TLDR
The experimental results of a demultiplexer using a diffraction grating for a wavelength division multiplexing (WDM) system, which transmits signals with different wavelengths by means of a single optical fiber, are described.
Abstract: 
A wavelength division multiplexing (WDM) technique, which transmits signals with different wavelengths by means of a single optical fiber, can increase the capacity of optical fiber transmission systems. This paper describes the experimental results of a demultiplexer using a diffraction grating for a WDM system. The insertion loss of the demultiplexer could be decreased by using a large core output fiber, an Au-coated diffraction grating, and small aberration lenses. There were five channels in the 0.8-μm wavelength region. Wavelength spacing was 200 A. Insertion loss for each channel was about 2 dB, and cross talk was <−30 dB.

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Patent

Optical wavelength division multiplexing/demultiplexing system

Robert G. Hunsperger, +1 more
TL;DR: In this paper, a periodic radiation transmissive diffraction grating incorporating radiation reflecting elements in spaced array, preselected, in demultiplexing service, is employed to separate into individual entities an optical signal input constituting a multiplicity of coherent radiation signals.
Patent

Integrated bi-directional axial gradient refractive index/diffraction grating wavelength division multiplexer

Robert H. Dueck, +3 more
TL;DR: In this article, the authors proposed a wavelength division multiplexer that integrates an axial gradient refractive index element with a diffraction grating to provide coupling from a plurality of input optical sources (each delivering a single wavelength) which are multiplexed to a single polychromatic beam for output to an output optical receiver.
Patent

Compact double-pass wavelength multiplexer-demultiplexer having an increased number of channels

Shu Zhang, +1 more
TL;DR: An optical multiplexing and demultiplexing device includes: a plurality of optical fibers each terminating in a fiber end for radiating and receiving corresponding light beams; a fiber mounting assembly configured to support the optical fibers so that the fiber ends terminate in substantially the same plane, the mounting assembly also being configured to position the fibers in a regular array of N rows and M columns as mentioned in this paper.
Journal ArticleDOI

Optical demultiplexer using a silicon echelette grating

Y. Fujii, +2 more
- 01 Feb 1980 - 
TL;DR: In this paper, an echelette grating is fabricated on a silicon surface by anisotropic etching for a five channel demultiplexer using this grating for a wavelength-division-multiplexing system.
Patent

High channel density, broad bandwidth wavelength division multiplexer with highly non-uniform Bragg-Littrow holographic grating

Tomasz P. Jannson, +3 more
TL;DR: In this article, a volume non-uniform holographic dispersion grating is used to record the Bragg plane sets recorded in the grating, which enables operation of the multiplexer or other devices that act on light waves according to wavelength over nearly the full usable 0.8-1.3 μm wavelength range.