Optical: systems and elements – Light interference
Patent
1997-10-10
1999-10-26
Spyrou, Cassandra
Optical: systems and elements
Light interference
359615, 359629, 359839, G02B 504, G02B 2700
Patent
active
059738383
ABSTRACT:
An apparatus which combines a virtually imaged phased array (VIPA) with a demultiplexer, to provide a large bandwidth, high resolution wavelength demultiplexer. Generally, a VIPA is a device which receives an input light having a respective wavelength within a continuous range of wavelengths, and causes multiple reflection of the input light to produce self-interference and thereby form an output light. The output light is spatially distinguishable from an output light formed for an input light having any other wavelength within the continuous range of wavelengths. The apparatus combines the VIPA with a demultiplexer, such as a diffraction grating. More specifically, the VIPA receives an input light and produces a corresponding output light propagating away from the VIPA. The output light includes a plurality of different wavelength components. The demultiplexer demultiplexes the output light into a plurality of separated lights corresponding, respectively, to the plurality of different wavelength components in the output light. Preferably, the demultiplexer has a dispersion direction which is substantially perpendicular to the dispersion direction of the VIPA. In this case, the separated lights from the demultiplexer can be detected with fibers arranged in a grid pattern.
REFERENCES:
patent: 2534846 (1950-12-01), Ambrose et al.
patent: 3647285 (1972-03-01), Harvey et al.
patent: 3832030 (1974-08-01), Gloge
patent: 4257673 (1981-03-01), Matthijsse
patent: 4362361 (1982-12-01), Campbell et al.
patent: 4655547 (1987-04-01), Heritage et al.
patent: 4820019 (1989-04-01), Yoshida et al.
patent: 5071225 (1991-12-01), Inoue
patent: 5119454 (1992-06-01), McMahon
patent: 5166818 (1992-11-01), Chase et al.
patent: 5309456 (1994-05-01), Horton
patent: 5583683 (1996-12-01), Scobey
patent: 5666195 (1997-09-01), Shultz et al.
patent: 5715095 (1998-02-01), Hiratsuka et al.
patent: 5786915 (1998-07-01), Scobey
M. Shirasaki, Large Angular-Dispersion By Virtually-Imaged Phased-Array (VIPA) and Its Application to Wavelength Demultiplexing, MOC '95, Hiroshima, Oct. 1995.
M. Shirasaki, Large Angular Dispersion by a Virtually-Imaged Phased Array and its Application to a Wavelength Demultimplexer, Optics Letters, vol. 21, No. 5, Mar. 1996.888
M. Shirasaki, Temperature Independent Interferometer For WDM Filters, Paper WeD.1.6 ECOC '96 (European Conference on Optical Communication), Sep. 18, 1996.
M. Shirasaki, Filtering Characteristics of Virtually-Imaged Phased Array, Presented at IPR (Integrated Photonics Research) Topical Meeting Paper IMC3, Apr. 29, 1996, Boston, MA.
W. H. Fincham & M. H. Freeman, Optics, Ninth ed., Butterworth (Publishers), Inc., Boston .sctn. .sctn. 14.7 & 14.14, Jan. 1980.
Fujitsu Limited
Jr. John Juba
Spyrou Cassandra
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