Tunable add/drop optical filter providing arbitrary channel arra

Details Tunable add/drop optical filter providing arbitrary channel arra Tunable add/drop optical filter providing arbitrary channel arra

1994-12-28

1996-10-15

Boudreau, Leo

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359128, 359130, H04J 1402

Patent

active

055660142

ABSTRACT:
A novel add/drop optical filter providing arbitrary channel arrangements between two input WDM signals and two output WDM signals is presented. The device consists of two WGR's connected by a plurality of 2.times.2 optical switches and 3 db coupling devices in each WGR branch. Through use of the inventive device, the second of the two input WDM signals can be added to the transmission path, while the second of the two output WDM signals is dropped. The added and dropped signals are of the same frequency, but can carry different information. The same circuit can also be used as a 2.times.2 wavelength-space switch for WDM signals. In both cases N.sup.2 channel arrangements between the two outputs are possible when the two input signals each support N channels.

REFERENCES:
patent: 5136671 (1992-08-01), Dragone
patent: 5339157 (1994-08-01), Glance et al.
patent: 5367586 (1994-11-01), Glance et al.
Journal of Lightwave Technology, vol. II, No. 5/6, May/Jun. 1993 "A Precompetitive Consortium on Wide-Band All-Optical Networks".
IEEE Journal on Selected Areas in Communications, vol. 8, No. 6, Aug. 1990, "Acoustooptic Tunable Filters in Narrowband WDM Networks: System Issues and Network Applications".

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