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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 24, Iss. 21 — Nov. 1, 1999
  • pp: 1466–1468

Loop-mirror filters based on saturable-gain or-absorber gratings

Steven A. Havstad, Baruch Fischer, Alan E. Willner, and Michael G. Wickham  »View Author Affiliations


Optics Letters, Vol. 24, Issue 21, pp. 1466-1468 (1999)
http://dx.doi.org/10.1364/OL.24.001466


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Abstract

We present a novel all-fiber narrow-band filter based on pump-induced saturable-gain or-absorber gratings in a loop mirror. Our design provides built-in interferometric phase alignment of the signal to the grating for optimal filtering. Notch or bandpass functionality is determined by the choice of gain or absorption and the input ports selected for the pump and signal. The loop-mirror filter has potential bandwidths from the submegahertz to beyond the gigahertz regimes, and one can tune it optically by changing the wavelength of the pump light that establishes the grating. Such filters have potential applications to wavelength-division-multiplexed optical networks and optical rf signal processing.

© 1999 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2340) Fiber optics and optical communications : Fiber optics components
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(350.2770) Other areas of optics : Gratings

Citation
Steven A. Havstad, Baruch Fischer, Alan E. Willner, and Michael G. Wickham, "Loop-mirror filters based on saturable-gain or-absorber gratings," Opt. Lett. 24, 1466-1468 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-21-1466

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