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