All fiber dynamic optical wavelength switch/filter device

Details All fiber dynamic optical wavelength switch/filter device All fiber dynamic optical wavelength switch/filter device

G - Physics

02

F

G02F 1/01 (2006.01) G02B 6/35 (2006.01) G02F 1/29 (2006.01) G02F 1/313 (2006.01) H04B 10/17 (2006.01) H04J 14/02 (2006.01) G02F 1/21 (2006.01)

Patent

CA 2363806

The optical wavelength switch/filter device controls propagation of an optical signal through first and second optical fibers. A biconical taper is formed of fused and stretched portions of the first and second optical fibers, and Erbium atoms dope at least the biconical taper of the first and second optical fibers. The first optical fiber defines, on a first side of the biconical taper, a first optical signal input supplied with the optical signal. The first and second optical fibers define, on a second side of the biconical taper opposite to the first side, first and second outputs, respectively. The second optical fiber defines, on the first side, a second pump light beam input supplied with a 980-nm pump light beam in order to control a propagation characteristic of the optical signal from the first input to the first and second ouputs through the biconical taper. An additional biconical taper can be formed on the optical fibers to define a Mach-Zehnder fiber interferometer structure.

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