Optical switch

Details Optical switch Optical switch

1996-01-18

1996-12-10

Ngo, John

Optical waveguides

With optical coupler

Switch

372 6, 372 42, 385141, G02B 626

Patent

active

055839576

ABSTRACT:
An optical switch includes a dual-core optical fibre coupler having waveguides which are erbium doped, silica-based fibre amplifiers. The waveguides are pumped by pump lasers which are used to control the mean differential gain of the waveguides to be zero or a first value at which two values the linear coupler is a cross-coupler or a through-coupler at an operating wavelength.

REFERENCES:
patent: 4546476 (1985-10-01), Shaw et al.
patent: 4553238 (1985-11-01), Shaw et al.
patent: 4938561 (1990-07-01), Grasso et al.
patent: 5136670 (1992-08-01), Shigematsu et al.
patent: 5268910 (1993-12-01), Huber
Thompson, "Analysis of Optical Directional Couplers That Include Gain or Loss and Their Application to Semiconductor Slab Dielectric Guides", Journal of Lightwave Technology, vol. LT-4, No. 11, Nov. 1986, pp. 1678-1693.
Setterlind et al, "Directional Coupler Switches with Optical Gain", IEEE Journal of Quantum Electronics, vol. QE-22, No. 5, May, 1986, pp. 595-602.
Gershoig et al, "Optical Characteristics of Devices with Coupled Waveguides Utilizing Semiconductor Heterostructures", Sov. J. Quantum Electron, 16(12), Dec. 1986, pp. 1621-1624.
Friberg et al, "Femotosecond Switching in a Dual-Core-Fiber Nonlinear Coupler", Optics Letters, 13 (1988) Oct., No. 10, New York, USA, pp. 904-906.

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