Patent ID: 6018602
Filing Date: 2000-01-25
Classification: H01S,H04B

Abstract:
A quantum-optical amplifier embodied as an optical waveguide which can be operated in space,comprising an optical waveguidewhereinthe light to be amplified by an amplifier moves in both directions through said optical waveguide,one end of said optical waveguide is covered by a layer which acts reflectively on the light to be amplified, but lets pump light pass without reflecting it,the reflection of the light to be amplified is accompanied by a polarization rotation of 90.degree. caused by a Faraday rotator,the Faraday rotator is provided by windings of said optical waveguide or by conducting a portion of said optical waveguide through a magnetic field, wherein said Faraday rotatorhas a polarization-selective, fiber-optical coupler for separating light to be amplified, which flows into and out of said amplifier.