Patent ID: 6483631
Filing Date: 2002-11-19
Classification: H01S,H04B

Abstract:
A spectral tilt controller for use in an optical amplifier that amplifies light in a signal band on a fiber-optic communications link, comprising:a fiber input to which the light is provided; a filter element that spectrally filters the light from the fiber input; a fiber output to which the spectrally filtered light is provided; and an actuator that adjusts the position of the filter element, wherein the spectral tilt characteristics of the filter element in the signal band vary as a function of position on the filter element, so that different amounts of spectral tilt are produced by the tilt controller as the actuator adjusts the position of the filter element, wherein the actuator comprises a stepper motor and wherein the filter element comprises a glass substrate that is linearly positioned using the actuator.