Optical filter

Details Optical filter Optical filter

G - Physics

02

B

G02B 5/20 (2006.01) G02B 5/28 (2006.01) H01S 3/10 (2006.01) H04B 10/17 (2006.01) G02B 6/34 (2006.01) H01S 3/16 (2006.01)

Patent

CA 2297538

This invention relates to a variable slope optical filter in the form of a Fabry-Perôt etalon having an end face with a variable finesse. The filter has a wavelength response that is substantially linear in slope within a band of operation wavelengths of the amplifier; the slope of the filter in an operating band of wavelengths is between zero and a only one of a positive or negative number; furthermore the filter has an amplitude response that has an opposite and counter slope as a function of wavelength to that of a gain tilt of the amplifier within the operation band of wavelengths. Relative movement between the filter and an optical beam is provided to vary the slope of the filter by means of varying the amplitude wavelength response of the filter.

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