An optical filter for use in or with an optical amplifier

Details An optical filter for use in or with an optical amplifier An optical filter for use in or with an optical amplifier

G - Physics

02

B

G02B 5/20 (2006.01) G02B 5/28 (2006.01) H01S 3/10 (2006.01) H04B 10/17 (2006.01) H04J 14/02 (2006.01) H01S 3/16 (2006.01)

Patent

CA 2279712

This invention relates to a method for filtering and a variable slope optical filter for in-line use with an optical amplifier. 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 a light beam carrying the optical amplifier signal is provided to vary the slope of the filter by means of varying the amplitude wavelength response of the filter.

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