Optical system and method
Adaptive dynamic optical filters with wavelength spreading onto a micromirror array and re-configurable attenuation according to measured intensity as a function of wavelength.
1. A dynamic optical filter, comprising:
a) an input wavelength spreader;
b) an array of micromirrors positioned to reflect radiation from said wavelength spreader; and
c) an output wavelength combiner positioned to receive radiation reflected from said micromirrors;
d) wherein said micromirrors may be adjusted to vary the portion of radiation within a wavelength band reflected towards said output wavelength combiner and said spreader spreads a wavelength band to an oblong area on said micromirror array.
2. The filter of claim 1 , wherein: said spreader spreads adjacent wavelength bands to overlapping areas on said micromirror array.
3. An adaptive dynamic optical filter, comprising:
(a) an input wavelength spreader;
(b) an array of micromirrors positioned to reflect radiation from said wavelength spreader;
(c) an output wavelength combiner positioned to receive radiation reflected from said micromirrors; and
(d) feedback control with input coupled to said output combiner and said output coupled to said array of micromirrors;
(e) wherein said micromirrors may to adjusted to vary the portion of radiation within a wavelength band reflected towards said output wavelength combiner and said feedback control monitors the relative phase as a function of wavelength.
4. An adaptive dynamic optical filter, comprising:
(a) an input wavelength spreader;
(b) an array of micromirrors positioned to reflect radiation from said wavelength spreader;
(c) an output wavelength combiner positioned to receive radiation reflected from said micromirrors; and
(d) feedback control with input coupled to said output combiner and said output coupled to said array of micromirrors;
(e) wherein said micromirrors may to adjusted to vary the portion of radiation within a wavelength band reflected towards said output wavelength combiner and said feedback control monitors the relative group velocity as a function of wavelength.