Patent ID: 6834142
Filing Date: 2004-12-21
Classification: G02B

Abstract:
An optical filter comprising:an optical waveguide having outer dimensions along perpendicular longitudinal and transverse directions, the waveguide including: an outer cladding having a core disposed therein, wherein a filter portion of the waveguide having an outer dimension in the transverse direction is greater than 0.3 mm; and a slanted grating imparted in the filter portion of the waveguide for selectively attenuating a received optical input signal to provide an optical output signal having a desired filter profile; at least a portion of the filter portion of the waveguide having a transverse cross-section that is continuous and comprises substantially the same material; wherein the slanted grating is longitudinally strain compressed so as to change the filter profile without buckling the waveguide in the transverse direction thereby tuning the optical filter.