Patent ID: 7268927

Claim:
An optical apparatus comprising: a monolithic optical filter array including a plurality of optical filter elements formed monolithically in a common substrate, said monolithic optical filter array formed of a germanosilicate glass comprising approximately 40 mole % to approximately 80 mole % SiO 2 , approximately 2 mole % to approximately 15 mole % GeO 2 , approximately 10 mole % to approximately 36 mole % B 2 O 3 , approximately 1 mole % to approximately 6 mole % Al 2 O 3 , and approximately 2 mole % to approximately 10 mole % R 2 O, wherein R is an alkali; and at least a thermal element disposed proximate the optical filter elements to thermally change a property of at least one of the optical filter elements, thereby changing a resonant wavelength of the at least one of the optical filter elements.