Patent ID: 6898002
Filing Date: 2005-05-24
Classification: G02B,H01S

Abstract:
1. An optical device, comprising: an optical waveguide type diffraction grating device which has an optical waveguide and a Bragg grating provided in said optical waveguide and which Bragg-reflects with said Bragg grating light having a specific wavelength and propagating through said optical waveguide in a first direction, and transmitting thus reflected light in a second direction opposite to the first direction; a flexible member having a flexibility, said flexible member having said optical waveguide type diffraction grating device secured at a part to which a compressive stress or tensile stress is applied upon bending, said flexible member having a shape which changes the thickness along a longitudinal direction of said flexible member; and first bending means which provides the compressive stress or tensile stress to said optical waveguide type diffraction grating device by bending said flexible member along a first reference axis corresponding to a direction of the thickness changing along the longitudinal direction, to thereby adjust the reflective wavelength in said optical waveguide type diffraction grating device, wherein said first bending means has a structure which secures one end side of said flexible member with a greater thickness, to thereby bend said flexible member by displacing the position of the other end of said flexible member with a smaller thickness along the first reference axis.