The segment type light wave reflector which possesses the Bragg reflected property which is chosen and does not receive the influence of line breadth

摘要

(57) Abstract The goods of the segment type which possesses the Bragg reflected property which for the input wavelength which is chosen is chosen make clear. It has the section which possesses the index of refraction which the contiguity section differs in order these goods consist of and being the section of the optical material which is lined up, the multiple kind of segments where at the same time each segment 1st consists of with the section of the optical material and 2nd the section of the optical material 1 to form super cycle little alternately. The traveling wave to the rear of the synthetic amplitude in the input wavelength where of super cycle as for the segment 1 optical path differs from another segment of that super cycle little, furthermore as for the surface between the sections of super cycle, is chosen is made. In super cycle, the surface of the odd number turn eye which is continued forms the 1st set surface, the surface of the even number turn eye which super cycle continues makes the 2nd set surface. As for this section, (1) when sum concerning the super cyclic section of the product of length of each section in alignment direction and index of refraction of this section, N _z integer, designating as wavelength of the entry wave, as for the surface of tupple of odd number or the even number which the surface which almost is equal to N _z/2, and (2) in super cycle continues, modulus of sum of the synthetic amplitude which was made by this tupple is zero, or in order to become 40% or less of modulus of sum of the synthetic amplitude which was made or by other tupple, interval it can be less crowded. The device where Bragg reflection from the Bragg reflector of this invention is used for the stabilization of laser source is disclosed.