Patent ID: 6278814
Filing Date: 2001-08-21
Classification: G02B

Abstract:
An alignment apparatus, comprising:a 1.times.N optical wavelength-division demultiplexer having an input waveguide, a plurality of N output waveguides, and a plurality of alignment waveguides positioned around said input and output waveguides;said 1.times.N optical wavelength-division demultiplexer demultiplexing the signal light and supplying demultiplexed signal light to said N output waveguides, when signal light has wavelengths in a predetermined wavelength region;said 1.times.N optical wavelength-division demultiplexer supplying the signal light to said alignment waveguides, when the signal light has wavelengths not in said predetermined wavelength region;a single optical fiber block having a single optical fiber transmitting the signal light to said 1.times.N optical wavelength-division demultiplexer;a multiple optical fiber block having a plurality of N optical fibers connected to output sides of said N output waveguides, and having alignment optical fibers connected to output sides of said alignment waveguides;a measuring unit measuring intensity of light output from said plurality of alignment optical fibers; anda controller controlling alignment between said single optical fiber block and said plurality of alignment waveguides, and controlling alignment between said plurality of alignment waveguides and said multiple optical fiber block.