Mitsubishi Electric Corporation

Masaya Shimono

Hidekazu Kodera

Yoshiya Sato

Tadayoshi Hata

Daichi Koyama

The present invention relates to a manufacturing method for an optical multiplexer provided with: a substrate having a first main surface and a second main surface that are parallel to each other; a mirror disposed on the first main surface; and an optical filter disposed on the second main surface. This method includes: a step for placing the mirror on the first main surface of the substrate, performing angular adjustment between the substrate and the mirror using an autocollimator, and then fixing the mirror to the substrate; and a step for placing the optical filter on the second main surface of the substrate, performing angular adjustment between the substrate and the optical filter using the autocollimator, and then fixing the optical filter to the substrate.

Method of manufacturing an optical multiplexer

An optical axis adjustment method for an integrated optical module includes: measuring output currents by changing a wavelength of a light beam incident on a package; detecting, with first and second light receiving elements, light beams resulted from demultiplexing the incident light beam with first and second filters; detecting center wavelengths of a first light beam and a second light beam based on a change in the output currents in response to a change in the wavelength of the incident light beam; comparing the center wavelengths of the first light beam and the second light beam with design transmission wavelengths of the first filter and the second filter, and defining respective differences as a first wavelength deviation and a second wavelength deviation; and adjusting a position of the optical demultiplexer to make a total sum of the first wavelength deviation and the second wavelength deviation small.

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Tokyo, Japan

Masaya Shimono