The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 2017
Filed:
Oct. 20, 2016
Mitsubishi Electric Corporation, Tokyo, JP;
Kazuhisa Takagi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An optical module includes: a semiconductor laser emitting laser light; an optical device having a butt joint interface; an optical amplifier amplifying the laser light passed through the optical device; an equivalent resonator length adjustor inserted between the optical amplifier and the optical device; a wavelength spectrum measuring device measuring a wavelength of light output from the optical amplifier; and a refractive index adjustment circuit controlling a current applied to the equivalent resonator length adjustor based on a result of measurement performed by the wavelength spectrum measuring device to adjust a refractive index of the equivalent resonator length adjustor. Parasitic oscillation light in a plurality of Fabry-Perot modes is generated as the butt joint interface is one of reflection ends. The refractive index adjustment circuit adjusts the refractive index so that none of peak wavelengths of the parasitic oscillation light coincides with an oscillation wavelength of the semiconductor laser.