Optical module
US8145017B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 2009 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Sep 17, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an optical module, a waveguide unit has a wavelength filter having a ring resonator structure. A semiconductor laser is connected to the input terminal of an input waveguide. A semiconductor Mach-Zehnder modulator is connected to the output terminal of an output waveguide. A first photodiode is connected to the output terminal of a branch waveguide. A second photodiode is connected to the through port of the input waveguide. A temperature adjustment unit adjusts the temperature of the waveguide unit. A laser output controller is connected to the first photodiode and the semiconductor laser to control an output from the semiconductor laser based on an output signal from the first photodiode. A temperature adjustment controller is connected to the second photodiode and the temperature adjustment unit to control the temperature adjustment operation of the temperature adjustment unit based on an output signal from the second photodiode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.