Tunable semiconductor laser system
US6321003A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2000 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Oct 10, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/18366
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multiplexer for a wavelength division multiplexed optical communication system includes an optical circulator with at least first, second, third and fourth circulator ports. An optical fiber with a first optical transmission path is coupled to the first circulator port and carries a wavelength division multiplexed optical signal that includes signals .sub.1-n. A second optical transmission path is in optical communication with the second circulator port. A first laser is coupled to the second optical transmission path. The first laser reflects the .sub.1-n signals and adds a signal .sub.n+1. A control loop is coupled to the first laser. In response to a detected change in temperature the control loop sends a signal to adjust a voltage or current supplied to the first laser and provide a controlled frequency and power of an output beam. A third optical transmission path is in optical communication with the third circulator port and transmits the signals .sub.1-n and the signals .sub.n+1 that are received from the optical circulator. A fourth optical transmission path is in optical communication with the fourth optical circulator port. The fourth optical transmission path is positi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.