Method and apparatus to control output spectrum bandwidth of MOPO or MOPA laser
US7894494B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2008 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Dec 27, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus and method which may comprise a seed laser defining an optical cavity producing an output. An amplifier may amplify the seed laser output. A bandwidth error signal generator may provide a bandwidth error signal from measured bandwidth and a target. A bandwidth selection element, which may comprise an adjustable sized aperture external to the cavity of the seed laser may selectively alter the bandwidth of the seed laser output. A bandwidth control system may control the bandwidth control element and also selectively adjust a differential firing time between the seed laser and amplifier or another bandwidth selection actuator to cooperated (coarsely or finely) with the bandwidth selection element to control bandwidth of the laser system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.