Temperature feedback control for long-term carrier-envelope phase locking
US8228961B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2010 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | May 27, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1636
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A feedback control module for stabilizing a carrier-envelope phase of an output of a laser oscillator system comprises a first photodetector, a second photodetector, a phase stabilizer, an optical modulator, and a thermal control element. The first photodetector may generate a first feedback signal corresponding to a first portion of a laser beam from an oscillator. The second photodetector may generate a second feedback signal corresponding to a second portion of the laser beam filtered by a low-pass filter. The phase stabilizer may divide the frequency of the first feedback signal by a factor and generate an error signal corresponding to the difference between the frequency-divided first feedback signal and the second feedback signal. The optical modulator may modulate the laser beam within the oscillator corresponding to the error signal. The thermal control unit may change the temperature of the oscillator corresponding to a signal operable to control the optical modulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.