Multistage synchronization of pulsed radiation sources

US6831935B2 · kind B2 · utility

Assignee

• The Regents of the University of Colorado · US

Inventors

• Jun Ye · Shanghai, CN
• Henry C. Kapteyn · Boulder, US
• John L. Hall · Tracy, US
• Robert K. Shelton · Stillwater, US
• Margaret M. Murnane · Boulder, US
• Long Ma · Boulder, US

Key dates

• Filing date: Mar 29, 2002
• Grant date: Dec 14, 2004
• Expiry date: Apr 12, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/1394
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Accurate and efficient synchronization of two pulsed radiation sources (e.g. iwo mode locked lasers) is accomplished in stages. Rough synchronization is accomplished by synchronizing (for example) the fundamental repetition rate of the two lasers. Fine synchronization is accomplished by synchronizing high harmonics of the two lasers. More accurate synchronization may be accomplished by adding more stages, by utilizing light out of a nonlinear laser in which the two beams are crossed, or by utilizing heterodyne beats of the two laser beams. A dc offset signal may added to the control signal generated by the synchronization stages.