Small line width tunable laser

US5226050A · kind A · utility

Assignee

• Lambda Physik Forschungs - und Entwicklungsgesellschaft - GmbH · DE

Inventor

• Berthold Burghardt · Oettingen, DE

Key dates

• Filing date: Jan 25, 1991
• Grant date: Jul 6, 1993
• Expiry date: Jan 25, 2011

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/213
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

For small line width tuning of a laser, especially a pulsed dye laser, a reference beam is uncoupled from the laser resonator (10,18) and directed to a beam position photosensor such as an adjacent pair of photo diodes. A control signal for synchronizing the movements of a grating (10) and an etalon (18) of the laser resonator is derived from a local change of the reference beam in order that synchronism may be achieved in the movement of both the etalon and the grating.