Tunable narrowband optical parametrical oscillator

US5659419A · kind A · utility

Assignee

• Lambda Physik Gesellschaft zur Herstellung von Larsen GmbH · DE

Inventors

• Peter Lokai · Oettingen, DE
• Uwe Stamm · Göttingen, DE

Key dates

• Filing date: Jul 11, 1995
• Grant date: Aug 19, 1997
• Expiry date: Jul 11, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/39
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A tunable narrowband optical parametrical oscillator (OPO) is excited in pulsed fashion to generate tunable narrowband radiation. A wavelength selective means (T, G) disposed outside the resonant cavity (M3, M4) of the optical parametrical oscillator reduces the bandwidth of the OPO radiation generated. A pumping pulse is divided by a beam splitter (DM1) into at least two partial pulses, and the delay between the two partial pulses is adjusted by means of a delay distance (D) in such a mannner that the first partial pulse will pump the crystal of the optical parametrical oscillator, part of the OPO radiation thus generated passing through the wavelength selective means which is arranged outside the resonant cavity, being coupled back into the resonant cavity, and passing through the crystal (C) once again when the second partial pulse (2) pumps the crystal (C).