Tunable narrowband source of a coherent radiation

US5663973A · kind A · utility

Assignee

• Lambda Physik Gesellschaft zur Herstellung von Larsen GmbH · DE

Inventors

• Uwe Stamm · Göttingen, DE
• Ingo Klaft · Göttingen, DE
• Vadim Berger · Oebisfelde, DE
• Stefan Borneis · Fulda, DE
• Peter Lokai · Oettingen, DE

Key dates

• Filing date: Jun 10, 1996
• Grant date: Sep 2, 1997
• Expiry date: Jun 10, 2016

Classification

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

Abstract

A tunable narrowband source of a coherent radiation, comprising PA0 a first optical parametric oscillator (OPO1) which includes at least one first optical parametric amplifier medium (K.sub.1) in a resonator (18, 20; 20, 34) or an optical parametric generator; PA0 at least one second optical parametric oscillator (OPO2) which includes at least one second optical parametric amplifier medium (K.sub.2) in a resonator (22, 24) and into which is coupled the output radiation (28; 28b) of the first optical parametric oscillator (OPO1); PA0 at least one third optical parametric amplifier medium (OPA) into which is coupled the output radiation (30) of the second optical parametric oscillator (OPO2); and PA0 means (12, 14, 16, 26) for generating and coupling the pump radiation (10, 10') into the first and second optical parametric oscillators (OPO1, OPO2) and into the third optical parametric amplifier medium OPA), wherein PA0 the output radiation (28; 28b) of the first optical parametric oscillator (OPO1) which is coupled into the second optical parametric oscillator (OPO2) has a bandwidth which is smaller than the spacing of the only one longitudinal mode is excited and coupled into the th…