Tunable narrowband source of a coherent radiation

• Main Authors: KLAFT; INGO, BORNEIS; STEFAN, BERGER; VADIM, STAMM; UWE, LOKAI; PETER
• Format: Patent
• Language: English
• Published: 02.09.1997
• Edition: 6
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

A tunable narrowband source of a coherent radiation, comprising a first optical parametric oscillator (OPO1) which includes at least one first optical parametric amplifier medium (K1) in a resonator (18, 20; 20, 34) or an optical parametric generator; at least one second optical parametric oscillator (OPO2) which includes at least one second optical parametric amplifier medium (K2) in a resonator (22, 24) and into which is coupled the output radiation (28; 28b) of the first optical parametric oscillator (OPO1); 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 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 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 third optical parametric amplifier medium (K3, K4) and amplified therein.