FREQUENCY DOUBLED ND: YAG LASER WITH YELLOW LIGHT OUTPUT

• Main Authors: HUNZIKER, LUKAS, FRANGINEAS, GEORGE
• Format: Patent
• Language: English; French
• Published: 14.03.2002
• Edition: 7
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; BASIC ELECTRIC ELEMENTS; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; DEVICES USING STIMULATED EMISSION; DIAGNOSIS; ELECTRICITY; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; SURGERY; TREATMENT OR PROTECTION OF EYES OR EARS

A diode-laser-pumped resonator (20) including ari Nd:YAG gain element (30), is arranged to generates fundamental radiation having a wavelength which is one of about 1123 nm, 1116 nm, and 1112 nm. The resonator further includes an optically non-linear crystal (32), which is arranged to frequency-double the fundamental radiation. This will provide second harmonic radiation having a wavelength which is correspondingly one of 562nm, 558 nm, or 556 nm. The resonator may also comprise a wavelength-selective device (34), such as an etalon. Dans cette invention, un résonateur (20) pompé par une diode laser, comportant un élément à gain Nd-YAG (30), émet un rayonnement fondamental dont la longueur d'onde correspond à environ 1123 nm, 1116 nm, et 1112 nm. Ce résonateur comprend également un cristal optiquement non linéaire (32), servant à doubler la fréquence du rayonnement fondamental. Ceci permet d'obtenir un rayonnement de deuxième harmonique dont la longueur d'onde correspond à 562nm, 558 nm, ou 556 nm. Ce résonateur peut également comprendre un dispositif à sélection de longueur d'onde (34), notamment un étalon.