摘要:
Die Erfindung betrifft ein Lasereinrichtung (1) mit einem Halbleiterlasermaterial (14) zur Erzeugung von Licht einer ersten Wellenlänge, wobei das Halbleiterlasermaterial (14) zur Erzeugung von Licht der ersten Wellenlänge lösbar in die Lasereinrichtung (1) integriert ist, wobei der Lasereinrichtung (1) ein Halbleiterlasermaterial (140) zur Erzeugung von Licht einer zweiten Wellenlänge zugeordnet ist, und wobei das Halbleiterlasermaterial (14) zur Erzeugung von Licht der ersten Wellenlänge durch das Halbleiterlasermaterial (140) zur Erzeugung von Licht der zweiten Wellenlänge austauschbar ist. Eine Quantenkaskaden-Laserdiode (14,140) befindet sich in einem externem Resonator mit einem Beugungsgitter (19) auf einem Drehtisch (17) zur Wellenlängenselektion. Ein Parabolspiegel (15) erzeugt ein paralleles Bündel zur Ausleuchtung des Gitters (19). Nach Auswechslung der Laserdiode (14,140) wird der Resonator mit Hilfe des 6-Achsen Verstellers (16) und dem Positionierer (18) neu ausgerichtet. Das Ausgangsbündel wird mit Hilfe einer Linse (20) kollimiert, letztere befindet sich ebenfalls auf einem 6-Achsen Positionierer (21).
摘要:
Feedback from a power monitor sampling a portion of the output beam of an optical resonator is used to control the position of a pump beam relative to a second laser. The pump beam position or orientation is adjusted in response to a dither signal imposed on the position or tilt of an external optic or mirror in order to maximize the efficiency of the second laser in converting pump power to output power. Feedback based on the response of the power monitor is used to control the position or tilt of the mirror or optic to which the dither was applied.
摘要:
A laser-based method and apparatus for corneal surgery. The present invention is intended to be applied primarily to ablate organic materials, and human cornea in particular. The invention uses a laser source which has the characteristics of providing a shallow ablation depth (0.2 microns or less per laser pulse), and a low ablation energy density threshold (less than or equal to about 10 mJ/cm ), to achieve optically smooth ablated corneal surfaces. The preferred laser includes a laser (102) emitting approximately 100-50,000 laser pulses per second, with a wavelength of about 198-300 nm and a pulse duration of about 1-5,000 picoseconds. Each laser pulse is directed by a highly controllable laser scanning system (104).
摘要翻译:一种基于激光的角膜手术方法和装置。 本发明旨在主要用于消融有机材料,特别是人角膜。 本发明使用具有提供浅消融深度(每个激光脉冲0.2微米或更小)和低消融能量密度阈值(小于或等于约10mJ / cm 2)的特征的激光源, 实现光学平滑的消融角膜表面。 优选的激光器包括每秒发射大约100-50,000个激光脉冲的激光器(102),波长约为198-300nm,脉冲持续时间约为1-5,000皮秒。 每个激光脉冲由高度可控的激光扫描系统(104)引导。
摘要:
L'invention concerne un système laser comprenant une source (10) pour générer un signal source (100) et un système amplificateur optique (30, 31, 32, 33). Selon l'invention, le système laser comporte un dispositif de sélection ou de modulation d'impulsions (20) configuré pour sélectionner ou moduler le signal source (100) de manière à former un signal principal (120) constitué d'une ou plusieurs impulsions lumineuses, le signal principal étant modulé temporellement en cadence et/ou en amplitude, le système laser étant configuré pour injecter le signal principal (110) et un signal secondaire (120) dans ledit système amplificateur optique (30), le signal secondaire (120) étant modulé en fonction de la modulation temporelle en cadence et/ou en amplitude du signal principal (110), de manière à stabiliser l'énergie stockée dans le système amplificateur optique (30) en fonction du temps, et le système laser étant configuré pour séparer spatialement le signal principal amplifié (310) du signal secondaire amplifié (320).
摘要:
An array of Surface Emitting Laser (SEL) elements can be used to efficiently pump a disk or rod of solid-state laser glass or crystal, or harmonic-generating crystal. Placing the laser array chip against or near the surface of this solid-state material provides very high and uniform optical power density without the need for lenses or fiber-optics to conduct the light from typical edge-emitting lasers, usually formed in a stack of bars. The lasers can operate in multi-mode output for highest output powers. Photolithography allows for an infinite variety of connection patterns of sub-groups of lasers within the array, allowing for spatial contouring of the optical pumping power across the face of the solid-state material. The solid-state material may be pumped either within (intra-cavity) or externally (extra-cavity) to the SEL laser array.
摘要:
The invention relates to a laser device, comprising a laser material (1) brought into a simmer mode. A controllable source (7, 17) of additional energy (16, 20) supplies energy to the laser material (1), such that in only a desired part of the laser material (1) a lasing threshold is exceeded, and a laser beam (10) is emitted from only a desired part of the laser surface. This device makes possible to provide a laser beam in just the desired part of the laser, which allows a flexible and localized output. The invention further relates to a hair- removing device comprising a laser device according to the invention and further comprising an optical system(6) for focusing the laser beam pulses on a focal spot (12) and for positioning the focal spot in a target position, wherein the optical system (6) comprises a movable lens or a plurality of individually addressable lenses.
摘要:
Le dispositif de déflexion de faisceau laser et à cristal non-linéaire de conversion de longueur d'onde est caractérisé en ce qu'il comporte, dans une cavité optique (2-3), un dispositif de déflexion à obturateur (6), et un cristal de conversion de fréquence (4) disposé sur le point de passage (5) de tous les faisceaux intra-cavité à agilité angulaire.
摘要:
The disclosure is directed to a laser amplifier system utilizing a pair of scanning mirrors (28, 44) driven in tandem by piezo actuators (29). A low power laser beam (13) is directed between the pair of scanning mirrors (28, 44). Each bounce of the laser beam (13) between the mirrors (28, 44) discretely increases the power of the beam and changes the angle of exit of the beam from the amplifier providing for precise angular beam exit control.
摘要:
An optical beam steering device (10) incorporates a laser (12), three Brillouin shifters (22 to 26, 44 to 48, 54 to 58), a four wave mixing cell (40) and a low power beam steering device (62). The first shifter (22 to 26) and the mixing cell (40) contain TiCl 4, and the other shifters (44 to 48, 54 to 58) contain 20 % CCl4/80 % CS2. The first and third shifters (22 to 26, 54 to 58) frequency downshift the laser beam (16) by delta nu A and delta nu B respectively. Light (16') from the first shifter (22 to 26) is amplified and provides a first pump beam input to the mixing cell (40). It then passes to the second shifter (44 to 48), for frequency downshifting by delta nu B and returns as a second cell pump beam (16''). Light (18') from the third shifter (54 to 58) passes via the low power beam steering device (62) to the cell (40) as a weak input signal beam (18''). The cell (40) responds to the pump beams (16', 16'') and signal beam (18'') by generating a high power beam (68) which is a phase conjugate of the signal beam (18'') and retraces part of its steered path.
摘要翻译:光束转向装置(10)包括激光器(12),三个布里渊变换器(22至26,44至48,54至58),四波混频电池(40)和低功率光束转向装置(62) 。 第一移位器(22至26)和混合单元(40)包含TiCl 4,另一个移位器(44至48,54至58)含有20%CCl4 / 80%CS2。 第一和第三移位器(22至26,54至58)分别对激光束(16)进行频率降低delta nu A和delta nu B。 来自第一移位器(22至26)的光(16')被放大并提供输入到混合单元(40)的第一泵浦光束。 然后,它传递到第二移位器(44至48),用于通过delta nu B进行频率降档,并作为第二单元泵浦光束(16“)返回。 来自第三移位器(54至58)的光(18')作为弱输入信号光束(18“)通过低功率光束转向装置(62)传送到小区(40)。 电池(40)通过产生高功率光束(68)来响应泵浦光束(16',16“)和信号光束(18”),高功率光束(68)是信号光束(18“)和 回溯其转向路径的一部分。