Abstract:
This invention suppresses transverse oscillations in solid-state, single-crystal or ceramic laser amplifiers by employing a native-material, solid-state, index-matched cladding containing appropriate absorbers.
Abstract:
The present invention is related to methods of packaging optical nonlinear crystal with a periodically domain inversion structure (e.g. periodically poled MgO doped lithium niobate) which is bonded with a laser crystal (e.g. Nd doped YVO 4 ) and to achieve efficient second harmonic generation in an intra-cavity configuration.
Abstract:
A laser apparatus for producing a laser light beam can include a gain medium; a pump light source to provide a pump light beam to the gain medium; a first reflector disposed between the first gain medium and the first pump light source and spaced apart from a gain portion of the first gain medium; a second reflector; and an output coupler. The first reflector is substantially reflective to the laser light beam and substantially transmissive to the pump light beam. The first and second reflectors and the output coupler define a folded beam path having a first portion and a second portion. The first portion of the beam path extends from the first reflector to the second reflector through the gain medium and the second portion of the beam path extends from the first reflector to the output coupler through the gain medium. The first and second beam paths define, within the gain medium, a non-zero folding angle. Optionally, the laser apparatus can include a second pump light source that can pump the same, or a second, gain medium.
Abstract:
Laser radiation delivered to a treatment area causes vapopzation of a substantially greater volume of tissue than the volume of residual coagulated tissue The laser radiation may have a wavelength of about 300 m to about 700 nm, may be used with a smoke suppressing irpgant, may have an average irradiance greater than about 5 k?lowatts/cm2, and may have a spot size of at least 0 05 mm2 A laparoscopic laser device, for use with an insufflated bodily cavity, may include an elongate body adapted for insertion into an insufflated bodily cavity A laser energy delivery element, at the distal end of the elongate body, may be coupleable to a source of tissue-vapopzation-capable laser energy and capable of delivepng laser energy along a laser energy path extending away from the laser energy delivery element A smoke-suppressing liquid pathway extending along the elongate body may be coupleable to a source of a smoke-suppressing liquid
Abstract translation:传递到治疗区域的激光辐射导致显着更大量的组织的蒸发,而不是残留的凝固组织的体积。激光辐射可以具有约300μm至约700nm的波长,可以与烟雾抑制剂一起使用,可以具有 平均辐照度大于约5kΩ/ cm 2,并且可以具有至少0.05mm 2的光斑尺寸。用于与吹入的体腔一起使用的腹腔镜激光装置可以包括适于插入到吹入的身体内的细长体 空腔在细长本体的远端处的激光能量输送元件可以可耦合到具有组织膨胀能力的激光能量的源并且能够沿远离激光能量输送元件A延伸的激光能量路径输送激光能量 沿着细长主体延伸的抑烟液体路径可以连接到抑烟液体源
Abstract:
Laser radiation delivered to a treatment area causes vaporization of a substantially greater volume of tissue than the volume of residual coagulated tissue. The laser radiation may have a wavelength of about 300 nm to about 700 nm, may be used with a smoke suppressing inigant, may have an average irradiance greater than about 5 kilowatts/cm 2 , and may have a spot size of at least 0.05 mm 2 . A laparoscopic laser device, for use with an insufflated bodily cavity, may include an elongate body adapted for insertion into an insufflated bodily cavity. A laser energy delivery element, at the distal end of the elongate body, may be coupleable to a source of tissue-vaporization-capable laser energy and capable of delivering laser energy along a laser energy path extending away from the laser energy delivery element. A smoke-suppressing liquid pathway, extending along the elongate body to an exit opening at the distal end, may be coupleable to a source of a smoke-suppressing liquid. The smoke- suppressing liquid is directed generally along the laser energy path. A remote visualization device may be used to view along the laser energy path.
Abstract:
The invention concerns a device with an elongated optical guide (1) and pumping means, for producing by stimulated emission an optical signal (4) under the effect of an optical pumping by a pump wave (6), the stimulated emission from the active elements of the guide having been excited by the pump wave. The invention is characterized in that the single-crystal guide having a core (3) doped with active elements and a non-doped peripheral cladding (2) enables the pump wave to be guided and confined in its entire volume, the optical signal (4) produced in the core being freely propagated (8),the optical indices of the core and the cladding being sufficiently close to avoid guiding in the doped core. In an implementation mode, the guide has a shorter length than the length of an optical signal Raleygh length in the guide. The device can be implemented in impulse optical amplifiers or laser oscillators.
Abstract:
A chip-shaped laser medium (12) is side pumped to improve mode matching between the pumping energy (50) and lasing mode volume (36). The chip thickness (44) and laser medium doping level can be designed and controlled to ensure adequate pumping coupling efficiency. The chip shape can also be employed to provide greater chip surface areas (22) for cooling the laser medium (12). The laser pumping package (70), gain module (10 1 ), and chip-shaped design can be scalable to offer higher pumping power and high output power. Different orientations of the gain modules (10 1 ) with respect to each other can be used to provide better lasing mode quality.
Abstract:
L'invention concerne un dispositif laser comprenant : un milieu amplificateur (1, 7) apte à générer un faisceau laser (13) de longueur d'onde fondamentale ; un milieu (3, 20, 20) non linéaire biréfringent pour le doublage de fréquence du faisceau laser de longueur d'onde fondamentale de façon à générer un faisceau laser (14) de longueur d'onde harmonique ; un milieu polarisant (1b, 5, 6, 2, 8, 9, 16, 20) pour sélectionner une polarisation du faisceau laser de longueur d'onde fondamentale, ce milieu polarisant étant tel que l'onde fondamentale à sa sortie reste parallèle à l'onde fondamentale à son entrée ; Selon l'invention, le milieu polarisant (1b, 5, 6, 2, 8, 9, 16, 20) comprend une face de sortie (2b) perpendiculaire à l'onde fondamentale sortant de ce milieu polarisant. Le milieu amplificateur, le milieu non linéaire biréfringent et le milieu polarisant sont solidaires entre eux de façon à constituer une cavité résonante monolithique.