摘要:
Um Abdichtprobleme am Resonatorraum (2) eines Gaslasers (1) auszuschließen, wenn ein Maschinenteil (13) innerhalb des Resonatorraumes (2) bzw. des Resonatorgehäuses (6) von außen verstellt werden muß, wird erfindungsgemäß an der Außenseite (22) der Wand (11) des Resonatorgehäuses (6) ein als Magnet ausgebildeter Mitnehmer angeordnet. Dabei bestehen die Wand (11) im Verstellbereich (19) des Maschinenteils (13) bzw. des Mitnehmers (23) aus einem nicht oder schwach magnetisierbaren Material und das Maschinenteil (13) mindestens teilweise aus magnetisierbarem Werkstoff. Dadurch werden Durchbrüche in der Wand des Resonatorgehäuses (6) und damit des Resonatorraumes (2) unnötig, so daß sich keinerlei Dichtungsprobleme ergeben.
摘要:
Within a resonator (7), a polarizer (3) for linearly polarizing an oscillation laser beam is provided and a birefringence filter (5) for forming the oscillation laser beam into narrow band is arranged. Accordingly, in forming an excimer laser into narrow band, no possible damage of an optical system is present, an oscillation output is not lowered, and a laser of high efficiency can be provided.
摘要:
Un procédé et un appareil de lithotritie laser permettent de soumettre des matières calcifiées dans le corps d'un mammifère, notamment le corps humain, à deux faisceaux de lumière laser pulsée qui se chevauchent dans le temps et dans l'espace dans les plages de longueurs d'ondes comprises entre 300-450 et 600-900 nanomètres. Dans un premier mode de réalisation, les deux faisceaux de lumière laser sont formés par un laser déclenché (19) associé à un cristal de doublement des fréquences (6). Dans un deuxième mode de réalisation, chaque faisceau de lumière laser est formé par un laser déclenché indépendant (15 et 16), puis les faisceaux sont combinés par le miroir (12). Dans les deux modes de réalisation, on utilise un miroir frontal (7) afin de diriger les faisceaux laser vers un système d'administration endoscopique (8).
摘要:
A laser resonator (20) generates a polarized output beam (50) with a laser medium (21) exhibiting thermally induced birefringence and a Y-shaped resonant cavity. A lasing axis extends between a first side (22) and a second side (23) of the laser medium. Radiation transmitted out of the first side of the laser medium has its polarization rotated (25) by 90 degrees and is guided back along the lasing axis into the laser medium for a second pass. A polarizer (26) is mounted on the second side of the laser medium for guiding the radiation having a first polarization along a first path (27) and radiation having a second polarization that is 90 degrees from the first polarization along a second path (39). Both paths include the lasing axis of the laser medium and form a Y-shaped resonant cavity. Along the first path, a high reflecting means (M1) is provided to reflect the radiation back along the first path. Along the second path, an output coupler (37) is provided by which a component of the radiation is reflected back along the second path and a component is transmitted as the polarized output beam (50). A Q-switch (26,28,30) is provided in the first path between the polarizer and the high reflecting means, or (33,34) in the second path between the polarizer and the output coupler, or in both paths.
摘要:
A laser device includes an optical resonator comprising a laser medium (1) and two totally reflecting mirrors (2,3) disposed on respective sides of the laser medium. The laser device also has a wavelength selection element (5) disposed between one of the totally reflecting mirrors and the laser medium. A partially reflecting mirror (4) is disposed between the wavelength selection element and the laser medium. Any distorsion and deterioration of the wavelength selection device are greatly reduced.
摘要:
A broadly wavelength-tunable laser is provided which comprises as the laser medium a single crystal of emerald. The laser may be operated over a broad temperature range from cryogenic temperatures to elevated temperatures. Emission is in a spectral range from red to infrared, and the laser is useful in the fields of defense, communications, isotope separation, photochemistry, etc.
摘要:
Embodiments are directed to methods for correcting lateral and angular displacement of laser beams within a laser cavity. For some embodiments, such methods are used to correct angular displacement of laser beams within a laser cavity that result from varying the lasing wavelength in a tunable laser system.
摘要:
Embodiments are directed to methods for correcting lateral and angular displacement of laser beams within a laser cavity. For some embodiments, such methods are used to correct angular displacement of laser beams within a laser cavity that result from varying the lasing wavelength in a tunable laser system.