Abstract:
A MOPA laser system that includes a seed laser configured to output pulsed laser light, an amplifier configured to receive and amplify the pulsed laser light emitted by the seed laser; and a pump laser configured to deliver a pump laser beam to both the seed laser and the amplifier.
Abstract:
A slab laser and its method of use for high power applications including the manufacture of semiconductors and deposition of diamond and/or diamond-like-carbon layers, among other materials. A lamp driven slab design with a face-to-face beam propagation scheme and an end reflection that redirects the amplified radiation back out the same input surface is utilized. A side-to-side amplifier configuration permitting very high average and peak powers having scalability is also disclosed. Cavity filters adjacent to pump lamps convert the normally unusable UV portion of the pump lamp spectrum into light in the absorption band of the slab laser, thereby increasing the overall pump efficiency. The angle of the end reflecting surface is changed to cause the exit beam to be at a different angle than the inlet beam, thereby eliminating the costly need to separate the beams external to the laser with the subsequent loss of power.
Abstract:
According to the present invention there is provided a laser with compact planar ring cavity that produces unidirectional laser oscillation without using intracavity elements, and which can operate in single-frequency regime. A special prism is used as output coupler and the properties of internal reflection in this prism are used to select one of the two possible oscillation directions of the ring cavity. The compact design, without intracavity elements to enforce unidirectional oscillation, allows higher output powers to be achieved. Stable single- frequency operation is achieved by the combined use of frequency selective elements, such as volume Bragg gratings, etalons, or birefringent filters, with a compact design of the cavity, which can include a monolithic structure, and the use of structural materials with low thermal expansion coefficient.
Abstract:
A long pulse alexandrite laser for treating dermatological specimens is disclosed. The use of alexandrite allows operation in the near-infrared, specifically in a 50 nm range surrounding 755. Infrared in this range allows good penetration while still achieving an acceptable ratio of hemoglobin to melanin absorption. In operation, the laser generates pulses having a durations between 5 and 100 msec and fluences between 10 and 50 J/cm . A light delivery system is provided that transmits the laser light output pulse to dermatological targets of a patient. The invention is also directed to a hair removal system. Here, it is desirable to use an index-matching application on the skin sections to be treated, and a visual indicator is thermo- or photo-responsive or otherwise responsive to the laser light pulse to generate a visible change. This provides the operator with a record of those parts of the skin that have already been treated. Finally, the invention is directed to a combined sclerotherapy and light treatment method and kit for unwanted veins. Substantially increased success, in the range of 90-100 % has been achieved by implementing a dwell time of between 12 hours and 6 months between the light-based therapy and the sclerotherapy. Preferably, the light-based therapy is performed before the sclerotherapy. Success can be achieved by performing the sclerotherapy followed by the light-based therapy after the dwell time, however.
Abstract:
Solid state laser gain media of segmented construction are composed of at least two segments of a doped crystalline laser host which are arranged in crystallographic alignment, wherein the dopant concentration varies from segment to segment to provide gradient doping levels for reducing thermally generated stress/strain in the lasing operation.
Abstract:
In some embodiments, the present invention provides for a laser pump chamber, including: at least one laser gain medium, at least one excitation source, and at least one diffuse reflector to direct and redirect an emission from the excitation source into the laser gain medium, wherein the at least one diffuse reflector is made from a diffuse reflector material comprising at least one of: 1) white quartz and 2) BaS04.