A high-power ytterbium-doped calcium fluoride laser system is disclosed herein which includes at least one pump source, at least one laser cavity formed by at least one high reflector and at least one output coupler, and at least one ytterbium-doped calcium fluoride optical crystal positioned within the laser cavity in communication with the pump source, the ytterbium-doped calcium fluoride optical crystal configured to output at least one output signal of at least 20 W, having a pulse width of 200 fs or less, and a repetition rate of at least 40 MHz.

A laser including a solid state laser gain medium having a D-shaped cross section and an unstable resonator laser cavity including the solid state laser gain medium configured with a geometric magnification in a range of 1 to 5 under the intended operating conditions, including the effects of thermal lensing in the gain medium. An optical switching device in the unstable resonator laser cavity generates a pulse duration in the range of 0.05 to 100 nanoseconds. A diode-pump source is configured to inject pump light through the curved or barrel surface of the D-shaped gain medium.

A laser oscillation device includes: a refrigerant container; at least one cartridge which is attached to the refrigerant container and which includes a laser gain medium and an incidence path section for guiding laser seed light to the laser gain medium; at least one nozzle for spraying a refrigerant to the laser gain medium, the at least one nozzle being disposed inside the refrigerant container, and a vacuum heat insulating container housing the refrigerant container inside and forming a vacuum insulation layer on an outer peripheral side of the refrigerant container. The cartridge is disposed so as to be insertable and removable with respect to the refrigerant container along a longitudinal direction of the laser gain medium.

A device for amplifying a multi-wavelength pulsed laser beam is provided, which comprises: a solid amplifying medium with two planer faces, a front face and a reflecting rear face; and a device for cooling the amplifying medium by the rear face. The front face of the amplifying medium is tilted relative to its rear face by a first non-zero tilt and the device further comprises a trapezoidal prism, with an input face and an output face which form between them a second non-zero tilt, the first and second tilts being such that the beams of each wavelength are parallel to one another at the output of the prism.

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.

A laser system is provided that includes a master oscillator, a pre-amplifier, a power amplifier, a beam doubler, and a beam tripler. The laser system is configured to generate three different wavelengths, including, for example, wavelengths of 1064 nm, 532 nm, and 355 nm. The pre-amplifier can be optically aligned along a beam path exiting the master oscillator, to receive and pre-amplify a laser beam generated by the master oscillator. The amplifier can be optically aligned along a beam path exiting the pre-amplifier, and can be configured to receive a pre-amplified laser beam generated by the pre-amplifier. The beam doubler and beam tripler can be optically aligned along a beam path exiting the amplifier and can be configured to double and triple, respectively, an amplified laser beam generated by the amplifier.