The present disclosure relates to a laser system. The laser system may have at least non-flat gain media disc. At least one pump source may be configured to generate a beam that pumps the non-flat gain media disc. A laser cavity may be formed by the pump source and the non-flat gain media disc. An output coupler may be included for receiving and directing the output beam toward an external component.

A method of additive manufacture utilizing a uniform laser beam is disclosed. A seed laser projects a laser beam having a first laser beam shape. At least one pre-amplifier is positioned to receive the laser beam and amplify laser beam power. A homogenizer is positioned to receive the amplified laser beam from the at least one pre-amplifier and alter the first laser beam shape into a second laser beam shape. A main amplifier is positioned to receive the amplified laser beam having the second laser beam shape from the homogenizer and amplify laser beam power.

Methods, systems and apparatus are disclosed for delivery of pulsed treatment radiation by employing a pump radiation source generating picosecond pulses at a first wavelength, and a frequency-shifting resonator having a losing medium and resonant cavity configured to receive the picosecond pulses from the pump source at the first wavelength and to emit radiation at a second wavelength in response thereto, wherein the resonant cavity of the frequency-shifting resonator has a round trip time shorter than the duration of the picosecond pulses generated by the pump radiation source. Methods, systems and apparatus are also disclosed for providing beam uniformity and a sub-harmonic resonator.

The present invention relates to a novel stand-off distance chemical detector system such as can be used, for example, for standoff detection of explosives. Instead of a conventional lasing medium, a Pr:YAG or Pr:BYF based UV laser is used which can be advantageously implemented in Raman spectroscopy.

A SBS laser system comprises at least one pump laser that emits a pump beam, and an intensity modulator in communication with the pump laser. The intensity modulator modulates an intensity of the pump beam and transmits an intensity modulated beam. A resonator, in communication with the intensity modulator, is configured to receive the intensity modulated beam such that it travels in a first direction. When optical frequency of the intensity modulated beam matches resonance frequency of the resonator, a power density increases such that beyond a certain threshold power, the intensity modulated beam produces lasing of a first order Brillouin wave including a SBS wave having a SBS gain peak. The SBS wave travels in an opposite second direction in the resonator. A control unit eliminates or reduces the intensity modulation of the beam by minimizing the frequency gap between the SBS gain peak and an SBS resonance peak.

A ring laser gyroscope is provided. A light source is configured to generate light of a first wavelength. A plurality primary cavity mirrors are configured to route light of a second wavelength around a primary cavity to a readout device. One primary cavity mirror of the plurality of primary cavity mirrors includes a gain medium. The pumping mirror and the one primary cavity mirror including the gain medium is positioned and configured to reflect the light of the first wavelength back and forth in a pumping cavity through the gain medium, wherein the light of the first wavelength stimulates the gain medium to generate the light of the second wavelength that are reflected around the primary cavity to the readout device.

A ring laser gyroscope is provided. A light source is configured to generate light of a first wavelength. A plurality primary cavity mirrors are configured to route light of a second wavelength around a primary cavity to a readout device. One primary cavity mirror of the plurality of primary cavity mirrors includes a gain medium. The pumping mirror and the one primary cavity mirror including the gain medium is positioned and configured to reflect the light of the first wavelength back and forth in a pumping cavity through the gain medium, wherein the light of the first wavelength stimulates the gain medium to generate the light of the second wavelength that are reflected around the primary cavity to the readout device.

A micro femtosecond laser with reduced radiation and temperature sensitivity is provided. The laser includes a housing with a radiation shield. Optical components that include a micro gain element are received within the housing. An input end of a pump light delivering fiber is positioned outside the housing. An output end of the pump light delivering fiber is positioned within the housing to deliver input beams to the optical components. A light signal generating pump is used to generate the input beams that are communicated to the input end of the pump light delivering fiber. A first end of a hollow core fiber is positioned within the housing to be in optical communication with the optical components. A second end of the hollow core fiber is positioned outside the housing. A partially reflective output coupling mirror is in optical communication with the second end of the hollow core fiber.

Coupled resonators having two resonances are described. A first resonance occurs at the frequency of a pump signal. A second resonance occurs at the frequency of a first Stokes signal. The stop band of the coupled resonators suppresses the second Stokes signal and thus all other higher order Stokes signals. The coupled resonators can be used to more efficiently generate a first Stokes signal having a narrow line width signal.

Methods, systems and apparatus are disclosed for delivery of pulsed treatment radiation by employing a pump radiation source generating picosecond pulses at a first wavelength, and a frequency-shifting resonator having a lasing medium and resonant cavity configured to receive the picosecond pulses from the pump source at the first wavelength and to emit radiation at a second wavelength in response thereto, wherein the resonant cavity of the frequency-shifting resonator has a round trip time shorter than the duration of the picosecond pulses generated by the pump radiation source. Methods, systems and apparatus are also disclosed for providing beam uniformity and a sub-harmonic resonator.