60 results about "2 μm laser" patented technology

CdSiP2 crystals with sizes and optical quality suitable for use as nonlinear optical devices are disclosed, as well as NLO devices based thereupon. A method of growing the crystals by directional solidification from a stoichiometric melt is also disclosed. The disclosed NLO crystals have a higher nonlinear coefficient than prior art crystals that can be pumped by solid state lasers, and are particularly useful for frequency shifting 1.06 μm, 1.55 μm, and 2 μm lasers to wavelengths between 2 μm and 10 μm. Due to the high thermal conductivity and low losses of the claimed CdSiP2 crystals, average output power can exceed 10 W without severe thermal lensing. A 6.45 μm laser source for use as a medical laser scalpel is also disclosed, in which a CdSiP2 crystal is configured for non-critical phase matching, pumped by a 1064 nm Nd:YAG laser, and temperature-tuned to produce output at 6.45 μm.

A 2-micrometer laser device capable of forming a half-intracavity optical parametric oscillator on the basis of a volume grating sequentially comprises a first plane mirror, a laser crystal, an acousto-optic Q-switch, a second plane mirror, a nonlinear crystal, a third plane mirror and the volume grating; the first plane mirror, the laser crystal, the acousto-optic Q-switch and the third plane mirror form a 1-micrometer laser device; the second plane mirror, the nonlinear crystal and the volume grating form an optical parametric oscillator; a large beam radius side is arranged on a main nodal plane of the laser crystal; the first plane mirror is high in reflectivity to 1-micrometer laser; the second plane mirror is high in reflectivity to 2-micrometer laser and high in transmission to the 1-micrometer laser; the third plane mirror is high in reflectivity to the 1-micrometer laser and high in transmittance to the 2-micrometer laser; the nonlinear crystal is arranged at the position corresponding to the maximum confocal parameter of 1-micrometer laser beams; and the 2-micrometer laser can be partially transmitted through the volume grating and can be partially reflected by the volume grating. The 2-micrometer laser device has the advantages that the 2-micrometer laser with high beam quality and power and narrow line width can be outputted by the 2-micrometer laser device, and the 2-micrometer laser device is simple in structure and low in cost.

The invention discloses a two-micron wave band impulse fiber laser based on a super-continuum spectrum light source, aiming to provide a two-micron wave band impulse fiber laser which easily realizes ps-ns order impulse width laser and is based on the super-continuum spectrum light source. The laser disclosed by the invention consists of the super-continuum spectrum light source, a wavelength division multiplexer, a high-reflectivity fiber bragg grating, a low-reflectivity fiber bragg grating, a gain fiber and a fiber isolator. The super-continuum spectrum light source is selected as a pumping source; super-continuum spectrum light entering the gain fiber contains both pumping light and signal light which are required by the laser and through the wavelength division multiplexer; and as an initial seed laser, the signal light contained by the super-continuum spectrum is reflected and amplified in a resonant cavity, and laser output is obtained finally. According to the invention, the width of the impulse of the two-micron laser depends on pumping super-continuum spectrum light source and is not limited by the cavity length of the laser, the two-micron impulse laser with high repetition frequency can be obtained, and the structure of a system is simple and easy to realize.

CdSiP2 crystals with sizes and optical quality suitable for use as nonlinear optical devices are disclosed, as well as NLO devices based thereupon. A method of growing the crystals by directional solidification from a stoichiometric melt is also disclosed. The disclosed NLO crystals have a higher nonlinear coefficient than prior art crystals that can be pumped by solid state lasers, and are particularly useful for frequency shifting 1.06 μm, 1.55 μm, and 2 μm lasers to wavelengths between 2 μm and 10 μm. Due to the high thermal conductivity and low losses of the claimed CdSiP2 crystals, average output power can exceed 10 W without severe thermal lensing. A 6.45 μm laser source for use as a medical laser scalpel is also disclosed, in which a CdSiP2 crystal is configured for non-critical phase matching, pumped by a 1064 nm Nd:YAG laser, and temperature-tuned to produce output at 6.45 μm.