A laser transmitter assembly for use in a Coherent Doppler Wind Lidar (CDWL) system includes a telescope/scanner assembly, a receiver, and a master oscillator crystal and a power amplifier crystal each constructed of Ho:YAG. The crystals are end-pumped to transmit an output beam through the telescope/scanner assembly with a high repetition rate of 200-300 Hz and 35 mJ of energy. As part of the CDWL system, a pump laser end-pumps the master oscillator and power amplifier crystals using a pump beam having a nominal wavelength of 1.905 m. A seed laser transmits a seeding beam into the master oscillator crystal at a nominal wavelength of 2.0965 m. The telescope/scanner assembly transmits the generated laser beam through an atmosphere toward a scene of interest, collects a backscattered return signal, and communicates the backscattered return signal to the receiver during operation of the CDWL system.

A narrow-band diode pumped alkali laser (DPAL) comprising a diode emitter assembly of broad area diode lasers arranged in a stack or array to emit longitudinally at a power level in a power range of 10-1500 W through a frequency selective element assembly aligned and positioned in an external laser cavity to the diode emitter assembly. The frequency selective element assembly comprising: an optical cell containing alkali vapor positioned between a pair of crossed polarizers; a partially reflective mirror that reflects a portion of light passing through the optical cell back toward the diode emitter assembly; and magnetic field producing components that produce a magnetic field through the optical cell that creates a 90 polarization of light passing through the optical cell at a narrow-band frequency corresponding to the absorption line of alkali atom, attenuating components of the light passing through the optical cell at frequencies outside of the narrow-band frequency.

An amplifier assembly may include a first heat sink plate that includes a first channel, a second heat sink plate that includes a second channel, and an amplifier rod disposed in the first channel and the second channel. The second heat sink plate may be connected with the first heat sink plate such that the first channel and the second channel align. The amplifier rod may be connected to the first heat sink plate and the second heat sink plate by a non-eutectic solder.

A microchip laser and a handpiece including the microchip laser. The microchip laser includes a laser medium with input and output facets. The input facet is coated with a highly reflective dielectric coating at microchip laser wavelength and highly transmissive at pump wavelength. The output facet is coated with a partially reflective at microchip laser wavelength dielectric coating. A saturable absorber attached by intermolecular forces to output facet of microchip laser. A handpiece for skin treatment includes the microchip laser.

A method for producing a radiation field amplifying system for amplifying a to be amplified radiation field, in particular for producing a thin disc laser amplifying system, which comprises an amplifying element with a laser active body and a cooling system for cooling said amplifying element with at least one heat sink element wherein the method comprises the step of connecting said amplifying element and said at least one heat sink element is proposed by soldering with a solder filling composition, wherein the step of soldering comprises heating up, in particular melting, said solder filling composition by exposing said solder filling composition to a soldering radiation field.

A solid-state laser device includes a laser rod made of an alexandrite crystal; a flash lamp that outputs excitation light for exciting the laser rod, a glass tube for a lamp being made of quartz glass that at least blocks deep ultraviolet light having a wavelength of 200 nm to 300 nm, and transmits visible light having a wavelength of 400 nm or more; and a laser chamber that contains a tubular reflector that includes a hole part containing at least a portion of the laser rod or a portion of the flash lamp and is made of a porous material of polytetrafluoroethylene, an inner wall surface of the hole part being as a reflecting surface that reflects the excitation light.

Systems and methods for end pumped laser mirror stack assemblies are provided. In one embodiment, an end pump mirror stack assembly for a laser resonator comprises: a pump light injection layer applied to a transparent substrate, the pump light injection layer comprising at least one light generating optical emitter embedded within the pump light injection layer, wherein the pump light injection layer is configured to transmit a pump light having a first wavelength into the substrate; a multilayer thin-film mirror stack coupled to the transparent substrate; a lasing material layer coupled transparent substrate and positioned to receive the pump light, wherein the lasing material layer is doped with a dopant that generates a fluorescent light output at a second frequency when exposed to the pump light; and an antireflective coating applied to the substrate, the first anti-reflective coating configured to pass light of the first wavelength.

A multilayer mirror, ring laser gyroscope and method are disclosed. For example, the multilayer mirror includes a plurality of alternating layers of a high index of refraction optical material and a low index of refraction optical material, an amplification layer of an optical material disposed on the plurality of alternating layers, and a coating of an anti-reflective material disposed on an outermost surface of the optical material amplification layer.

Provided is a solid-state laser device in which a linear resonator including an output mirror and a rear mirror, a laser rod, and optical members are provided on a common base and are contained in a housing having the base as a portion. A holding part is provided to hold an excitation light source that extends parallel to the laser rod on a side of the laser rod opposite to the base. The optical members including a Q-switch are disposed between the laser rod and the rear mirror. An upper end position of the output mirror is at a position lower than a lower end position of the excitation light source held by the holding part, with the base as a reference. The holding part holds the excitation light source so as to be capable of being inserted and extracted with respect to the output mirror side in a longitudinal direction of the excitation light source.

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.