Provided is a laser oscillation element including a cholesteric liquid crystal layer, in which even in a case where the intensity of excitation light is weak, laser oscillation can be induced. The laser oscillation element includes a cholesteric liquid crystal layer obtained by cholesteric alignment of a liquid crystal compound, in which in a cross-section of the cholesteric liquid crystal layer observed with a scanning electron microscope, bright portions and dark portions derived from the cholesteric liquid crystalline phase are tilted with respect to a main surface of the cholesteric liquid crystal layer, the cholesteric liquid crystal layer includes a colorant that emits light by excitation, and a luminescence wavelength range of the colorant and a selective reflection wavelength range of the cholesteric liquid crystal layer at least partially overlap each other.

A tube preparation step of preparing a resin tube that has a tube wall impregnable with a solution including a fine substance and is made of a light-transmitting resin material, a solution preparation step of preparing a solution that includes a fine fluorescent substance that emits fluorescence or a fine scattering substance that scatters light as an oscillation material and an impregnation step of causing the resin tube to be immersed in the solution and causing the tube wall of the resin tube to be impregnated with the oscillation material, are included.

A laser energy meter circuit, method, and system for measuring excitation and ionization of a reactant. The laser energy meter circuit includes a pyroelectric detector head configured to receive laser pulses and output current signals; an amplifier having a first amplifier input and an amplifier output configured to generate amplified voltage signals; a sample-and-hold circuit; a trigger circuit connected to a second sample-and-hold input, wherein the trigger circuit is configured to receive a TTL signal and generate a delayed output pulse, Q.sub.1 and a trigger signal, Q.sub.2; a sample-and-hold circuit output configured to output the maximum pulse voltage when the trigger signal is received at the second sample-and-hold input; a switched capacitor bank connected to the sample-and-hold circuit output; and a peak detector circuit configured to measure a magnitude of the maximum pulse voltage and generate an averaged DC maximum pulse voltage signal.

A laser energy meter circuit, method, and system for measuring excitation and ionization of a reactant. The laser energy meter circuit includes a pyroelectric detector head configured to receive laser pulses and output current signals; an amplifier having a first amplifier input and an amplifier output configured to generate amplified voltage signals; a sample-and-hold circuit; a trigger circuit connected to a second sample-and-hold input, wherein the trigger circuit is configured to receive a TTL signal and generate a delayed output pulse, Q.sub.1 and a trigger signal, Q.sub.2; a sample-and-hold circuit output configured to output the maximum pulse voltage when the trigger signal is received at the second sample-and-hold input; a switched capacitor bank connected to the sample-and-hold circuit output; and a peak detector circuit configured to measure a magnitude of the maximum pulse voltage and generate an averaged DC maximum pulse voltage signal.

Optical gain media and gain devices are required for lasing devices and high intensity optical systems across a wide range of application. A compact optical gain device that provides near-infrared and infrared lasing at room temperature includes an optical microcavity having a refractive index and a curvilinear outer surface with an angle of curvature such that the optical microcavity supports the propagation of an electromagnetic whispering gallery mode. A plurality of optical gain structures are disposed along the curvilinear outer surface of the optical microcavity, the each of the optical gain structures having an optically active wavelength range over which each of the corresponding optical gain structures provides optical gain to radiation through stimulated emission.

Provided is a high-power laser beam transmission device using an index matching fluid. The high-power laser beam transmission device may include an optical fiber transmitting a laser beam, and an index matching fluid disposed at both ends of the optical fiber emitting a laser beam received from the optical fiber. According to the present disclosure, an index matching fluid having a refractive index similar to that of an optical fiber is disposed at both ends of the optical fiber, thereby minimizing a reflection loss.

A laser device according to the present invention may comprise: a pumping laser supply unit for emitting a pumping laser having a nano-second pulse width; and a laser output unit disposed at one side of the pumping laser supply unit and generating an output laser which is pumped by the pumping laser to have a nano-second pulse width corresponding to the pulse width of the pumping laser.

A fluid filled fiber for a quasi-phase matched generator and a laser incorporating such a fluid filled fiber. The laser has a liquid filled fiber with charge transfer molecules dissolved in a solvent. The liquid of the liquid filled fiber comprises or consists essentially of highly polar liquids and/or charge transfer molecules having relatively high molecular dipole values.

A fluid filled fiber for a quasi-phase matched generator and a laser incorporating such a fluid filled fiber. The laser has a liquid filled fiber with charge transfer molecules dissolved in a solvent. The liquid of the liquid filled fiber comprises or consists essentially of highly polar liquids and/or charge transfer molecules having relatively high molecular dipole values.

The olive oil-tuned broadband conjugated polymer laser medium includes the conjugated polymer known as poly ((9,9-dihexyl-9H-fluorene-2,7-vinylene)-co-(1-methoxy-4-(2-ethylhexyloxy)-2,5-phenylenevinylene)) or Poly(FV-co-MEHPV) at a 90:10 mole ratio. The emission wavelength of the olive oil tuned broadband conjugated polymer laser can be reversibly tuned between 500 nm and 680 nm.