A diode-side-pumped, high-energy, high-beam-quality, pulsed solid-state Nd3+:Y3Al5O12 (Nd:YAG) laser with a thermoelectric cooler (TEC) is investigated in this study. The pump laser was a pulsed laser diode array with maximum peak power of 15 kW. A 350 mJ laser pulse was obtained with a wavelength of 1064 nm, a pulse duration of 10 ns, a total electrical-to-optical efficiency of 7.5%, a relativ...

Wavelength beam combining was used to co-propagate beams from 28 elements in an array of distributed-feedback quantum cascade lasers (DFB-QCLs). The beam-quality product of the array, defined as the product of near-field spot size and far-field divergence for the entire array, was improved by a factor of 21 by using wavelength beam combining. To demonstrate the applicability of wavelength beam ...

Theoretical performance and preliminary experimental verification of a twotelescope optical array receiver, currently under development at the Jet Propulsion Laboratory as part of a research and technology development effort, is described in this article. A brief summary of optical communications theory for array reception of pulsed laser signals is developed, and the application of coding to o...

A micromachined sensor array for making optical measurements of surface pressure distributions has been designed, fabricated and tested. Each sensor element in the array consists of a Fabry-Perot etalon fabricated from single-crystal silicon. Illuminating the sensor array with a near-infrared, tunable diode laser and detecting the reflected light intensity with an infrared camera allows remote,...

We report a target design which produced substantial gain in relativistic electron-positron pair production using high-intensity lasers and targets with large-scale micro-structures on their surface. Comparing to an unstructured target, selected Si microwire array yielded near 100% increase the laser-to-positron conversion efficiency 10 MeV average emitted positron energy under nominally same e...

A phase sensing system fitted to the control of coherent laser beam array large cross section is experimented. It based on use a fiber bundle that collects weak part synthetic wavefront, scales it down (1/40) and reshapes in more compact arrangement (2D 1D array). Then, reconfigured can be analyzed by small footprint making easier phase-lock. The discrete wavefront transmitted meter long was st...

The application of directed energy to spacecraft mission design is explored using rapid transit Mars as the objective. An Earth-based laser array unprecedented size (10 m diameter) and power (100 MW) assumed be enabled by ongoing developments in photonic technology. A phased-array this incorporating atmospheric compensation would able deliver cislunar space, where incident focused into a hydrog...