Automated free-space beam delivery system for ultrafast laser beams in the kW regime

Analytic model of bunched beams for harmonic generation in the low-gain free electron laser regime

1098-4402= One scheme for harmonic generation employs free electron lasers (FELs) with two undulators: the first uses a seed laser to modulate the energy of the electron beam; following a dispersive element which acts to bunch the beam, the second undulator radiates at a higher harmonic. These processes are currently evaluated using extensive calculations or simulation codes which can be slow t...

Beam Combination and Control - Andrusyak 2 Fiber laser system with kW - level spectrally - combined output

Beam combining techniques have become an important tool in design of high-power highbrightness laser systems [1]. Maximum power that can be obtained from single high-power amplifiers is usually limited by thermal distortion of active medium and beam quality degradation in solid-state lasers or non-linear effects and active fiber damage in fiber lasers. Beam combining offers an alternative solut...

FREE-SPACE IMAGING TECHNOLOY FOR THz BEAMS

Novel laser system for ultrafast spectroscopy

The design and performance of a cavity-dumped Ti:sapphire (CD-TS) oscillator and short pulse-pumped amplifier system is presented. Dumped pulses as short as 12 fs duration and 60 nJ in energy, with 70%-80% dumping efficiency are made possible by a stretched dumper-arm configuration. The oscillator yields stable, reliable, and reproducible pulses. Pulse duration and phase structure are analyzed ...

Intensity Position Modulation for Free-Space Laser Communication System

In this study a novel analog modulation-demodulation technique for free-space laser communication system called Intensity Position Modulation (IPM) is carried out. According to TEM00 mode of a laser beam and by linear fitting on the Gaussian function as an approximation, the variation of the linear part on the reverse biased pn photodiode produced various currents. Our simulated results show fi...