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—Beam combining of laser arrays with high efficiency and good beam quality for power and radiance (brightness) scaling is a long-standing problem in laser technology. Recently, significant progress has been made using wavelength (spectral) techniques and coherent (phased array) techniques, which has led to the demonstration of beam combining of a large… (More)
We report on the development of a 50-mJ-class ∼10-ps chirped-pulse amplifier at kHz repetition rates using cryogenic Yb∶YAG regenerative and multi-pass amplifiers. The system is well suited as pump laser for kHz high-average-power ultra-broadband OPCPAs.
III The use of diode lasers instead ofHashlamps as optical pump sources for solid state lasers offers significant advantages such as higher efficiency and longer lifetime. We have demonstrated three novel lasers based on this technology. The first is a zigzag slab laser pumped by hybrid planar microchannel-cooled diode arrays that allow high-repetition-rate… (More)
Nonlinear optics plays a key role in many applications not only as a means of frequency synthesis and control, but also as a source of twin photons and other nonclas-sical states of light. Advances in nonlinear materials, including engineered nonlinear interactions through the use of quasi-phase matching, have increased the flexibility and performance of… (More)
Efficient combination of an array of lasers requires alignment of their polarization states. We demonstrate a simple architecture for polarization control by coherently combining eight passive non-PM fibers resulting in a PER of 19 dB.
We have demonstrated active coherent beam combination of 218 individually-addressable semiconductor amplifiers with 38.5W CW output. Phase actuation was achieved by adjusting the drive current and controlled using a stochastic-parallel-gradient-descent algorithm.
Beam combining of a laser array allows power scaling with increased brightness. Here we report 27 W of coherently combined power from 9 solid-state intracavity gain elements with a combining efficiency of 87%.