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Laser

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Full-Text Articles in Physical Sciences and Mathematics

Hybrid Spatiotemporal Coherent Pulse Addition Of A Picosecond Flashlamp-Pumped Ndyag Laser.Pdf, Ahmad Azim Nov 2016

Hybrid Spatiotemporal Coherent Pulse Addition Of A Picosecond Flashlamp-Pumped Ndyag Laser.Pdf, Ahmad Azim

Ahmad Azim

We demonstrate active and passive coherent pulse addition in a flashlamp-pumped Nd:YAG amplifier chain for pumping OPCPA systems. The amplification of 200 ps pulses to 216 mJ is achieved with a 79% combination efficiency.

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Divided-Pulse Amplification To The Joule Level.Pdf, Ahmad Azim, Benjamin Webb, Nathan Bodnar, Michael Chini, Lawrence Shah, Martin Richardson Jun 2016

Divided-Pulse Amplification To The Joule Level.Pdf, Ahmad Azim, Benjamin Webb, Nathan Bodnar, Michael Chini, Lawrence Shah, Martin Richardson

Ahmad Azim

Divided-pulse amplification (DPA) has proven to be a valuable tool in scaling the peak power of diode-pumped ytterbium-doped amplifiers to beyond the single-pulse threshold for parasitic nonlinear effects. DPA enables the amplification of picosecond pulses in solid-state amplifiers with limited bandwidth beyond the single-pulse damage threshold. In this Letter, we demonstrate DPA of picosecond pulses in a flashlamp-pumped Nd:YAG amplifier for the first time, to the best of our knowledge, yielding a combined pulse energy of 167 mJ.

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Coherent Beam Combining Of Ultrashort Laser Pulses.Pdf, Ahmad Azim Apr 2016

Coherent Beam Combining Of Ultrashort Laser Pulses.Pdf, Ahmad Azim

Ahmad Azim

In this thesis, CBC of ultrashort laser pulses is investigated based upon the method known as divided-pulse amplification (DPA). Active, passive and hybrid DPA have been achieved in a flashlamp-pumped Nd:YAG laser seeded from a Ti:sapphire mode-locked laser. Picosecond pulses at a repetition rate of 2.5 Hz were amplified and combined to record energy of 216 mJ with a combination efficiency of 80%. Engineering of the Nd:YAG amplifier chain for high-efficiency energy extraction is presented. In addition, phasing of actively divided pulses with a CW pilot laser co-propagating with the pulsed beam is also demonstrated. Analysis of multiple DPA configurations …

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780 Nm Diode Lasers For Atomic Physics, Bryson Vivas, Simone Carpenter, Jenny Novak, Andrew M. C. Dawes May 2013

780 Nm Diode Lasers For Atomic Physics, Bryson Vivas, Simone Carpenter, Jenny Novak, Andrew M. C. Dawes

Andrew M C Dawes

This poster presents the results of the summer research project conducted by Bryson Vivas, Simone Carpenter, and Jenny Novak. The research was supervised by Dr. Andrew Dawes and conducted in the Photonics and Quantum Optics Lab of Pacific University.

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Optical Vortices Generated By Dislocations In A Cholesteric Liquid Crystal, D. Voloschenko, Oleg Lavrentovich Mar 2000

Optical Vortices Generated By Dislocations In A Cholesteric Liquid Crystal, D. Voloschenko, Oleg Lavrentovich

Oleg Lavrentovich

We report the observation of optical vortices in a laser beam propagating through the stripe pattern of a cholesteric liquid crystal. The liquid crystal is confined in a cell with homogeneous boundary conditions and forms a diffraction phase grating. Optical vortices are produced by edge dislocations of the cholesteric grating. The vortices show up as spots of zero light intensity in the diffraction maxima. There is one spot in each +1 and -1 diffraction maximum and two spots in diffraction maxima +2 and -2. (C) 2000 Optical Society of America. OCIS codes: 160.3710, 050.1940, 180.1790, 070.4690.

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