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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
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.
Divided-Pulse Amplification To The Joule Level.Pdf, Ahmad Azim, Benjamin Webb, Nathan Bodnar, Michael Chini, Lawrence Shah, Martin Richardson
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.
Coherent Beam Combining Of Ultrashort Laser Pulses.Pdf, Ahmad Azim
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 …