The Experts below are selected from a list of 41391 Experts worldwide ranked by ideXlab platform
Guillaume Laurent - One of the best experts on this subject based on the ideXlab platform.
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high Energy khz picosecond hybrid yb doped chirped pulse amplifier
Optics Express, 2015Co-Authors: Chunlin Chang, Peter Krogen, Kyunghan Hong, Luis E Zapata, Jeffrey Moses, Annelaure Calendron, Houkun Liang, Gregory J Stein, Phillip D Keathley, Guillaume LaurentAbstract:We report on a diode-pumped, hybrid Yb-doped chirped-pulse amplification (CPA) laser system with a compact pulse stretcher and compressor, consisting of Yb-doped fiber preamplifiers, a room-temperature Yb:KYW regenerative amplifier (RGA), and cryogenic Yb:YAG multi-pass amplifiers. The RGA provides a relatively broad amplification bandwidth and thereby a long pulse duration to mitigate B-integral in the CPA chain. The ~1030-nm laser pulses are amplified up to 70 mJ at 1-kHz repetition rate, currently limited by available optics apertures, and then compressed to ~6 ps with high efficiency. The near-diffraction-limited beam focusing quality is demonstrated with Mx2 = 1.1 and My2 = 1.2. The shot-to-shot Energy Fluctuation is as low as ~1% (rms), and the long-term Energy drift and beam pointing stability for over 8 hours measurement are ~3.5% and <6 μrad (rms), respectively. To the best of our knowledge, this hybrid laser system produces the most energetic picosecond pulses at kHz repetition rates among rod-type laser amplifiers. With an optically synchronized Ti:sapphire seed laser, it provides a versatile platform optimized for pumping optical parametric chirped-pulse amplification systems as well as driving inverse Compton scattered X-rays.
Chunlin Chang - One of the best experts on this subject based on the ideXlab platform.
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high Energy khz picosecond hybrid yb doped chirped pulse amplifier
Optics Express, 2015Co-Authors: Chunlin Chang, Peter Krogen, Kyunghan Hong, Luis E Zapata, Jeffrey Moses, Annelaure Calendron, Houkun Liang, Gregory J Stein, Phillip D Keathley, Guillaume LaurentAbstract:We report on a diode-pumped, hybrid Yb-doped chirped-pulse amplification (CPA) laser system with a compact pulse stretcher and compressor, consisting of Yb-doped fiber preamplifiers, a room-temperature Yb:KYW regenerative amplifier (RGA), and cryogenic Yb:YAG multi-pass amplifiers. The RGA provides a relatively broad amplification bandwidth and thereby a long pulse duration to mitigate B-integral in the CPA chain. The ~1030-nm laser pulses are amplified up to 70 mJ at 1-kHz repetition rate, currently limited by available optics apertures, and then compressed to ~6 ps with high efficiency. The near-diffraction-limited beam focusing quality is demonstrated with Mx2 = 1.1 and My2 = 1.2. The shot-to-shot Energy Fluctuation is as low as ~1% (rms), and the long-term Energy drift and beam pointing stability for over 8 hours measurement are ~3.5% and <6 μrad (rms), respectively. To the best of our knowledge, this hybrid laser system produces the most energetic picosecond pulses at kHz repetition rates among rod-type laser amplifiers. With an optically synchronized Ti:sapphire seed laser, it provides a versatile platform optimized for pumping optical parametric chirped-pulse amplification systems as well as driving inverse Compton scattered X-rays.
Mir Mehedi Faruk - One of the best experts on this subject based on the ideXlab platform.
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Energy Fluctuation of ideal fermi gas trapped under generic power law potential u sum_ i 1 d c_i vert x_ i a_ i vert n_ i in d dimensions
Communications in Theoretical Physics, 2016Co-Authors: Mir Mehedi Faruk, Md Muktadi Rahma, Dwaipaya Debnath, Md Sakhawat Hossai HimelAbstract:Energy Fluctuation of ideal Fermi gas trapped under generic power law potential has been calculated in arbitrary dimensions. Energy Fluctuation is scrutinized further in the degenerate limit μ KBT with the help of Sommerfeld expansion. The dependence of Energy Fluctuation on dimensionality and power law potential is studied in detail. Most importantly our general result can not only exactly reproduce the recently published result regarding free and harmonically trapped ideal Fermi gas in d = 3 but also can describe the outcome for any power law potential in arbitrary dimension.
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a proof of the biswas mitra bhattacharyya conjecture for the ideal quantum gas trapped under the generic power law potential in d dimensions
Journal of Statistical Mechanics: Theory and Experiment, 2016Co-Authors: Mir Mehedi Faruk, Muktadi RahmaAbstract:The well known relation for the ideal classical gas , which does not remain valid for quantum systems, is revisited. A new connection is established between the Energy Fluctuation and specific heat for quantum gases, which is valid in both the classical limit and the degenerate quantum regime. Most importantly, the proposed Biswas–Mitra–Bhattacharyya conjecture (Biswas et al 2015 J. Stat. Mech. P03013) relating the hump in Energy Fluctuation and the discontinuity of specific heat is essentially proved and made precise in this manuscript.
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a proof to biswas mitra bhattacharyya conjecture for ideal quantum gas trapped under generic power law potential u sum_ i 1 d c_i frac x_i a_i n_i in d dimension
arXiv: Quantum Gases, 2015Co-Authors: Mir Mehedi Faruk, Md Muktadi RahmaAbstract:The well known relation for ideal classical gas $\Delta \epsilon^2=kT^2 C_V$ which does not remain valid for quantum system is revisited. A new connection is established between Energy Fluctuation and specific heat for quantum gases, valid in the classical limit and the degenerate quantum regime as well. Most importantly the proposed Biswas-Mitra-Bhattacharyya (BMB) conjecture (Biswas $et.$ $al.$, J. Stat. Mech. P03013, 2015.) relating hump in Energy Fluctuation and discontinuity of specific heat is proved and precised in this manuscript.
Kyunghan Hong - One of the best experts on this subject based on the ideXlab platform.
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high Energy khz picosecond hybrid yb doped chirped pulse amplifier
Optics Express, 2015Co-Authors: Chunlin Chang, Peter Krogen, Kyunghan Hong, Luis E Zapata, Jeffrey Moses, Annelaure Calendron, Houkun Liang, Gregory J Stein, Phillip D Keathley, Guillaume LaurentAbstract:We report on a diode-pumped, hybrid Yb-doped chirped-pulse amplification (CPA) laser system with a compact pulse stretcher and compressor, consisting of Yb-doped fiber preamplifiers, a room-temperature Yb:KYW regenerative amplifier (RGA), and cryogenic Yb:YAG multi-pass amplifiers. The RGA provides a relatively broad amplification bandwidth and thereby a long pulse duration to mitigate B-integral in the CPA chain. The ~1030-nm laser pulses are amplified up to 70 mJ at 1-kHz repetition rate, currently limited by available optics apertures, and then compressed to ~6 ps with high efficiency. The near-diffraction-limited beam focusing quality is demonstrated with Mx2 = 1.1 and My2 = 1.2. The shot-to-shot Energy Fluctuation is as low as ~1% (rms), and the long-term Energy drift and beam pointing stability for over 8 hours measurement are ~3.5% and <6 μrad (rms), respectively. To the best of our knowledge, this hybrid laser system produces the most energetic picosecond pulses at kHz repetition rates among rod-type laser amplifiers. With an optically synchronized Ti:sapphire seed laser, it provides a versatile platform optimized for pumping optical parametric chirped-pulse amplification systems as well as driving inverse Compton scattered X-rays.
Phillip D Keathley - One of the best experts on this subject based on the ideXlab platform.
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high Energy khz picosecond hybrid yb doped chirped pulse amplifier
Optics Express, 2015Co-Authors: Chunlin Chang, Peter Krogen, Kyunghan Hong, Luis E Zapata, Jeffrey Moses, Annelaure Calendron, Houkun Liang, Gregory J Stein, Phillip D Keathley, Guillaume LaurentAbstract:We report on a diode-pumped, hybrid Yb-doped chirped-pulse amplification (CPA) laser system with a compact pulse stretcher and compressor, consisting of Yb-doped fiber preamplifiers, a room-temperature Yb:KYW regenerative amplifier (RGA), and cryogenic Yb:YAG multi-pass amplifiers. The RGA provides a relatively broad amplification bandwidth and thereby a long pulse duration to mitigate B-integral in the CPA chain. The ~1030-nm laser pulses are amplified up to 70 mJ at 1-kHz repetition rate, currently limited by available optics apertures, and then compressed to ~6 ps with high efficiency. The near-diffraction-limited beam focusing quality is demonstrated with Mx2 = 1.1 and My2 = 1.2. The shot-to-shot Energy Fluctuation is as low as ~1% (rms), and the long-term Energy drift and beam pointing stability for over 8 hours measurement are ~3.5% and <6 μrad (rms), respectively. To the best of our knowledge, this hybrid laser system produces the most energetic picosecond pulses at kHz repetition rates among rod-type laser amplifiers. With an optically synchronized Ti:sapphire seed laser, it provides a versatile platform optimized for pumping optical parametric chirped-pulse amplification systems as well as driving inverse Compton scattered X-rays.