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Frank W Wise - One of the best experts on this subject based on the ideXlab platform.
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generation of 150 w average and 1 mw peak power picosecond pulses from a rod type fiber master oscillator power Amplifier
Journal of The Optical Society of America B-optical Physics, 2014Co-Authors: Zhi Zhao, Bruce Dunham, Frank W WiseAbstract:We report on the direct amplification of picosecond pulses to megawatt peak power and 150 W average power using a Yb-doped rod-type fiber master oscillator power Amplifier. 3 ps pulses at 50 MHz repetition rate are amplified in a 55 cm rod-type fiber Amplifier to produce linearly polarized pulses with 3 μJ pulse energy and 1 MW peak power. These results extend megawatt picosecond fiber Amplifiers to the 100 W average power regime for the first time. Frequency doubling of the pulses yields 70 W green average power, 1.4 μJ pulse energy, and 500 kW peak power.
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scaling of femtosecond yb doped fiber Amplifiers to tens of microjoule pulse energy via nonlinear chirped pulse amplification
Optics Letters, 2007Co-Authors: Lyuba Kuznetsova, Frank W WiseAbstract:We demonstrate that the compensation of self-phase modulation by third-order dispersion can be exploited in the design of fiber Amplifiers with tens of microjoules pulse energy. At the highest energies, the amplified pulse accumulates nonlinear phase shift as large as 17 π. Gain-narrowing occurs in the final Amplifier stage, but shorter pulses are still generated with larger nonlinear phase shifts. A large-mode-area Yb-doped photonic crystal fiber Amplifier generates diffraction-limited 30 μJ pulses, which are compressed to 240fs duration. These are converted to the second harmonic with 48% conversion efficiency, as expected theoretically, which confirms the pulse quality.
O Mahra - One of the best experts on this subject based on the ideXlab platform.
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gain and noise figure enhancement of er 3 yb 3 co doped fiber raman hybrid Amplifier
Optical Materials, 2016Co-Authors: O MahraAbstract:Abstract An Er/Yb co-doped fiber/Raman hybrid Amplifier (HA) is proposed and studied theoretically and analytically to improve the gain and noise figure of optical Amplifiers. The calculations are performed under a uniform dopant and steady-state conditions. The initial energy transfer efficiency for Er/Yb co-doped fiber Amplifier (EYDFA) is introduced, while the amplified spontaneous emission (ASE) is neglected. The glass fiber used for both Er/Yb and Raman Amplifiers is phosphate. Different pump powers are used for both EYDFA and RA with 1 μW input signal power, 1 m length of Er/Yb Amplifier and 25 km length of Raman Amplifier (RA). The proposed model is validated for Er/Yb co-doped Amplifier and Raman Amplifier separately by comparing the calculating results with the experimental data. A high gain and low noise figure at 200 mW Raman pump power and 500 mW Er/Yb pump power are obtained for the proposed HA as compared with the experimental results of EYDFA, Raman Amplifier and the EDFA/Raman hybrid Amplifier.
B Tang - One of the best experts on this subject based on the ideXlab platform.
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multiterawatt laser system based on optical parametric chirped pulse amplification
Optics Letters, 2002Co-Authors: Zhizhan Xu, Haihe Lu, Ruxin Li, Zhengquan Zhang, Wenqi Zhang, Yuxin Leng, B TangAbstract:A compact multiterawatt laser system based on optical parametric chirped pulse amplification is demonstrated. Chirped pulses are amplified from 20 pJ to 900 mJ by two lithium triborate optical parametric preAmplifiers and a final KDP optical parametric power Amplifier with a pump energy of 5 J at 532 nm from Nd:YAG-Nd: glass hybrid Amplifiers, After compression, we obtained a final output of 570-mJ-155-fs pulses with a peak power of 3.67 TW, which is the highest output power from an optical parametric chirped pulse amplification laser, to the best of our knowledge. (C) 2002 Optical Society of America.
H Daido - One of the best experts on this subject based on the ideXlab platform.
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high energy high contrast multiterawatt laser pulses by optical parametric chirped pulse amplification
Optics Letters, 2007Co-Authors: Hiromitsu Kiriyama, Michiaki Mori, Yoshiki Nakai, Yoichi Yamamoto, Manabu Tanoue, Atsushi Akutsu, T Shimomura, Shuji Kondo, Shuhei Kanazawa, H DaidoAbstract:We describe a compact, reliable, high-power, and high-contrast noncollinear optical parametric chirped-pulse Amplifier system. With a broadband Ti:sapphire oscillator and grating-based stretching and compression, the chirped pulses are amplified from 0.1 nJ to 122 mJ in type I beta-barium borate optical parametric chirped-pulse Amplifiers with a total gain of over 10(9) at 10 Hz repetition rate. Pulse compression down to 19-fs duration achieved after amplification indicates a peak power of 3.2 TW at an average power of 0.62 W. The prepulse contrast is measured to be less than 10(-8) on picosecond time scales.
K S E Eikema - One of the best experts on this subject based on the ideXlab platform.
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generation of few cycle terawatt light pulses using optical parametric chirped pulse amplification
Optics Express, 2005Co-Authors: S Witte, R T Zinkstok, W Hogervorst, K S E EikemaAbstract:We demonstrate the generation of 9.8±0.3 fs laser pulses with a peak power exceeding one terawatt at 30 Hz repetition rate, using optical parametric chirped pulse amplification. The Amplifier is pumped by 140 mJ, 60 ps pulses at 532 nm, and amplifies seed pulses from a Ti:Sapphire oscillator to 23 mJ/pulse, resulting in 10.5 mJ/pulse after compression while amplified fluorescence is kept below 1%. We employ grating-based stretching and compression in combination with an LCD phase-shaper, allowing compression close to the Fourier limit of 9.3 fs.