scholarly journals 500-kHz Level High Energy Double-Pass Nd:YVO4 Picosecond Amplifier with Optic–Optic Efficiency of 51%

2019 ◽  
Vol 9 (2) ◽  
pp. 219
Author(s):  
Xuesheng Liu ◽  
Huan He ◽  
Yiheng Song ◽  
Congcong Wang ◽  
Zhiyong Wang
Keyword(s):  
Pulse Energy ◽  
Beam Quality ◽  
Maximum Output Power ◽  
Picosecond Laser ◽  
Output Pulse ◽  
High Energy ◽  
Maximum Output ◽  
High Pulse Energy ◽  
Double Pass ◽  
High Pulse

We have demonstrated a high pulse energy and high optic–optic efficiency double-pass picosecond (ps) master oscillator power amplifier system of 1064 nm at a pulse repetition rate of 500 kHz. A 500 kHz, 7.68 μJ picosecond laser is used as the seed laser. Through one stage double-pass traveling-wave amplifier, a maximum output power of 16.19 W at a pump power of 31.7 W is generated with the optic–optic efficiency of 51.07%. The output pulse duration is 17.6 ps, corresponding to the pulse energy of 32.38 μJ. The beam quality factor M 2 were measured to be 1.28 and 1.17 along the x, y axis direction, respectively.

scholarly journals A high-beam-quality, high-pulse-energy picosecond laser system for high precision ultra-remote laser ranging

2019 ◽  
Vol 64 (17) ◽  
pp. 1761-1762 ◽  
Author(s):  
Zhongwei Fan ◽  
Yutao Huang ◽  
Xiaochao Yan ◽  
Guangyan Guo ◽  
en Zh ◽  
...  
Keyword(s):  
High Precision ◽  
Pulse Energy ◽  
Beam Quality ◽  
Laser System ◽  
Picosecond Laser ◽  
Laser Ranging ◽  
High Pulse Energy ◽  
High Beam ◽  
High Pulse ◽  
High Beam Quality

scholarly journals High pulse energy fiber/solid-slab hybrid picosecond pulse system for material processing on polycrystalline diamonds

2018 ◽  
Vol 6 ◽  
Author(s):  
Wei Chen ◽  
Bowen Liu ◽  
Youjian Song ◽  
Lu Chai ◽  
Qianjin Cui ◽  
...  
Keyword(s):  
Material Processing ◽  
Pulse Energy ◽  
Beam Quality ◽  
Picosecond Pulse ◽  
High Pulse Energy ◽  
Central Wavelength ◽  
Picosecond Pulses ◽  
High Pulse ◽  
Fiber Mode ◽  
Mode Locked Laser

We demonstrate an all polarization-maintaining (PM) fiber mode-locked laser seeded, hybrid fiber/solid-slab picosecond pulse laser system which outputs $40~\unicode[STIX]{x03BC}\text{J}$, 10 ps pulses at the central wavelength of 1064  nm. The beam quality factors $M^{2}$ in the unstable and stable directions are 1.35 and 1.31, respectively. $15~\unicode[STIX]{x03BC}\text{J}$ picosecond pulses at the central wavelength of 355 nm are generated through third harmonic generation (THG) by using two $\text{LiB}_{3}\text{O}_{5}$ (LBO) crystals, in order to get better processing efficiency on polycrystalline diamonds. The high pulse energy and beam quality of these ultraviolet (UV) picosecond pulses are confirmed by latter experiments of material processing on polycrystalline diamonds. This scheme which combines the advantages of the all PM fiber mode-locked laser and the solid-slab amplifier enables compact, robust and chirped pulse amplification-free amplification with high power picosecond pulses.

scholarly journals Wavelength-Tunable Nonlinear Mirror Mode-Locked Laser Based on MgO-Doped Lithium Niobate

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 861
Author(s):  
Lina Zhao ◽  
Luyang Tong ◽  
Fangxin Cai ◽  
Ye Yuan ◽  
Yangjian Cai
Keyword(s):  
Lithium Niobate ◽  
Continuous Wave ◽  
Maximum Output Power ◽  
Picosecond Laser ◽  
Output Pulse ◽  
Mode Locking ◽  
Maximum Output ◽  
Wavelength Tunable ◽  
Mirror Mode ◽  
Mode Locked Laser

We present a high-power, wavelength-tunable picosecond Yb3+: CaGdAlO4 (Yb:CALGO) laser based on MgO-doped lithium niobate (MgO:LN) nonlinear mirror mode locking. The output wavelength in the continuous wave (CW) regime is tunable over a 45 nm broad range. Mode locking with a MgO:LN nonlinear mirror, the picosecond laser is tunable over 23 nm from 1039 to 1062 nm. The maximum output power of the mode-locked laser reaches 1.46 W, and the slope efficiency is 18.6%. The output pulse duration at 1049 nm is 8 ps. The laser repetition rate and bandwidth are 115.5 MHz and 1.7 nm, respectively.

scholarly journals Two-micron all-fiberized passively mode-locked fiber lasers with high-energy nanosecond pulse

2020 ◽  
Vol 8 ◽  
Author(s):  
Meng Wang ◽  
Yijian Huang ◽  
Zongpeng Song ◽  
Jincheng Wei ◽  
Jihong Pei ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Pulse Duration ◽  
Output Power ◽  
Saturable Absorber ◽  
Pulse Energy ◽  
Fiber Lasers ◽  
Maximum Output Power ◽  
High Energy ◽  
Maximum Output ◽  
Stable Mode

We report on mode-locked thulium-doped fiber lasers with high-energy nanosecond pulses, relying on the transmission in a semiconductor saturable absorber (SESA) and a carbon nanotube (CNTs-PVA) film separately. A section of an SMF–MMF–SMF structure multimode interferometer with a transmission peak wavelength of ∼2003 nm was used as a wavelength selector to fix the laser wavelength. When the SESA acted as a saturable absorber (SA), the mode-locked fiber laser had a maximum output power of ∼461 mW with a pulse energy of ∼0.14 μJ and a pulse duration of ∼9.14 ns. In a CNT-film-based mode-locked fiber laser, stable mode-locked pulses with the maximum output power of ∼46 mW, pulse energy of ∼26.8 nJ and pulse duration of ∼9.3 ns were obtained. To the best of our knowledge, our experiments demonstrated the first 2 μm region ‘real’ SA-based dissipative soliton resonance with the highest mode-locked pulse energy from a ‘real’ SA-based all-fiberized resonator.

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