Wei Chen, Bowen Liu, Youjian Song, Lu Chai, Qianjin Cui, Qingjing Liu, Chingyue Wang, Minglie Hu. High pulse energy fiber/solid-slab hybrid picosecond pulse system for material processing on polycrystalline diamonds[J]. High Power Laser Science and Engineering, 2018, 6(2): 02000e18
- High Power Laser Science and Engineering
- Vol. 6, Issue 2, 02000e18 (2018)
Fig. 1. Setup of the all PM fiber mode-locked laser. ISO: isolator, WDM: wavelength division multiplexer, SESAM: semiconductor saturable absorber mirror, FBG: fiber Bragg grating, PD: photonics detector, SG: signal generator, AOM: acoustic optical modulator, RF signal: radio frequency signal.
Fig. 2. Configuration of the ultraviolet picosecond pulse laser system.
Fig. 3. Output characteristics of the all PM fiber pulse seed source. (a) Spectrum profiles, the inset shows the long term stability of the seed pulses (in the 10% output port) in 2 h. (b) Autocorrelation trace and its Gaussian fitting.
Fig. 4. Output characteristics of the all slab amplifier. (a) Measured (dots) and calculated (line) output power of the slab amplifier. (b) Long term stability of the slab amplifier in 2 h. (c) Beam radius and profile. (d) Autocorrelation trace and its Gaussian fitting.
Fig. 5. SEM images of laser-cut grooves on the diamond surface by 355 nm picosecond pulses with (a) 
at the repetition rate of 500 kHz (the corresponding pulse energy is 
) and (b) 
at the repetition rate of 10 MHz (the corresponding pulse energy is 
), respectively.
at the repetition rate of 500 kHz (the corresponding pulse energy is ) and (b) at the repetition rate of 10 MHz (the corresponding pulse energy is ), respectively. 
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