Modulation of laser damage by temporal shaping of double picosecond pulses

We propose a temporally shaped double-picosecond-pulse train at a sub-nanosecond scale to control the damage dynamics of optical glass. Both damage threshold and morphology are significantly modulated by pulse-train shaping. The ramp-up-shaped train effectively increases its damage threshold and dec...

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Bibliographic Details
Published in:Optics letters 2022-08, Vol.47 (15), p.3856-3859
Main Authors: Liu, Wenfeng, Sun, Mingying, Cui, Zijian, Guo, Yajing, Jiao, Zhaoyang, Wu, Rong, Zhu, Jianqiang
Format: Article
Language:English
Subjects:
Fluence
Laser damage
Modulation
Optical glass
Picosecond pulses
Yield point
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Summary:We propose a temporally shaped double-picosecond-pulse train at a sub-nanosecond scale to control the damage dynamics of optical glass. Both damage threshold and morphology are significantly modulated by pulse-train shaping. The ramp-up-shaped train effectively increases its damage threshold and decreases the damage density and size, which clearly shows that a pump pulse with optimized fluence has a strong positive modification of damage precursors. Furthermore, the temporal evolution of damage modulation is experimentally revealed by varying the interval of pump-probe pulses, and after pump exposure with optimized fluence, enhancement of the probe threshold reaches the maximum at a delay of about 260 ps.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.466022