Investigation on laser-induced damage threshold of polycrystalline Fe:ZnSe with nanosecond-pulse-width pumping
Year: 2025
Type: article
Abstract: This paper presents a comparative investigation on laser-induced damage threshold (LIDT) of polycrystalline Fe:ZnSe pumped at 2.82 μm and ∼4.5 μm with pulse widths of several nanoseconds. The corresponding pump sources were a KTA optical parametric oscillator and a room-temperature Fe:ZnSe laser. The single-pass LIDTs at 2.82 μm (181 mJ, 8.0 ns) and ∼4.5 μm (53.4 mJ, 5.6 ns) were ∼1J/cm 2 (130 MW/cm 2 ) and ∼0.9 J/cm 2 (160 MW/cm 2 ), respectively. The LIDT decreased to an input peak power intensity of ∼0.48 J/cm 2 (60 MW/cm 2 ) at 2.82 μm if the Fe:ZnSe crystal was implemented in an oscillator during the lasing operation. The main reason that the Fe:ZnSe crystal was damaged at lower incident pump intensity was the higher intra-cavity intensity of the resonated ∼4.5 μm laser with shorter pulse width. The enhancement of the pump absorption and laser re-absorption increased the damage risk of the Fe:ZnSe crystal during the lasing operation. The LIDT of the Fe:ZnSe crystal is one of the key parameters for high-energy and high-intensity mid-infrared Fe:ZnSe lasers because it is the main limit for energy scaling.
Source: Infrared Physics & Technology
Authors: Xingbin Wei, Jing Xie, Song Zhang, Huaijin Ren, Wenlong Yin, Bin Kang, Tangjian Zhou, Jiayu Yi, Sikun Zhou, Xiafei Xu, Yonglong Lin, Mingyang Leng, Wenlin Dai, Mingyue Zhou, Yanhua Lu, Yinhong Sun, Juntao Wang, Yinchen Wu, Kun Ren, Jianli Shang
Institution: China Academy of Engineering Physics
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,000
OpenAlex ID: W4416055891