Intense and Superflat White Laser with 700-nm 3-dB Bandwidth and 1-mJ Pulse Energy Enabling Single-Shot Subpicosecond Pulse Laser Spectroscopy

Lihong Hong; Haiyao Yang; Liqiang Liu; Mingzhou Li; Yuanyuan Liu; Baoqin Chen; Huakang Yu; Wenbo Ju; Zhi-Yuan Li

doi:10.34133/research.0210

Intense and Superflat White Laser with 700-nm 3-dB Bandwidth and 1-mJ Pulse Energy Enabling Single-Shot Subpicosecond Pulse Laser Spectroscopy

Research (Wash D C). 2023 Aug 15:6:0210. doi: 10.34133/research.0210. eCollection 2023.

Authors

Lihong Hong¹, Haiyao Yang¹, Liqiang Liu¹, Mingzhou Li¹, Yuanyuan Liu¹, Baoqin Chen¹, Huakang Yu¹, Wenbo Ju¹, Zhi-Yuan Li^{1

2}

Affiliations

¹ School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641, China.
² State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.

Abstract

An optical spectrometer is a basic spectral instrument that probes microscopic physical and chemical properties of macroscopic objects but generally suffers from difficulty in broadband time-resolved measurement. In this work, we report the creation of ultrabroadband white-light laser with a 3-dB bandwidth covering 385 to 1,080 nm, pulse energy of 1.07 mJ, and pulse duration of several hundred femtoseconds by passing 3-mJ pulse energy, 50-fs pulse duration Ti:Sapphire pulse laser through a cascaded fused silica plate and chirped periodically poled lithium niobate crystal. We utilize this unprecedented superflat, ultrabroadband, and intense femtosecond laser light source to build a single-shot (i.e., single-pulse) subpicosecond pulse laser ultraviolet-visible-near-infrared spectrometer and successfully measure various atomic and molecular absorption spectra. The single-shot ultrafast spectrometer may open up a frontier to monitor simultaneously the ultrafast dynamics of multiple physical and chemical processes in various microscopic systems.