Search by keywords or author
• Chinese Optics Letters
• Vol. 20, Issue 3, 031401 (2022)
Jun Guo1, Jian Liu2, Jie Xu1, Bin Xu3, Yuchong Ding4、*, Xiaodan Wang5, Xiaodong Xu1、**, and Jun Xu2
Author Affiliations
• 1Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
• 2School of Physics Science and Engineering, Institute for Advanced Study, Tongji University, Shanghai 200092, China
• 3Department of Electronic Engineering, Xiamen University, Xiamen 361005, China
• 4Research & Development Center of Material and Equipment, 26th Research Institute, China Electronics Technology Group Corporation, Chongqing 400060, China
• 5School of Physics Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, China
• show less
Jun Guo, Jian Liu, Jie Xu, Bin Xu, Yuchong Ding, Xiaodan Wang, Xiaodong Xu, Jun Xu. High performances of diode-end-pumped Nd:SrAl12O19 lasers operated in continuous-wave and passively $Q$-switched regimes[J]. Chinese Optics Letters, 2022, 20(3): 031401 Copy Citation Text show less

Abstract

A good thermo-optic property of strontium dodeca-aluminum oxide ($SrAl12O12$, SRA) host material is very advantageous to the development of high-performance lasers by doping rare-earth ions for gain medium. In this work, we report on diode-end-pumped high-performance continuous-wave and passively Q-switched Nd:SRA lasers. For continuous-wave operation, a maximum output power of 6.45 W is achieved at 1049 nm with a slope efficiency of about 41.6%. Using a $Y3Al5O12$ (YAG) etalon, we have firstly achieved a 1066 nm laser with a maximum output power of 4.15 W and a slope efficiency of about 27%, to the best of our knowledge. For passively Q-switched operation, with $Cr4+:YAG$ as a saturable absorber, a maximum average output power of 1.82 W was achieved with the shortest pulse width of 18.2 ns at pulse repetition rate of 22.9 kHz. The single-pulse energy and pulse peak power were 79.4 μJ and 4.3 kW. This work has further verified that the Nd:SRA crystal is very promising for high-performance laser generation.

1. Introduction

During past years, disordered laser material with a broadened emission spectrum has attracted great attention because of its advantages in achieving laser sources with tunable lasing wavelengths. For example, in early 2004, Rico et al. reported a wavelength tunable operation in a disordered $Yb:NaGd(WO4)2$ laser[1]. In 2009, Yu et al. reported a dual-wavelength operation in a disordered $Nd:Ca3Nb1.5G3.5O12$ (Nd:CNGG) laser[2]. $Nd:La3Ga5SiO14$, one of the oxyorthosilicate materials, has been demonstrated to tunably lase at about 900 nm[3]. Another disordered oxyorthosilicate material, $Nd:LuYSiO5$ crystal, was also reported to have many lasing possibilities at various emission lines[4]. Disordered laser material has another very important advantage, namely generating a femtosecond ultrashort pulse laser. For instance, in 2009, Xie et al. demonstrated a 900 fs laser using a $Nd:Ca3Li0.275Nb1.775Ga2.95O12$ (Nd:CLNGG) disordered crystal[5]. In 2014, Qin et al. reported a mode-locked disordered $Nd,Y:CaF2$ laser with a pulse time duration down to 103 fs[6]. In 2016, Ma et al. achieved a mode-locked $Nd:Ca3La2(BO3)4$ disordered laser with a pulse width as short as 79 fs[7].

Copy Citation Text
Jun Guo, Jian Liu, Jie Xu, Bin Xu, Yuchong Ding, Xiaodan Wang, Xiaodong Xu, Jun Xu. High performances of diode-end-pumped Nd:SrAl12O19 lasers operated in continuous-wave and passively $Q$-switched regimes[J]. Chinese Optics Letters, 2022, 20(3): 031401