Self-Q-switched Er:Lu<sub>2</sub>O<sub>3</sub> laser at 2.74 µm

Meng Zhang; Yanru Yin; Lu Zhang; Baitao Zhang; Baitao Zhang; Kejian Yang; Kejian Yang; Jingliang He; Jingliang He; Tao Li; Tao Li; Tao Li; Tao Li

doi:10.1364/AO.481607

Applied Optics
Vol. 62,
Issue 6,
pp. 1462-1466
(2023)
•https://doi.org/10.1364/AO.481607

Self-Q-switched Er:Lu₂O₃ laser at 2.74 µm

Meng Zhang, Yanru Yin, Lu Zhang, Baitao Zhang, Kejian Yang, Jingliang He, and Tao Li

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Meng Zhang, Yanru Yin, Lu Zhang, Baitao Zhang, Kejian Yang, Jingliang He, and Tao Li, "Self-Q-switched Er:Lu₂O₃ laser at 2.74 µm," Appl. Opt. 62, 1462-1466 (2023)

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Table of Contents Category
- Lasers, Optical Amplifiers, and Laser Optics
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About this Article
History
- Original Manuscript: December 5, 2022
- Revised Manuscript: January 14, 2023
- Manuscript Accepted: January 16, 2023
- Published: February 10, 2023

Abstract

A diode-pumped self-Q-switched 2.74 µm Er:Lu₂O₃ crystal solid-state laser has been experimentally and theoretically studied. Without any additional modulation elements, stable self-Q-switched pulses with a pulse width of 145.3 ns, a repetition rate of 227.8 kHz, and an average output power of 877 mW were generated. Considering the excited-state absorption on the laser photons of the Er:Lu₂O₃ crystal, we have simulated the dynamic process of self-pulsed generation by solving the rate equations numerically. The simulation results are consistent with the typical characteristics of a Q-switched laser.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Parameters	Value	Parameters	Value
$σ_{21}$ ( ${c m}^{2}$ )	$0.8 \times 10^{- 20}$	$σ_{12}$ ( ${c m}^{2}$ )	$1.1 \times 10^{- 20}$
$c$ (m/s)	$2.99 \times 10^{8}$	$n$	1.883 [35]
$N_{T}$ ( $m o l / {c m}^{3}$ )	$1.86 \times 10^{21}$	$R$	0.9
$h ν_{P}$ (J)	$2.0353 \times 10^{- 19}$	$ω_{P}$ (µm)	150
$l_{c a v}$ (mm)	13	$l_{m e d}$ (mm)	10
$t_{r}$ (s)	$1.4563 \times 10^{- 10}$	$δ$	0.18
$τ_{2}$ (ms)	1.6	$τ_{1}$ (ms)	4

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