60 mm-aperture high average output power Nd:YAG composite ceramic disk laser

Du, Jinyu; Yu, Yi; An, Xiangchao; Shang, Jianli; Lei, Jun; Jiang, Jianfeng; Jiang, Lin; Lv, Wei; Fan, Guoliang; Gao, Qingsong

doi:10.1016/j.ijleo.2018.06.129

Cited by 1 publication

(1 citation statement)

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“…The attempt to power-scale laser systems has centered on two different techniques for years [2]. One of the techniques is the improvement of each laser system component, such as the lasing mode [3], the pumping technology, and the development of near-diffraction suppression systems [4][5][6][7][8]. Nevertheless, this approach has significant drawbacks due to the nonlinearity effect [9], and the broadening of the spectrum for high-power lasers is unavoidable, severely limiting the output power of the laser channel [10,11].…”

Section: Introductionmentioning

confidence: 99%

Design of a High-Efficiency Multilayer Dielectric Diffraction Grating with Enhanced Laser Damage Threshold

Pham

et al. 2022

Nanomaterials

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Diffraction gratings are becoming increasingly widespread in optical applications, notably in lasers. This study presents the work on the characterization and evaluation of Multilayer Dielectric Diffraction Gratings (MDG) based on the finite element method using Comsol MultiPhysics software. The optimal multilayer dielectric diffraction grating structure using a rectangular three-layer structure consisting of an aluminum oxide Al2O3 layer sandwiched between two silicon dioxide SiO2 layers on a multilayer dielectric mirror is simulated. Results show that this MDG for non-polarized lasers at 1064 nm with a significantly enhanced −1st diffraction efficiency of 97.4%, reaching 98.3% for transverse-electric (TE) polarization and 96.3% for transverse-magnetic (TM) polarization. This design is also preferable in terms of the laser damage threshold (LDT) because most of the maximum electric field is spread across the high LDT material SiO2 for TE polarization and scattered outside the grating for TM polarization. This function allows the system to perform better and be more stable than normal diffraction grating under a high-intensity laser.

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