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Keywords = Q-switched Nd:YLF laser

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17 pages, 22269 KiB  
Review
Optical Crystals for 1.3 μm All-Solid-State Passively Q-Switched Laser
by Yanxin Shen, Xinpeng Fu, Cong Yao, Wenyuan Li, Yubin Wang, Xinrui Zhao, Xihong Fu and Yongqiang Ning
Crystals 2022, 12(8), 1060; https://doi.org/10.3390/cryst12081060 - 29 Jul 2022
Cited by 12 | Viewed by 3264
Abstract
In recent years, optical crystals for 1.3 μm all-solid-state passively Q-switched lasers have been widely studied due to their eye-safe band, atmospheric transmission characteristics, compactness, and low cost. They are widely used in the fields of high-precision laser radar, biomedical applications, and fine [...] Read more.
In recent years, optical crystals for 1.3 μm all-solid-state passively Q-switched lasers have been widely studied due to their eye-safe band, atmospheric transmission characteristics, compactness, and low cost. They are widely used in the fields of high-precision laser radar, biomedical applications, and fine processing. In this review, we focus on three types of optical crystals used as the 1.3 μm laser gain media: neodymium-doped vanadate (Nd:YVO4, Nd:GdVO4, Nd:LuVO4, neodymium-doped aluminum-containing garnet (Nd:YAG, Nd:LuAG), and neodymium-doped gallium-containing garnet (Nd:GGG, Nd:GAGG, Nd:LGGG). In addition, other crystals such as Nd:KGW, Nd:YAP, Nd:YLF, and Nd:LLF are also discussed. First, we introduce the properties of the abovementioned 1.3 μm laser crystals. Then, the recent advances in domestic and foreign research on these optical crystals are summarized. Finally, the future challenges and development trend of 1.3 μm laser crystals are proposed. We believe this review will provide a comprehensive understanding of the optical crystals for 1.3 μm all-solid-state passively Q-switched lasers. Full article
(This article belongs to the Special Issue Frontiers of Semiconductor Lasers)
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9 pages, 6112 KiB  
Article
Q-Switched Operation with Carbon-Based Saturable Absorbers in a Nd:YLF Laser
by Rosa Weigand, Margarita Sánchez Balmaseda and José Manuel Guerra Pérez
Appl. Sci. 2015, 5(3), 566-574; https://doi.org/10.3390/app5030566 - 11 Sep 2015
Cited by 2 | Viewed by 4971
Abstract
We have numerically studied the influence of the absorption modulation depth of carbon-based saturable absorbers (graphene and carbon nanotubes (CNTs)) on the Q-switched regime of a diode-pumped Nd:YLF laser. A short-length cavity was used with an end mirror on which CNTs or mono- [...] Read more.
We have numerically studied the influence of the absorption modulation depth of carbon-based saturable absorbers (graphene and carbon nanotubes (CNTs)) on the Q-switched regime of a diode-pumped Nd:YLF laser. A short-length cavity was used with an end mirror on which CNTs or mono- or bi-layer graphene were deposited, forming a saturable absorber mirror (SAM). Using a standard model, the generated energy per pulse was calculated, as well as the pulse duration and repetition rate. The results show that absorbers with higher modulation depths, i.e., graphene, deliver higher energy pulses at lower repetition rates. However, the pulse duration did not have a monotonic behavior and reaches a minimum for a given low value of the modulation depth typical of CNTs. Full article
(This article belongs to the Special Issue Diode-Pumped, Ultra-Short Pulse Lasers)
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