Compact 19 kW/8 ns pulse Nd:YAG/V:YAG laser source at 1.32 µm

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00386330" target="_blank" >RIV/68407700:21340/25:00386330 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1117/12.3056156" target="_blank" >https://doi.org/10.1117/12.3056156</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.3056156" target="_blank" >10.1117/12.3056156</a>

Result language

angličtina

Original language name

Compact 19 kW/8 ns pulse Nd:YAG/V:YAG laser source at 1.32 µm

Original language description

We present a miniature passively Q-switched diode-pumped laser generating stable nanosecond pulses in the spectral region of 1.32 µm with pulse energy exceeding 0.1 mJ. Main advantages of this radiation is the higher eye safety due to higher absorption in liquid water and lower background radiation intensity thanks to higher absorption in atmospheric water vapour compared to 1.06 µm radiation. Therefore, such a system could serve as a compact laser source for LIDAR applications such as drone tracking in counter-drone defense. Described laser design based on separate Nd:YAG and V:YAG crystals, operating at a wavelength of 1318 nm, was introduced earlier. Currently, we present a more compact laser with a bigger pumping spot size and simple system for resonator adjustment. A Nd:YAG crystal (8 mm long) was used as a gain medium, and a V:YAG crystal ([100]-cut, T0 = 85 % @ 1.3 µm) played the role of a saturable absorber. The laser resonator mirrors were deposited on the Nd:YAG crystal (pumping mirror highly reflecting at 1.3 µm radiation and highly transparent for 808 nm) and on the V:YAG crystal (output coupler with a reflectivity of 85 % at 1.3 µm). For longitudinal Nd:YAG pumping, a fiber-coupled laser diode was used. Two aspheric lenses, f = 8 and 11 mm, were used to focus pumping radiation into the Nd:YAG crystal (the pumping beam spot was ~ 570 µm in diameter). In the range of tested pumping pulse frequencies, the laser generated ~ 8 ns long pulses (FWHM). The maximum output pulse energy achieved was 146 µJ, corresponding to the maximum peak power of 19 kW. The pulse energy reliably reached 120 µJ for pumping frequencies up to 400 Hz. 2025 SPIE. All rights reserved.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20201 - Electrical and electronic engineering

Project

<a href="/en/project/FW01010219" target="_blank" >FW01010219: Multicomponent single crystal materials for solid state lasers</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proc. SPIE 13532, High-power, High-energy Lasers, and Ultrafast Optical Technologies II

ISBN

978-1-5106-8860-5

ISSN

0277-786X

e-ISSN

1996-756X

Number of pages

5

Pages from-to

—

Publisher name

SPIE

Place of publication

Bellingham (stát Washington)

Event location

Praha

Event date

Apr 7, 2025

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001578479500014