This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility:

fact-checked

peer-reviewed publication

trusted source

proofread

Researchers develop high-efficiency mid- and long-wave optical parametric oscillator pump source

Researchers develop high-efficiency mid- and long-wave optical parametric oscillator pump source
Experimental setup of the Ho:YAG laser pumped by Tm:YLF laser. Credit: Scientific Reports (2023). DOI: 10.1038/s41598-023-27970-0

Widely tunable mid- and long-wave infrared (8–12 μm) lasers are located in the atmospheric window range and the human eye safety range. They are widely applied in the field of Lidar.

A research team from the Aerospace Information Research Institute (AIR) of the Chinese Academy of Sciences (CAS) has developed a high-efficiency mid- and long-wave optical parametric oscillator pump source: the Ho:YAG , which achieves high-efficiency 2.1 μm laser output by scanning and optimizing the pump laser .

The study was published in Scientific Reports on Jan. 18.

A tunable Tm:YLF laser is the pump source of the Ho:YAG laser. According to the temperature tuning characteristics of volume Bragg grating (VBG), the wavelength of Tm:YLF laser's continuous tunability ranges from 1906.04 to 1908.83 nm, corresponding to a linewidth of less than 0.41 nm.

By scanning and optimizing the wavelength of the pump light, the Ho:YAG laser output with a light-to-light conversion efficiency of 59.12% and a slope efficiency of 68.26% was achieved under the center wavelength of the pump source of 1907.36 nm.

They used the Ho:YAG laser as the pump source of ZnGeP2 optical parametric oscillator (ZGP-OPO) and obtained a high-efficiency tunable long-wave infrared laser under type I phase matching, with a tuning range of 8.02–9.15 μm.

More information: Juntao Tian et al, Ho:YAG laser at 2097 nm pumped by a narrow linewidth tunable 1.91 μm laser, Scientific Reports (2023). DOI: 10.1038/s41598-023-27970-0

Journal information: Scientific Reports

Citation: Researchers develop high-efficiency mid- and long-wave optical parametric oscillator pump source (2023, February 14) retrieved 14 June 2024 from https://phys.org/news/2023-02-high-efficiency-mid-long-wave-optical-parametric.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

High efficiency and low noise amplification of ultrashort pulses by quasi-parametric amplification

2 shares

Feedback to editors