Broadband spectral tuning and multi-molecular detection in a BaGa4Se7 optical parametric amplifier

被引：0

作者：

Fu, Zhizhuo ^{[1
]}

Hu, Bo ^{[1
]}

He, Linzhen ^{[1
]}

Yang, Xuemei ^{[1
]}

Li, Chunxiao ^{[2
]}

Yao, Jiyong ^{[2
]}

Wu, Han ^{[1
]}

Liang, Houkun ^{[1
]}

机构：

[1] Sichuan Univ, Coll Elect & Informat Engn, Chengdu 610064, Sichuan, Peoples R China

[2] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing Ctr Crystal Res & Dev, Key Lab Funct Crystals & Laser Technol, Beijing 100190, Peoples R China

来源：

OPTICS LETTERS | 2024年 / 49卷 / 23期

基金：

中国国家自然科学基金;

关键词：

MU-M; GENERATION; EFFICIENT;

D O I：

10.1364/OL.541336

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Broadband spectral tuning of long-wavelength infrared (LWIR) femtosecond lasers without rotating nonlinear crystals has special usefulness in applications of nonlinear integrated photonics and microscopic ultrafast dynamics studies with stringent requirements on beam pointing. Here, we demonstrate, for the first time to the best of our knowledge, a temperature-tuning LWIR femtosecond optical parametric amplifier (OPA), based on a BaGa4Se7 (BGSe) crystal. Broadband spectral tunability from 8.4 to 17.1 mu m over a crystal temperature range of 20-140 degrees C at three fixed phase- matching (PM) angles is achieved with mini-watts output power. As a proof of concept, multiple trace gas detections are demonstrated on sulfur hexafluoride, ethane, and acetylene through only temperature variation. Our results validate the feasibility of achieving an ultra-broadband LWIR spectral tuning through temperature variation in a BGSe OPA, which is beneficial for unique applications such as on-chip spectroscopy and microscopic pump-and-probe experiments. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

引用

页码：6757 / 6760

页数：4