Inline-delay Fourier transform imaging spectrometer for mid-IR ultrashort pulses

被引：0
|
作者：
Purschke, David N. [1 ,2 ]
Korobenko, Aleksey [1 ,2 ]
Staudte, Andre [1 ,2 ]
Naumov, Andrei Yu [1 ,2 ]
Villeneuve, David M. [1 ,2 ]
Vampa, Giulio [1 ,2 ]
机构：
[1] Natl Res Council Canada, Joint Attosecond Sci Lab, Ottawa, ON K1A 0R6, Canada
[2] Univ Ottawa, Ottawa, ON K1A 0R6, Canada
来源：
OPTICS EXPRESS | 2024年 / 32卷 / 21期
基金：
加拿大自然科学与工程研究理事会;
关键词：
HIGH-HARMONIC GENERATION; SPATIAL CHIRP;
D O I：
10.1364/OE.537991
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An inline-delay Fourier transform imaging spectrometer (iFTIS) is used to measure spatiospectral coupling in a mid-infrared (mid-IR) optical parametric amplifier (OPA). The method employs a compact inline delay line using a birefringent wedge pair and a microbolometer array as an imaging sensor, providing continuous spectral coverage from similar to 0.4 to 4.5 mu m in a single device. We find a spatial chirp that depends systematically on the OPA wavelength setting in the 3-4 mu m range and also identify spatiospectral couplings beyond spatial chirp, highlighting the importance of advanced metrological techniques for this spectral region. Furthermore, we investigate the effect of depletion on the 2 mu m pump beam and observe a complex spatiospectral reshaping. Our work opens the door to new applications of iFTIS to mid-IR laser science. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码：37635 / 37644
页数：10
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