High-Power, Narrow-Linewidth Distributed-Feedback Quantum-Cascade Laser for Molecular Spectroscopy

被引：3

作者：

Bertrand, Mathieu ^{[1
]}

Shlykov, Aleksandr ^{[2
]}

Shahmohamadi, Mehran ^{[1
]}

Beck, Mattias ^{[1
]}

Willitsch, Stefan ^{[2
]}

Faist, Jerome ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, Switzerland

[2] Univ Basel, Dept Chem, CH-4056 Basel, Switzerland

来源：

PHOTONICS | 2022年 / 9卷 / 08期

基金：

瑞士国家科学基金会;

关键词：

QCL; linewidth; spectroscopy; FREQUENCY-NOISE; INTRINSIC LINEWIDTH; TRANSITIONS; STABILITY; AMPLIFIER; COMB;

D O I：

10.3390/photonics9080589

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Quantum cascade lasers are versatile light sources in the mid-infrared range for molecular spectroscopy which find a wide range of applications from high-resolution studies to sensing. While devices with either high power or narrow spectral linewidth have previously been reported, there is still a lack of sources combining both of these characteristics which are particularly important for precision measurements of weak spectroscopic transitions. In this article, we describe and characterize a novel master-oscillator power-amplifier distributed-feedback quantum cascade laser designed to fill this gap. At an output power of 300 mW, the device features a free-running linewidth of 1.3 MHz, measured with a frequency discriminator technique, at an emission wavenumber of 2185 cm(-1). This linewidth is sufficiently narrow to enable a further reduction by a tight lock to a high-Q oscillator.

引用

页数：9

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