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
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.
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页数:9
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