Variation of the emission frequency of a terahertz quantum cascade laser

被引：0
|
作者：
A. A. Lastovkin
A. V. Ikonnikov
A. V. Antonov
V. Ya. Aleshkin
V. I. Gavrilenko
Yu. G. Sadof’ev
机构：
[1] Russian Academy of Sciences,Institute for Physics of Microstructures
[2] Lobachevsky State University of Nizhny Novgorod,Lebedev Physical Institute
[3] Russian Academy of Sciences,undefined
来源：
Technical Physics Letters | 2016年 / 42卷
关键词：
Technical Physic Letter; Radiation Pulse; Quantum Cascade Laser; Laser Radiation Pulse; Laser Structure;
D O I：
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中图分类号：
学科分类号：
摘要：
The variation of the emission frequency of a quantum cascade laser of the 3.2 THz range within a single radiation pulse was studied using high-resolution Fourier spectroscopy. A significant (108 MHz) increase in frequency in the first 4 μs of a pulse was found. This increase is attributed to a change in the electron part of permittivity of the laser active region coinciding with a rise in the emission intensity. The frequency dropped by 81 MHz in the following 40 μs of a radiation pulse due to a change in the lattice part of permittivity occurring as the laser active region was heated during a radiation pulse.
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页码：230 / 233
页数：3
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