Theory of Reduction of Residual Amplitude Modulation in Mid-Infrared Wavelength Modulation Spectroscopy by Injection Locking of Quantum Cascade Lasers

被引：1
作者：
Yong, Kelvin S. C. [1 ]
Haldar, Manas K. [1 ]
Webb, Jeffrey F. [2 ]
机构：
[1] Swinburne Univ Technol, Fac Engn Comp & Sci, Kuching 93350, Malaysia
[2] Univ Nottingham, Dept Mech Mat & Mfg Engn, Semenyih 43500, Malaysia
来源：
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 2015年 / 21卷 / 06期
关键词：
Injection locking; intensity and frequency modulation; quantum cascade lasers; wavelength modulation spectroscopy; FREQUENCY; PROGRESS;
D O I：
10.1109/JSTQE.2015.2423616
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A simplified rate equation model is used to investigate suppression of residual amplitude modulation in injection-locked quantum cascade lasers with the master laser modulated by its drive current. Quasi-static and dynamic expressions for intensity modulation suppression and frequency modulation reproduction by the slave laser are presented. The suppression peaks at a specific value of the injection ratio for a given detuning and linewidth enhancement factor. The frequency modulation reproduction is less than 100% and decreases rapidly at frequencies higher than 300 MHz. The intensity modulation suppression remains constant during this frequency range. The effects of injection ratio, detuning, coupling efficiency and linewidth enhancement factor are discussed.
引用
收藏
页码：115 / 124
页数：10
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