A Study of Residual Amplitude Modulation Suppression in Injection Locked Quantum Cascade Lasers Based on a Simplified Rate Equation Model

In this paper, a theoretical investigation of negative optoelectronic feedback study in Nano quantum cascade lasers is presented. The present rate equation model has been modified to include the nano laser factors such as the Purcell factor and the spontaneous emission factor. The results indicate that the present rate equation model can be using to study the effect of Purcell factor and the spontaneous emission factor on the negative optoelectronic feedback in Nano quantum cascade lasers. It is found that the increase in Purcell factor value leads to increase in photon number and decrease the carrier number in all quantum states. Also, the dynamic of photon number (S) tends to stable at constant value with the increase of Purcell effect i.e. there is small variation in photon number and carrier number( , , ). The decreases in enhanced spontaneous emission factor value leads to increases in carrier number and decreases the photon number and we note small variation in these values.

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

IEEE Journal of Selected Topics in Quantum Electronics ◽

10.1109/jstqe.2015.2423616 ◽

2015 ◽

Vol 21 (6) ◽

pp. 115-124 ◽

Cited By ~ 1

Author(s):

Kelvin S. C. Yong ◽

Manas K. Haldar ◽

Jeffrey F. Webb

Keyword(s):

Quantum Cascade Lasers ◽

Wavelength Modulation Spectroscopy ◽

Injection Locking ◽

Wavelength Modulation ◽

Mid Infrared ◽

Modulation Spectroscopy ◽

Infrared Wavelength ◽

Quantum Cascade ◽

Residual Amplitude Modulation ◽

Cascade Lasers

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GaAs/AlGaAs Quantum Cascade Lasers Based on Double Resonant Electron – LO Phonon Transitions

Materials Science Forum ◽

10.4028/www.scientific.net/msf.494.25 ◽

2005 ◽

Vol 494 ◽

pp. 25-30 ◽

Cited By ~ 2

Author(s):

A. Mirčetić ◽

D. Indjin ◽

V. Milanović ◽

P. Harrison ◽

Z. Ikonić ◽

...

Keyword(s):

Optical Phonon ◽

Quantum Cascade Lasers ◽

Longitudinal Optical ◽

Equation Model ◽

Longitudinal Optical Phonon ◽

Quantum Cascade ◽

Resonant Electron ◽

Efficient Extraction ◽

Output Characteristics ◽

Cascade Lasers

In this paper a procedure for the global optimization of mid-infrared GaAs/AlGaAs quantum cascade lasers that relies on the method of simulated annealing is presented. We propose a double longitudinal optical phonon resonance design obtained via a ladder of three states, with subsequent pairs separated by optical phonon energy. Addition of an extra level decreases the lower laser level population by enabling an efficient extraction into the injector region. The output characteristics of the optimized structures are calculated using the full self–consistent rate equation model, which includes all of the relevant scattering mechanisms. We also presented the experimentally measured output characteristics of an initial device, which are in agreement with the numerically calculated values, confirming the good design capabilities of the applied procedure.

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