Showing 3 results for Mabhouti
Akbar Jafari, Khosro Mabhouti, Maryam Heydari Heydarabad,
Volume 8, Issue 1 (International Journal of Optics and Photonics (IJOP) Vol 8, No 1, Winter-Spring 2014)
Abstract
In this paper, considering optical feedback as an optical injection, and taking in to account round-trip time role in the external cavity, a standard small signal analysis is applied on laser rate equations. By considering the relaxation oscillation (f2) and external cavity frequencies (f) ratio for semiconductor laser, field amplitude response gain, optical phase and carrier number for long external cavities (LEC) and short external cavities (SEC) are obtained. Laser output intensity and resonance peak dynamics have been shown by bifurcation diagrams. Furthermore, the effects of some control parameters, such as enhancement factor, pumping current and feedback strength, on response gain have been discussed in short and long external cavities. As a result, in optical injection, for SEC, compared to LEC, more varied dynamics are observed. Also, higher values of the response gain peak in SEC, in comparison with LEC, make SEC to be affected more by the injected beam. SEC provides greater bandwidth, and also better performance in the range of compared to LEC.
Erfan Abbaszadeh Jabal Kandi, Khosro Mabhouti, Rahim Naderali, Neda Samadzadeh,
Volume 17, Issue 1 (Winter-Spring 2023)
Abstract
In this article, the conditions of pulse production in two mutually coupled lasers are studied. Based on the obtained characteristic equation and its roots, the dynamical behavior of the system and the threshold of the instability are analyzed. For the stable operation of the system and with the use of the time series curves, it is possible to study the dynamical behavior and the stability ranges of the laser in the presence of the saturable absorber and the gain environment. This paper aims to achieve from quasi-periodic behavior in a solitary laser to the generation of a pulse train from two mutually coupled lasers in the presence of saturable absorbers. Also, the stability range for a solitary laser and then for two coupled lasers in the presence of saturable absorbers have been studied.
Fahime Bakhsheshi, Khosro Mabhouti, Rahim Naderali, Ali Mahmoodlou,
Volume 18, Issue 1 (10-2024)
Abstract
Quantum cascade lasers (QCLs) are sources in mid-infrared and terahertz (THz) regions used in the sensing domain and quality control. This paper investigates QCLs subject to filtered phase-conjugate feedback (FPCF). Instabilities can be detected using the graphical method of pole analysis and the particle swarm optimization algorithm, which allows us to identify and characterize the limitation and critical relations between the laser operating parameters. There is good agreement between the two methods to stability boundaries. The effects of FPCF in comparison with conventional optical feedback (COF), phase-conjugate feedback (PCF), and tilted optical feedback (TOF) show that the penetration time factor has a significant and greater influence on the stability of QCL subject to FPCF. These results are in perfect agreement with previous experimental and analytical studies.
