Tehnički vjesnik, Vol. 23 No. 3, 2016.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20140804100430
Calculation of short optical pulses by using two sections passive Q-switching diode laser
Fariborz Parandin
; (1) Department of Electrical Engineering, Eslam Abad Gharb Branch, Islamic Azad University, Eslam Abad Gharb, Kermanshah, Iran; (2) Department of Electronic Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran
Mohammad Mehdi Karkhanehchi
; Department of Electronic Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran, P. O. Box: 67149-67346
Reza Hemmati
; Department of Electrical Engineering, Kermanshah University of Technology, Kermanshah, Iran, P. O. Box: 63766-67178
Naser Mahtabi
; Department of Electrical Engineering, Eslam Abad Gharb Branch, Islamic Azad University, Eslam Abad Gharb, Kermanshah, Iran
Sažetak
In order to attain the optical pulses with high frequency, the pulse-width must be very short. In practical systems, passive Q-switching is mainly regarded as one of the main methods to generate the short optical pulses. In passive Q-switching method, the optical pulses are generated by using laser parameters and therefore, the external electrical or optical modulators are not required to generate the optical pulses. This issue is regarded as the advantage of the passive Q-switching method compared to the other methods. In this paper, a model for two-section passive Q-switching diode laser is proposed. In the suggested method, the changing rates of the carriers are obtained in two regions by solving the equations. As well, by applying this mechanism, the pulse generation is described. Furthermore, the pulse width is achieved and it is demonstrated that the pulse width depends on the physical parameters of the laser.
Ključne riječi
carriers changing rate; diode laser; mathematical modelling; short optical pulses; two-section passive Q-switching
Hrčak ID:
160146
URI
Datum izdavanja:
19.6.2016.
Posjeta: 1.630 *