vahed servati - Academia.edu (original) (raw)

Papers by vahed servati

International Journal of Applied Electronics in Physics & Robotics, 2013

In this paper the dynamic effects on GaAs/AlGaAs Characteristics of quantum cascade lasers (QCL) ... more In this paper the dynamic effects on GaAs/AlGaAs Characteristics of quantum cascade lasers (QCL) in the mid-infrared range of λ=9μm is investigated by solving the numerical equations ODE. The spontaneous emission rate changes, its effects on the number of carriers, the number of photons, and the output power are studied. Afterward, the output power changes, by increasing the number of stages in the quantum cascade laser, have been studied.

In this paper the dynamic effects on GaAs/AlGaAs Characteristics of quantum cascade lasers (QCL) ... more In this paper the dynamic effects on GaAs/AlGaAs Characteristics of quantum cascade lasers (QCL) in the mid-infrared range of λ=9μm is investigated by solving the numerical equations ODE. The spontaneous emission rate changes, its effects on the number of carriers, the number of photons, and the output power are studied. Afterward, the output power changes, by increasing the number of stages in the quantum cascade laser, have been studied.

Abstract. The quantum cascade lasers are such unipolarity lasers that have the emissivity from mi... more Abstract. The quantum cascade lasers are such unipolarity lasers that have the emissivity from mid infrared to far infrared range. In this paper the dynamic effects of quantum cascade lasers (QCL) GaAs/AlGaAs characteristics in the mid–infrared range of λ=9 µm is investigated by solving the numerical equations. Calculating of the spontaneous emission rate changes, its effects on the number of carriers, the number of photons, and the output power are the objectives of the presented study. Finally, the output power changes, by increasing the number of stages in the quantum cascade laser, have been studied. The obtained results showed that, the increase of spontaneous emission rate parameter causes delay in the laser output. In addition, there is a direct relationship between the number of stages and the output power.

International Journal of Applied Electronics in Physics & Robotics, 2013

The quantum cascade lasers are such unipolarity lasers that have the emissivity from mid infrared... more The quantum cascade lasers are such unipolarity lasers that have the emissivity from mid infrared to far infrared range. In this paper the dynamic effects of quantum cascade lasers (QCL) GaAs/AlGaAs characteristics in the mid-infrared range of λ=9 µm is investigated by solving the numerical equations. Calculating of the spontaneous emission rate changes, its effects on the number of carriers, the number of photons, and the output power are the objectives of the presented study. Finally, the output power changes, by increasing the number of stages in the quantum cascade laser, have been studied. The obtained results showed that, the increase of spontaneous emission rate parameter causes delay in the laser output. In addition, there is a direct relationship between the number of stages and the output power.

International Journal of Applied Electronics in Physics & Robotics, 2013

In this paper the dynamic effects on GaAs/AlGaAs Characteristics of quantum cascade lasers (QCL) ... more In this paper the dynamic effects on GaAs/AlGaAs Characteristics of quantum cascade lasers (QCL) in the mid-infrared range of λ=9μm is investigated by solving the numerical equations ODE. The spontaneous emission rate changes, its effects on the number of carriers, the number of photons, and the output power are studied. Afterward, the output power changes, by increasing the number of stages in the quantum cascade laser, have been studied.

In this paper the dynamic effects on GaAs/AlGaAs Characteristics of quantum cascade lasers (QCL) ... more In this paper the dynamic effects on GaAs/AlGaAs Characteristics of quantum cascade lasers (QCL) in the mid-infrared range of λ=9μm is investigated by solving the numerical equations ODE. The spontaneous emission rate changes, its effects on the number of carriers, the number of photons, and the output power are studied. Afterward, the output power changes, by increasing the number of stages in the quantum cascade laser, have been studied.

Abstract. The quantum cascade lasers are such unipolarity lasers that have the emissivity from mi... more Abstract. The quantum cascade lasers are such unipolarity lasers that have the emissivity from mid infrared to far infrared range. In this paper the dynamic effects of quantum cascade lasers (QCL) GaAs/AlGaAs characteristics in the mid–infrared range of λ=9 µm is investigated by solving the numerical equations. Calculating of the spontaneous emission rate changes, its effects on the number of carriers, the number of photons, and the output power are the objectives of the presented study. Finally, the output power changes, by increasing the number of stages in the quantum cascade laser, have been studied. The obtained results showed that, the increase of spontaneous emission rate parameter causes delay in the laser output. In addition, there is a direct relationship between the number of stages and the output power.

International Journal of Applied Electronics in Physics & Robotics, 2013

The quantum cascade lasers are such unipolarity lasers that have the emissivity from mid infrared... more The quantum cascade lasers are such unipolarity lasers that have the emissivity from mid infrared to far infrared range. In this paper the dynamic effects of quantum cascade lasers (QCL) GaAs/AlGaAs characteristics in the mid-infrared range of λ=9 µm is investigated by solving the numerical equations. Calculating of the spontaneous emission rate changes, its effects on the number of carriers, the number of photons, and the output power are the objectives of the presented study. Finally, the output power changes, by increasing the number of stages in the quantum cascade laser, have been studied. The obtained results showed that, the increase of spontaneous emission rate parameter causes delay in the laser output. In addition, there is a direct relationship between the number of stages and the output power.