کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7223213 | 1470556 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Particle Swarm Optimization approach to identify optimum electrical pulse characteristics for efficient Gain Switching in Dual Wavelength Quantum Cascade Lasers
ترجمه فارسی عنوان
رویکرد بهینه سازی ذرات برای شناسایی ویژگی های ضربان الکتریکی مطلوب برای جابجایی کارآیی در لیزرهای کاسپاد کوانتومی با طول موج دوگانه
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
چکیده انگلیسی
Numerical simulation of Gain Switching in Dual Wavelength QCLs (DW-QCLs) for short pulse generation in the mid-Infrared region is reported. A four-level rate equation model is used to investigate the QCL which consists of 48 periods of injector and active regions, emitting at 10.5â¯Î¼m and 8.9â¯Î¼m. The device is simulated for various inputs such as square, haversine and tangential hyperbolic electrical pulses. The optimum parameters of electrical pulse pertaining to generation of short pulses with maximum power and minimum pulse width for single wavelength and simultaneously at both wavelengths are determined using Particle Swarm Optimization (PSO) technique. The physical nature of drive current and its time period dictates the duration and peak power in both the wavelengths. It is found that square pulse of amplitude 11.12â¯mA and 0.1â¯ns produces short optical pulses of width 15.89â¯ps with peak power of 2.2â¯mW at 10.5â¯Î¼m. Similarly, short optical pulses with peak power 1.8â¯mW and width 15.92â¯ps are generated by square pulse of amplitude 13.12â¯mA at 8.9â¯Î¼m. It is also observed that tangential hyperbolic pulse of amplitude 10.79â¯mA and 8.47â¯mA produces short optical pulses with equal power and equal pulse width respectively in both the wavelengths at 0.1â¯ns.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - Volume 171, October 2018, Pages 786-797
Journal: Optik - Volume 171, October 2018, Pages 786-797
نویسندگان
P. Ashok, M. Ganesh Madhan,