Laser Diode Modulation Under Large Signal Conditions
محل انتشار: بیست و یکمین کنفرانس مهندسی برق ایران
سال انتشار: 1392
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 734
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شناسه ملی سند علمی:
ICEE21_607
تاریخ نمایه سازی: 27 مرداد 1392
چکیده مقاله:
Large signal behavior of the Laser Diode is analyzed with the aim of finding a qualitative relationship between modulation amplitude and the change in the shape of its transferfunction. It is found that, at quasi-static conditions, increasing the amplitude of the modulating signal smoothes out the originalpiecewise-linear transfer function of the diode. It further shifts the – now smoothed – knee point to lower DC currents. As the frequency increases, however, these effects become less and lesspronounced. In addition, the transfer function becomes rather wavy due to the failure of current density to reach the saturationlevel necessary for adequate stimulated emission. At even higher frequencies, carrier density never accumulates in response toshort pulses of current. In these conditions the transfer function reverts back to its original shape.
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نویسندگان
Arman Ahmadian
Sharif University of Technology