IIIT Hyderabad Publications |
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DesignandAnalysisofSwitchesEmployingSemiconductorRingLaser.Author: Ashish Bhatt Date: 2020-02-22 Report no: IIIT/TH/2020/12 Advisor:Azeemuddin Syed AbstractIn the recent times there has been a rapid growth in telecommunication industry. This leads to the demands of larger bandwidth and faster signal processing. However due to the limitations of electronic devices it is becoming increasingly difficult to cater to this ever increasing demand of bandwidth. It was later discovered that signal processing in optical devices is faster as compared to it’s electronic counterparts. This advantage of optical devices over electronic ones has attracted large number of researchers to study, understand and develop various all-optical devices. It is where the semiconductor ring laser provides a viable alternative as a key element to various faster optical devices. In this thesis we first introduce all-optical switching devices such as schmitt trigger and delta sigma modulator which are crucial part of signal processing. The effects of designer oriented parameters on various specifications like switching time, sampling speed and input amplitude are also studied and analyzed later on. The only parameters which can be readily varied externally are considered because those are the parameters a designer can tune. Such an analysis is essential for optimization of BDSM’S parameters and getting the desired sampling rate. In the last chapter an all-optical proteretic device is introduced which works in just opposite fash- ion to hysteretic devices and can enable us to sample signals at even higher speeds of modulation as compared to conventional scmhitt trigger. The reason for proteretic switch being faster is that it avoids delayed transition as found in conventional hysteretic switch. Lastly a novel method of modulation in the form of all-optical hysteretic proteretic switch is introduced. Rate equations of semiconductor ring laser is mathematically modeled in MATLAB. Full thesis: pdf Centre for VLSI and Embeded Systems Technology |
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