stochastic resonance in silicon photodiode
Open Access
- Author:
- Wang, Yujing
- Area of Honors:
- Engineering Science
- Degree:
- Bachelor of Science
- Document Type:
- Thesis
- Thesis Supervisors:
- Saptarshi Das, Thesis Supervisor
Xiantao Li, Thesis Honors Advisor - Keywords:
- stochastic resonance
Si photodiode - Abstract:
- Weak signal detection method under strong noise background has a very wide range of applications in many disciplines. Conventional weak signal detection methods are mainly based on time domain and frequency domain, for example, self-correlation in time domain and power spectrum density in frequency domain. However, these methods have some limitations, mainly for the high signal-to-noise ratio (SNR) threshold of the input signal. Therefore, there is an urgent demand for a new method to make up for the above deficiencies. In recent years, with the burgeoning development of nonlinear science and stochastic resonance theory, a cutting-edge idea for weak signal detection is created. The uniqueness of stochastic resonance theory depends on its different utilization of noise. The traditional signal detection methods are sparing all effort to suppress noise considering it harmful while stochastic resonance theory is just using the energy of noise signal, which is a new method to turn waste into treasure. This thesis aims at discussing a Silicon (Si) photodetector which is a highly sensitive photodetector with fast response. It can detect the weak photoelectric signal from the long-distance light-emitting diode. Through multiple sets of experiments, we try to find out the optimum standard deviation required in detecting the low intensity optical signal for different wavelength of light.