"Introduction". In: Fiber-Optic Communication Systems
162 CHAPTER 4. OPTICAL RECEIVERS approximated by Mopt≈ [ 4 kBTFn kAqRL(RPin+Id) ] 1 / 3 (4.4.23) forkAin the range 0.01–1. This ...
4.5. RECEIVER SENSITIVITY 163 Figure 4.18: (a) Fluctuating signal generated at the receiver. (b) Gaussian probability densities ...
164 CHAPTER 4. OPTICAL RECEIVERS Equation (4.5.6) shows that the BER depends on thedecision threshold ID.In practice,IDis optimi ...
4.5. RECEIVER SENSITIVITY 165 Figure 4.19: Bit-error rate versus theQparameter. whereP ̄recis the average received power defined ...
166 CHAPTER 4. OPTICAL RECEIVERS Equation (4.5.17) shows howP ̄recdepends on various receiver parameters and how it can be optim ...
4.5. RECEIVER SENSITIVITY 167 the absence of thermal noise,σ 0 ≈0, since shot noise is negligible for the “0” bit if the dark-cu ...
168 CHAPTER 4. OPTICAL RECEIVERS as a measure of receiver sensitivity is quite common. In the quantum limitN ̄p=10. The power ca ...
4.6. SENSITIVITY DEGRADATION 169 Figure 4.20: Power penalty versus the extinction ratiorex. This equation shows thatP ̄recincrea ...
170 CHAPTER 4. OPTICAL RECEIVERS of photocurrent statistics [91]. A simple approach consists of adding a third term to the curre ...
4.6. SENSITIVITY DEGRADATION 171 Figure 4.21: Power penalty versus the intensity noise parameterrI. than the extinction ratio, f ...
172 CHAPTER 4. OPTICAL RECEIVERS variable, the reduction in the sampled value is also random. The SNR is reduced as a result of ...
4.6. SENSITIVITY DEGRADATION 173 Figure 4.22: Power penalty versus the timing jitter parameterBτj. By using Eqs. (4.6.12) and (4 ...
174 CHAPTER 4. OPTICAL RECEIVERS Figure 4.23: Measured receiver sensitivities versus the bit rate forp–i–n(circles) and APD (tri ...
4.7. RECEIVER PERFORMANCE 175 Figure 4.24: BER curves measured for three fiber-link lengths in a 1.55-μm transmission exper- ime ...
176 CHAPTER 4. OPTICAL RECEIVERS propagation. In fact, the increasing curvature of BER curves indicates that the BER of 10 −^9 w ...
PROBLEMS 177 where the parameterβvaries between 0 and 1. Derive an expression for the transfer functionHout(f)given by the Fouri ...
178 CHAPTER 4. OPTICAL RECEIVERS 4.16Derive an expression for the intensity-noise-induced power penalty of ap–i–n receiver by ta ...
REFERENCES 179 [17] K. Kato, A. Kozen, Y. Muramoto, Y. Itaya, N. Nagatsuma, and M. Yaita,IEEE Photon. Technol. Lett. 6 , 719 (19 ...
180 CHAPTER 4. OPTICAL RECEIVERS [44] J. H. Kim, H. T. Griem, R. A. Friedman, E. Y. Chan, and S. Roy,IEEE Photon. Technol. Lett. ...
REFERENCES 181 [71] P. Fay, W. Wohlmuth, C. Caneau, and I. Adesida,Electron. Lett. 31 , 755 (1995). [72] G. G. Mekonnen, W. Schl ...
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