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16.711 Lecture 8 Optical Fiber Amplifier – noise and BER

16.711 Lecture 8 Optical Fiber Amplifier – noise and BER. Last lecture. Introduction to Fiber Optical Amplifier – types and applications Erbium-doped fiber amplifier (EDFA) External pumping and amplifier gain Power-conversion efficiency and gain profile.

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16.711 Lecture 8 Optical Fiber Amplifier – noise and BER

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  1. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Last lecture • Introduction to Fiber Optical Amplifier – types and applications • Erbium-doped fiber amplifier (EDFA) • External pumping and amplifier gain • Power-conversion efficiency and gain profile

  2. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Today • Amplifier Noise • OSNR and BER • System Applications

  3. is the distribution function. is number of optical modes at v. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Einstein’s A and B coefficients

  4. is the spontaneous factor. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Noise Power

  5. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Amplified spontaneous noise Noise Power spectral density: Total ASE power: Total power:

  6. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Receiver noise Total photo-detector current: R is the resistance of the detector load resistor. Total ASE power:

  7. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Receiver noise Total photo-detector current:

  8. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Gain and Noise Figure Total photo-detector current:

  9. External control Electronics Detector 980 pump EDF Output Input 5%Tap WDM 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Amplifier System Noise figure (NF)

  10. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER BER calculation: Quantum limit detection, Poisson’s equation: Gaussian Noise Statistics :

  11. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER BER calculation: • OSNR =10dB for 2.5GBit/s • OSNR =15dB for 10GBit/s

  12. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER PreAmp:

  13. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER In-line Amp:

  14. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Amplifier Chain:

  15. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Amplifier Chain:

  16. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Amplifier Chain:

  17. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Amplifier Chain:

  18. 16.711 Lecture 8 Optical Fiber Amplifier – noise and BER Amplifier Chain:

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