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Optimum and suboptimum memoryless nonlinearities for the detection of ultrashort light pulses in gaussian noise [electronic resource]

Farhang, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/TCOMM.2009.12.080110
  3. Abstract:
  4. Detection of ultrashort light pulses with conventional bandlimited photodetectors can lead to substantial performance degradation in digital lightwave communication systems. All-optical nonlinear processing of the received field prior to the optical to electrical conversion can greatly overcome this problem. In this letter, through a decision-theoretic framework and using a basic invariance property of the photodetector, we obtain the optimal zero-memory nonlinear element and evaluate its performance. Possible suboptimum nonlinearities are also investigated and their performance is examined. The results in this letter strongly justify the intuitive use of power-law devices, such as those implemented via two photon absorption (TPA) or second harmonic generation (SHG), in the detection of ultrashort light pulses and show how by using them almost optimal performance can be achieved
  5. Keywords:
  6. Nonlinear elements ; All-optical ; Decision-theoretic ; Gaussian noise ; Intuitive use ; Lightwave communication system ; Memoryless nonlinearities ; Non-Linearity ; Bandlimited ; Optical-to-electrical conversion ; Optimal performance ; Performance degradation ; Power-law ; Second harmonic generation ; Two photon absorption ; Ultra-short light pulse
  7. Source: IEEE Transactions on Communications ; 2009 Volume 57, Issue 12, December 2009, Article number 5351650, Pages 3561-3565
  8. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5351650