Title :
Sensitivity penalty for AMI-coded CPFSK in heterodyne delay demodulation receiver
Author :
Mazumder, S.P. ; Gangopadhyay, R. ; Forestieri, E. ; Prati, G.
Author_Institution :
Dept. of Electr. & Electron. Eng., BUET, Dacca, Bangladesh
Abstract :
Bit-error rate performance and sensitivity penalty for 2.5 Gb/s AMI-coded optical CPFSK in a delay demodulation receiver are obtained. It has been found that an optimum modulation index of 0.9 yields a theoretical system penalty of 2 dB at a bit-error rate of 10/sup -9/ using a DFB laser with nonflat FM response and normalized laser linewidth /spl Delta//spl nu/T=4/spl times/10/sup -4/.<>
Keywords :
demodulation; distributed feedback lasers; electro-optical modulation; encoding; errors; frequency shift keying; optical receivers; optimisation; sensitivity; spectral line breadth; 2.5 Gbit/s; AMI-coded CPFSK; AMI-coded optical CPFSK; DFB laser; alternate mark inversion encoding; bit-error rate performance; delay demodulation receiver; heterodyne delay demodulation receiver; nonflat FM response; normalized laser linewidth; optimum modulation index; sensitivity penalty; theoretical system penalty; Bit error rate; Delay; Demodulation; Frequency modulation; Laser noise; Nonlinear filters; Optical filters; Optical mixing; Optical receivers; Phase noise;
Journal_Title :
Photonics Technology Letters, IEEE
