scholarly journals Noise statistics in optically preamplified differential phase-shift keying receivers with Mach–Zehnder interferometer demodulation

2004 ◽  
Vol 29 (4) ◽  
pp. 337 ◽  
Author(s):  
Xiupu Zhang ◽  
Guodong Zhang ◽  
Chongjin Xie ◽  
Lei Wang
Keyword(s):  
Phase Shift ◽  
Zehnder Interferometer ◽  
Phase Shift Keying ◽  
Differential Phase Shift ◽  
Differential Phase ◽  
Differential Phase Shift Keying ◽  
Shift Keying ◽  
Noise Statistics ◽  
Mach Zehnder Interferometer

Optical DPSK Temperature-insensitive Demodulator

Frequenz ◽  
2012 ◽  
Vol 66 (7-8) ◽  
Author(s):  
Nawfel Azami ◽  
Anouar Rahmouni
Keyword(s):  
Phase Shift ◽  
Zehnder Interferometer ◽  
Thermal Drift ◽  
Phase Shift Keying ◽  
Differential Phase Shift ◽  
Differential Phase ◽  
Differential Phase Shift Keying ◽  
Innovative Method ◽  
Shift Keying ◽  
Output Amplifier

AbstractAn innovative method to achieve temperature-insensitive Optical Differential Phase Shift Keying demodulation is presented The demodulation is realized with a Mach–Zehnder-Interferometer-based-DPSK with direct intensity detection at the output using photodiodes followed by a trans-impedance amplifier. The output amplifier voltages thermal-drift are automatically compensated using a differential

Design and Performance Analysis of 2D OCDMA System with Polarization States

2016 ◽  
Vol 37 (4) ◽  
Author(s):  
Manisha Bharti ◽  
Ajay K. Sharma ◽  
Manoj Kumar
Keyword(s):  
Phase Shift ◽  
Polarization State ◽  
Phase Shift Keying ◽  
Modulation Formats ◽  
Differential Phase Shift ◽  
Differential Phase ◽  
Differential Phase Shift Keying ◽  
Shift Keying ◽  
Polarization States ◽  
Code Division Multiple

AbstractThis paper focuses on increasing the number of subscribers in optical code-division multiple access (OCDMA) system by using one of the features of light signal that it can be propagated in two polarization states. The performance of two-dimensional (2D) OCDMA system based on wavelength-time coding scheme by adding polarization state is investigated at varying data rates from 1 GHz to 6 GHz and for various modulation formats. It is reported that with increase in data rate of system, the performance of the system deteriorates due to polarization mode dispersion. Non-return to-zero (RZ), return to-zero (RZ), carrier suppressed return-to-zero (CSRZ) and differential phase shift keying (DPSK) modulation formats are simulated for a single user system with polarization. Investigations reveal that differential phase shift keying (DPSK) modulation format suits best to the proposed system and exhibit the potential to improve the flexibility of system for more number of users. The investigations are reported in terms of Q-factor, BER, received optical power (ROP) and eye diagrams.

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