Phase shift keying (PSK & DPSK) techniques for long-haul wavelength division multiplexing systems over standard single-mode fiber

2002 ◽  
Author(s):  
Jochen Leibrich ◽  
Christoph Wree ◽  
Werner Rosenkranz
Keyword(s):  
Phase Shift ◽  
Wavelength Division Multiplexing ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Phase Shift Keying ◽  
Wavelength Division ◽  
Shift Keying ◽  
Multiplexing Systems

scholarly journals On the 100 Gbps DWDM with Optical Carrier Suppression Modulation

2021 ◽  
Vol 11 (1) ◽  
pp. 218-223
Author(s):  
Tomáš Huszaník ◽  
Ján Turán ◽  
Ľuboš Ovseník
Keyword(s):  
Wavelength Division Multiplexing ◽  
High Efficiency ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Phase Shift Keying ◽  
Optical Carrier ◽  
Wavelength Division ◽  
Link Performance ◽  
Shift Keying ◽  
Reflected Power

Abstract This paper investigates the transmission performance of 16-channel DWDM (Dense Wavelength Division Multiplexing) system with two complex Optical Differential Quadrature Phase Shift Keying modulator configurations using 2 LiNb MZM (Mach-Zehnder Modulator) and 3 LiNb MZM. The link performance is evaluated for 100 Gbps data rate per channel in a total 750 km single mode fiber link. The perfomance is analyzed in terms of forward power, reflected power and bit-error rate of the received signal. From the simulation results we prove, that the link performance can be improved by adopting the high efficiency optical modulation.

Transmission Performance of 112 Gb/s POLMUX QPSK Signal in OOK/DPSK WDM System

2020 ◽  
Vol 41 (2) ◽  
pp. 171-176
Author(s):  
Harmanpreet Kaur Sandhu ◽  
R.S Kaler ◽  
Gurpreet Kaur ◽  
Rajneesh Randhawa
Keyword(s):  
Phase Shift ◽  
Wavelength Division Multiplexing ◽  
Phase Modulation ◽  
Optical Signal ◽  
Phase Shift Keying ◽  
Error Vector Magnitude ◽  
Differential Phase Shift ◽  
Wavelength Division ◽  
Shift Keying ◽  
The Impact

AbstractIn this article, the impact of cross-phase modulation (XPM) and cross-polarization modulation (XpolM) on transmission of 112 Gb/s polarization multiplexed quadrature phase shift keying (POLMUX QPSK) signal in a wavelength division multiplexing (WDM) system has been investigated. This WDM system comprises of on-off keying (OOK) or differential phase shift keying (DPSK) channels. It is observed that the effects of XPM and XpolM are greatly reduced in a hybrid system of co-propagating OOK and DPSK channels. This is due to the dominance of phase modulation of DPSK signals rather than the intensity modulated OOK signals. The error vector magnitude (EVM) of the received optical signal is evaluated for the increase in number of neighbouring OOK and DPSK channels respectively within a bandwidth of 350 GHz. Also, the effect of increase in bit rate for two neighbouring OOK and DPSK channels has been observed individually on the 112 Gb/s POLMUX QPSK signal. It is concluded that DPSK signals display an improvement of −9.44 dB in EVM over OOK signals when there are eight neighbouring channels in the transmission system.

scholarly journals Peta-bit-per-second optical communications system using a standard cladding diameter 15-mode fiber

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Georg Rademacher ◽  
Benjamin J. Puttnam ◽  
Ruben S. Luís ◽  
Tobias A. Eriksson ◽  
Nicolas K. Fontaine ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Capacity Limits ◽  
Wavelength Division ◽  
Core Networks ◽  
Space Division Multiplexing ◽  
Space Division ◽  
Data Rates ◽  
Multi Mode

AbstractData rates in optical fiber networks have increased exponentially over the past decades and core-networks are expected to operate in the peta-bit-per-second regime by 2030. As current single-mode fiber-based transmission systems are reaching their capacity limits, space-division multiplexing has been investigated as a means to increase the per-fiber capacity. Of all space-division multiplexing fibers proposed to date, multi-mode fibers have the highest spatial channel density, as signals traveling in orthogonal fiber modes share the same fiber-core. By combining a high mode-count multi-mode fiber with wideband wavelength-division multiplexing, we report a peta-bit-per-second class transmission demonstration in multi-mode fibers. This was enabled by combining three key technologies: a wideband optical comb-based transmitter to generate highly spectral efficient 64-quadrature-amplitude modulated signals between 1528 nm and 1610 nm wavelength, a broadband mode-multiplexer, based on multi-plane light conversion, and a 15-mode multi-mode fiber with optimized transmission characteristics for wideband operation.

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