A comparison of dispersion compensating schemes in 40 Gb/s optical transmission with different modulation formats

2005 ◽  
Author(s):  
Ranjan Gangopadhyay ◽  
A. Vishnu Vardhanan ◽  
Srinivasa Rao Chalamala
Keyword(s):  
Optical Transmission ◽  
Modulation Formats

Performance analysis of modulation formats for 40 Gb/s optical transmission

CONATEL 2011 ◽  
2011 ◽  
Author(s):  
Clenilson Rodrigues da Silveira ◽  
Daniel Moutinho Pataca ◽  
Monica de Lacerda Rocha ◽  
Murilo Araujo Romero
Keyword(s):  
Performance Analysis ◽  
Optical Transmission ◽  
Modulation Formats

Optimal modulation formats for 2 560 km optical transmission with low power penalty

2007 ◽  
Vol 2 (2) ◽  
pp. 209-213
Author(s):  
Yong Chen ◽  
Feng Zhang ◽  
Jihong Cao ◽  
Xi Qin ◽  
Bo Lu ◽  
...  
Keyword(s):  
Low Power ◽  
Optical Transmission ◽  
Power Penalty ◽  
Modulation Formats

scholarly journals Phase Noise Cancellation in Coherent Communication Systems Using a Radio Frequency Pilot Tone

2019 ◽  
Vol 9 (21) ◽  
pp. 4717 ◽  
Author(s):  
Tianhua Xu ◽  
Cenqin Jin ◽  
Shuqing Zhang ◽  
Gunnar Jacobsen ◽  
Sergei Popov ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Phase Noise ◽  
Communication Systems ◽  
Optical Transmission ◽  
Dispersion Compensation ◽  
Optical Fiber Communication ◽  
Noise Cancellation ◽  
Least Mean Square ◽  
Modulation Formats ◽  
The Impact

Long-haul optical fiber communication employing digital signal processing (DSP)-based dispersion compensation can be distorted by the phenomenon of equalization-enhanced phase noise (EEPN), due to the reciprocities between the dispersion compensation unit and the local oscillator (LO) laser phase noise (LPN). The impact of EEPN scales increases with the increase of the fiber dispersion, laser linewidths, symbol rates, signal bandwidths, and the order of modulation formats. In this work, the phase noise cancellation (PNC) employing a radio frequency (RF) pilot tone in coherent optical transmission systems has been investigated. A 28-Gsym/s QPSK optical transmission system with a significant EEPN has been implemented, where the carrier phase recovery (CPR) was realized using the one-tap normalized least-mean-square (NLMS) estimation and the differential phase detection (DPD), respectively. It is shown that the RF pilot tone can entirely eliminate the LPN and efficiently suppress the EEPN when it is applied prior to the CPR.

Sign in / Sign up

Export Citation Format

Share Document