scholarly journals Polarization independent optical injection locking for carrier recovery in optical communication systems

2017 ◽  
Vol 25 (18) ◽  
pp. 21216 ◽  
Author(s):  
Jokhakar Jignesh ◽  
Bill Corcoran ◽  
Jochen Schröder ◽  
Arthur Lowery
Keyword(s):  
Optical Communication ◽  
Communication Systems ◽  
Injection Locking ◽  
Optical Injection ◽  
Carrier Recovery ◽  
Optical Injection Locking ◽  
Optical Communication Systems ◽  
Polarization Independent

scholarly journals Homodyne OFDM with Optical Injection Locking for Carrier Recovery

2015 ◽  
Vol 33 (1) ◽  
pp. 34-41 ◽  
Author(s):  
Zhixin Liu ◽  
Joon-Young Kim ◽  
David S. Wu ◽  
David J. Richardson ◽  
Radan Slavik
Keyword(s):  
Injection Locking ◽  
Optical Injection ◽  
Carrier Recovery ◽  
Optical Injection Locking

Clock and carrier recovery in high-speed coherent optical communication systems

2014 ◽  
Author(s):  
Sofia B. Amado ◽  
Ricardo Ferreira ◽  
Pedro S. Costa ◽  
Fernando P. Guiomar ◽  
Somayeh Ziaie ◽  
...  
Keyword(s):  
Optical Communication ◽  
Communication Systems ◽  
High Speed ◽  
Carrier Recovery ◽  
Optical Communication Systems ◽  
Coherent Optical Communication

scholarly journals Widely Linear Filtering for Multi-Impairment Compensation in Coherent Optical Systems

2021 ◽  
Author(s):  
Rekha Yadav ◽  
Lakshmi Narayanan Venkatasubramani ◽  
Ravinder David Koilpillai ◽  
Deepa Venkitesh
Keyword(s):  
Optical Communication ◽  
Communication Systems ◽  
Digital Processing ◽  
Optical Systems ◽  
Linear Filtering ◽  
Carrier Recovery ◽  
Iq Imbalance ◽  
Optical Communication Systems ◽  
Equalization Algorithm ◽  
Widely Linear

We propose a blind joint equalization algorithm for M-QAM signals based on a widely linear filtering approach. The proposed scheme jointly compensates receiver IQ imbalance and polarization mixing, along with carrier recovery, followed by transmitter IQ imbalance compensation. We first investigate the proposed scheme's tolerance to transceiver IQ Imbalance, polarization mixing, phase noise and frequency offset through numerical simulations for 32 GBd PM-16QAM and PM-64QAM signals and compare its performance with the conventional digital processing algorithms. Further, with the proposed algorithm, we experimentally demonstrate the improvement in Q<sup>2</sup> value to up to ~ 1.22 dB for a 32 GBd PM-16QAM and ~ 3.72 dB for a 16 GBd PM-64QAM signal with a phase imbalance of 9<sup>o</sup>. We show that the MSE convergence of the proposed joint equalizer is much faster than conventional DSP algorithms. Deployment of such an equalizer in optical communication systems is beneficial due to its improved tolerance to multiple impairments, albeit with increased complexity.

scholarly journals Widely Linear Filtering for Multi-Impairment Compensation in Coherent Optical Systems

2021 ◽  
Author(s):  
Rekha Yadav ◽  
Lakshmi Narayanan Venkatasubramani ◽  
Ravinder David Koilpillai ◽  
Deepa Venkitesh
Keyword(s):  
Optical Communication ◽  
Communication Systems ◽  
Digital Processing ◽  
Optical Systems ◽  
Linear Filtering ◽  
Carrier Recovery ◽  
Iq Imbalance ◽  
Optical Communication Systems ◽  
Equalization Algorithm ◽  
Widely Linear

We propose a blind joint equalization algorithm for M-QAM signals based on a widely linear filtering approach. The proposed scheme jointly compensates receiver IQ imbalance and polarization mixing, along with carrier recovery, followed by transmitter IQ imbalance compensation. We first investigate the proposed scheme's tolerance to transceiver IQ Imbalance, polarization mixing, phase noise and frequency offset through numerical simulations for 32 GBd PM-16QAM and PM-64QAM signals and compare its performance with the conventional digital processing algorithms. Further, with the proposed algorithm, we experimentally demonstrate the improvement in Q<sup>2</sup> value to up to ~ 1.22 dB for a 32 GBd PM-16QAM and ~ 3.72 dB for a 16 GBd PM-64QAM signal with a phase imbalance of 9<sup>o</sup>. We show that the MSE convergence of the proposed joint equalizer is much faster than conventional DSP algorithms. Deployment of such an equalizer in optical communication systems is beneficial due to its improved tolerance to multiple impairments, albeit with increased complexity.

Dispersion Compensating Square Photonic Crystal Fiber for Optical Communication Systems

2009 ◽  
Vol 129 (4) ◽  
pp. 601-607
Author(s):  
Shubi F. Kaijage ◽  
Yoshinori Namihira ◽  
Nguyen H. Hai ◽  
Feroza Begum ◽  
S. M. Abdur Razzak ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Optical Communication ◽  
Communication Systems ◽  
Crystal Fiber ◽  
Optical Communication Systems
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