Chromatic Dispersion Monitoring of Optical OFDM Signals in Flexible Optical Networks

2013 ◽  
Author(s):  
Calvin C. K. CHAN
Keyword(s):  
Optical Networks ◽  
Chromatic Dispersion ◽  
Optical Ofdm ◽  
Ofdm Signals

Efficient Chromatic Dispersion Precompensation for Coherent Optical OFDM

2015 ◽  
Vol 27 (1) ◽  
pp. 30-33 ◽  
Author(s):  
Hae Young Rha ◽  
Chun Ju Youn ◽  
Byoung Goo Jeon ◽  
Hae-Wook Choi
Keyword(s):  
Chromatic Dispersion ◽  
Optical Ofdm

scholarly journals Adaptive Compensation of Bandwidth Narrowing Effect for Coherent In-Phase Quadrature Transponder through Finite Impulse Response Filter

2019 ◽  
Vol 9 (9) ◽  
pp. 1950 ◽  
Author(s):  
Qiang Wang ◽  
Yang Yue ◽  
Jian Yao ◽  
Jon Anderson
Keyword(s):  
Optical Networks ◽  
Impulse Response ◽  
Finite Impulse Response ◽  
Chromatic Dispersion ◽  
Polarization Mode Dispersion ◽  
Fir Filter ◽  
Coherent Signal ◽  
Analog To Digital ◽  
Mode Dispersion ◽  
Adaptively Adjusting

Coherent in-phase quadrature (IQ) transponders are ubiquitous in the long-haul and the metro optical networks. During the transmission, the coherent signal experiences a bandwidth narrowing effect after passing through multiple reconfigurable optical add-drop multiplexers (ROADMs). The coherent signal also experiences a bandwidth narrowing effect when electrical or optical components of the coherent IQ transponder experience aging. A dynamic method to compensate the bandwidth narrowing effect is thus required. In the coherent optical receiver, signal bandwidth is estimated from the raw analog-to-digital converter (ADC) outputs. By adaptively adjusting the tap coefficients of the finite impulse response (FIR) filter, simple post-ADC FIR filters can increase the resiliency of the coherent signal to the bandwidth narrowing effect. The influence of chromatic dispersion, polarization mode dispersion, and polarization dependent loss are studied comprehensively. Furthermore, the bandwidth information of the transmitted analog signal is fed back to the coherent optical transmitter for signal optimization, and the transmitter-side FIR filter thus changes accordingly.

scholarly journals REAM intensity modulator-enabled 10Gb/s colorless upstream transmission of real-time optical OFDM signals in a single-fiber-based bidirectional PON architecture

2012 ◽  
Vol 20 (19) ◽  
pp. 21089 ◽  
Author(s):  
E. Hugues-Salas ◽  
R. P. Giddings ◽  
X. Q. Jin ◽  
Y. Hong ◽  
T. Quinlan ◽  
...  
Keyword(s):  
Real Time ◽  
Single Fiber ◽  
Intensity Modulator ◽  
Optical Ofdm ◽  
Ofdm Signals
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