Related Experiment Video
Updated: Mar 3, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
Adaptively loaded IM/DD optical OFDM based on set-partitioned QAM formats
Abstract:
We investigate the constellation design and symbol error rate (SER) of set-partitioned (SP) quadrature amplitude modulation (QAM) formats. Based on the SER analysis, we derive the adaptive bit and power loading algorithm for SP QAM based intensity-modulation direct-detection (IM/DD) orthogonal frequency division multiplexing (OFDM). We experimentally show that the proposed system significantly outperforms the conventional adaptively-loaded IM/DD OFDM and can increase the data rate from 36 Gbit/s to 42 Gbit/s in the presence of severe dispersion-induced spectral nulls after 40-km single-mode fiber. It is also shown that the adaptive algorithm greatly enhances the tolerance to fiber nonlinearity and allows for more power budget.
Related Concept Videos
Beams with Unsymmetric Loadings
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
Beams with Symmetric Loadings
The M/EI...
Cable Subjected to a Distributed Load
Extraction: Partition and Distribution Coefficients
For extracting a solute from an aqueous phase into an...
Frequency-Domain Interpretation of PD Control
The proportional control gain, combined with the...
Transmission Line Design Considerations

