Related Experiment Video
Updated: May 25, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
Real-time 93.8-Gb/s polarization-multiplexed OFDM transmitter with 1024-point IFFT
Beril Inan1, Susmita Adhikari, Ozgur Karakaya
1Institute of Communications Engineering, Technische Universität München, Arcisstrasse 21 D-80333, Munich, Germany. beril.inan@tum.de
Abstract:
We demonstrate a 93.8-Gb/s real-time optical OFDM transmitter with 1024-point IFFT using polarization-multiplexing and 4-QAM modulation. This is the highest IFFT size implemented for OFDM to our knowledge. The limited resources of FPGA make it challenging to place and route such a high size IFFT. The implementation penalty of the real time transmitter compared to the case where FPGAs are used as an arbitrary waveform generators increases up to 2 dB for BER of 7x10(-4). An optical back-back measurement showed required OSNR of 26.5 dB for a BER of 10(-3).
Related Concept Videos
IR Frequency Region: X–H Stretching
Maximum Power Transfer
By substituting the entire circuit with...
Transmission Line Design Considerations
Properties of Fourier Transform I
In radio broadcasting, multiple audio signals often need to be transmitted simultaneously. The Fourier...
Propagation Speed of Electromagnetic Waves
IR Spectrum
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0% (complete...
