Session Index

A growing concern and needed about sensing technologies to improve accuracy and quick detection. We will describe our recent works on design, testing and new applications.

 

A real-time four-level pulse amplitude modulation (PAM4) fiber-invisible laser light communication (IVLLC) and fiber-wireless hybrid system with parallel/orthogonally polarized dual-wavelength scheme is proposed and practically demonstrated. PAM4 bit error rate (BER) real-time measurement is adopted to prevent complex offline calculation by MATLAB.

 

We propose a modified 4D 32-SP-16QAM modulation format, which exhibits 2.22-dB gain in signal-to-noise-ratio over the conventional 32-SP-16QAM format, at a bit-error-rate of 10-3. Moreover, carrier phase recovery is realized with conventional blind phase search and which shows good performance.

 

We demonstrate a 58.74-Gbps 2x2 MIMO V-band OFDM RoF system, employing power detector for RF down-conversion. The gap between IF tone and OFDM signal is removed to achieve 24% improvement in data rate, and the beating interference is reduced to achieve 21% improvement in data rate by SSBI mitigation schemes.

 

We successfully transmitted an OFDM signal of ≥30 Gbps with Volterra nonlinear filtering in a 100-km DML-based transmission system. Applying ℓo-norm penalty to achieve sparse Volterra filtering, the computation complexity of Volterra filter can be reduced by 85% while the data rate remains at least 30 Gbps.

 

We report an 850 nm oxide-confined VCSEL operating at an error-free data transmission up to 50 Gb/s with a modulation bandwidth of 25 GHz at room temperature without using pre-emphasis, equalization, and forward error correction.