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This study demonstrates a novel phase compensation technique for millimeter wave (mm-Wave) radio-over-fiber systems using a Fabry-Pérot laser comb. The method enables high-capacity data transmission over 10km fiber, overcoming phase noise limitations.

Area of Science:

Optical Communications
Wireless Networks
Signal Processing

Background:

Millimeter wave (mm-Wave) frequencies offer solutions for mobile network congestion.
Optical heterodyning is a scalable approach for mm-Wave generation, with potential for on-chip integration.
Residual phase noise in optical frequency comb (OFC) systems degrades transmission performance.

Purpose of the Study:

To demonstrate a high-capacity mm-Wave radio-over-fiber (RoF) system using a Fabry-Pérot (FP) laser comb.
To theoretically analyze and experimentally compensate for phase noise induced by FP laser frequency fluctuations.
To evaluate the performance of a pilot-based phase equalizer for improving transmission quality.

Main Methods:

Theoretical analysis of temporal phase perturbation in FP laser combs.

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Estimation and compensation of phase noise using a pilot-based phase equalizer.

Experimental and simulation-based performance evaluation of the compensation scheme.

Main Results:

Successful transmission of ten 200 MHz filtered orthogonal frequency division multiplexing (f-OFDM) signal bands (16-quadrature amplitude modulation, QAM) over 10 km fiber.
Demonstration of 16-QAM single carrier signals with 2 GBd and 8 Gbps data rate, showing resilience to phase noise.
First commercial Quantum Well FP laser-based optical heterodyning mm-Wave RoF system for both multi-carrier and single-carrier signals.

Conclusions:

The proposed pilot-based phase equalizer effectively compensates for phase noise in FP laser comb-based mm-Wave RoF systems.
The system supports high-capacity multi-user transmission, addressing future mobile network demands.
This work paves the way for practical implementation of advanced mm-Wave communication systems.