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Integrated MLL chip-based PAM-4/DMT-16QAM photonic-wireless link in W-band for flexible applications
Optics Express
|June 22, 2021
Summary
Future wireless systems use millimeter wave (MMW) bands for higher speeds. This study demonstrates a simplified MMW photonic-wireless system using integrated lasers for flexible, high-speed data transmission.
Area of Science:
- Optoelectronics
- Wireless Communication
- Integrated Photonics
Background:
- Exponential growth in wireless traffic necessitates higher bandwidths, driving adoption of millimeter wave (MMW) frequencies.
- Future wireless systems demand high speed, low cost, compact, and simple configurations.
- Integrated light source-based intensity modulation and direct detection (IM-DD) photonic-wireless systems offer advantages over traditional bulky component systems.
Purpose of the Study:
- To experimentally demonstrate a lens-free MMW photonic-wireless transmission system in the W-band.
- To evaluate the performance of pulse-amplitude modulation with four levels (PAM-4) and discrete multi-tone with 16-quadrature amplitude modulation (DMT-16QAM) schemes.
- To investigate simplified receiver configurations for flexible wireless applications.
Main Methods:
- Utilized an integrated mode-locked laser (MLL) chip as an on-chip single light source for W-band signal generation and transmitter simplification.
- Employed two coherent optical carriers, modulated with data and then combined at a photodiode, to enhance signal-to-noise ratio.
- Investigated two receiver configurations: a mixer-based receiver for PAM-4/DMT-16QAM and an envelope detector (ED) for PAM-4.
Main Results:
- Successfully demonstrated a lens-free PAM-4 and DMT-16QAM MMW photonic-wireless transmission system in the W-band.
- Achieved a net data rate of up to 31.75 Gbit/s with the mixer-based PAM-4/DMT-16QAM systems.
- The ED-based system offers a simpler, lower-cost solution suitable for lower data rate applications.
Conclusions:
- The integrated MLL-based photonic-wireless system provides a flexible and simplified approach for future W-band communication.
- The mixer-based receiver enables high data rates (up to 31.75 Gbit/s) for demanding applications.
- The ED-based receiver offers a cost-effective solution for lower data rate requirements, enhancing system applicability.
