We report on advanced millimeter-wave (mm-wave) photonic components for broadband radio transmission. We have developed self-pulsating 60-GHz range quantum-dash Fabry-Perot mode-locked laser diodes (MLLD) for passive, i.e., unlocked, photonic mm-wave generation with comparably low-phase noise level of -76 dBc/Hz @ 100-kHz offset from a 58.8-GHz carrier. We further report on high-frequency 1.55-μm waveguide photodiodes (PD) with partially p-doped absorber for broadband operation (f3dB ~70-110 GHz) and peak output power levels up to +4.5 dBm @ 110 GHz as well as wideband antenna integrated photomixers for operation within 30-300 GHz and peak output power levels of -11 dBm @ 100 GHz and 6-mA photocurrent. We further present compact 60-GHz wireless transmitter and receiver modules for wireless transmission of uncompressed 1080p (2.97 Gb/s) HDTV signals utilizing the developed MLLD and mm-wave PD. Error-free (BER = 10-9, 231 - 1 PRBS, NRZ) outdoor wireless transmission of 3 Gb/s over 25 m is demonstrated, as well as wireless transmission of uncompressed HDTV signals in the 60-GHz band. Finally, an advanced 60-GHz photonic wireless system offering record data throughputs and spectral efficiencies is presented. For the first time, we demonstrate photonic wireless transmission of data throughputs up to 27.04 Gb/s (EVM 17.6%) using a 16-QAM OFDM modulation format resulting in a spectral efficiency as high as 3.86 b/s/Hz. Wireless experiments were carried out within the regulated 57-64-GHz band in a lab environment with a maximum transmit power of - 1 dBm and 23 dBi gain antennas for a wireless span of 2.5 m. This span can be extended to some 100 m when using high-gain antennas and higher transmit power levels.

/pdf/millimeter-wave-photonic-components-for-broadband-wireless-r677u9kuch.pdf

Millimeter-Wave Photonic Components for Broadband Wireless Systems

In this paper, a 60-GHz photonic millimeter-wave link system for short- to medium-range broadband wireless data transmission is investigated. The system employs advanced mm-wave photonic components and radio-over-fiber (RoF) techniques for the generation of a DSB-SC optical mm-wave carrier and its subsequent on-off-keying modulation and transmission. For short-range applications, we have constructed a compact wireless RoF transmitter consisting of a high-frequency photodiode and a mm-wave antenna only. This system achieved error-free (BER=10-9, 231-1 PRBS, NRZ) in-door transmission of 12.5-Gb/s signals over wireless distances up to 3.1 m with a receiver sensitivity as low as - 45.4 dBm . For fixed wireless access (FWA) requiring a bit error rate of 10-4, the maximum transmission distance for 12.5 Gb/s is increased up to 5.8 m. For medium-range broadband wireless transmission an electrical radio-frequency (RF) amplifier was employed in the RoF transmitter. Here we achieved 7.5-Gb/s error-free transmission in out-door line-of-sight experiments over wireless distances of up to 36 m. Based upon the experimental results, we expect that the maximum wireless distance the system could accommodate for 12.5 Gb/s is in the kilometer range when using high-gain antennas and an RF transmitter amplifier with a sufficient bandwidth.

60-GHz Photonic Millimeter-Wave Link for Short- to Medium-Range Wireless Transmission Up to 12.5 Gb/s

27 Gbit/s photonic wireless 60 GHz transmission system using 16-QAM OFDM

We address emerging threats to the security of photonic networks as these networks become heterogeneous being opened to the upper layers, other operators, and end users. We review the potential threats, mainly loss of the confidentiality of user data transmitted through optical fibers and disturbances of network control, both of which could seriously damage the entire network. We then propose a novel conceptual model of a secure photonic network by introducing a quantum key distribution (QKD) network to its legacy structure. Secure keys generated by the QKD network are managed by key management agents (KMAs) and used to encrypt not only user data but also control signals. The KMAs cooperate with the generalized multiprotocol label-switching controller for secure path provisioning and drive photonic and modern crypto engines in appropriate combinations. Finally, we present a roadmap of a deployment scenario, starting from niche applications such as mission critical and business applications and the next. Digital cinema distribution through a photonic network is presented as an example of a niche application.

Security in Photonic Networks: Threats and Security Enhancement

In this paper, we present a simple architecture for a super-broadband 60 GHz photonic wireless system. Using a cascaded optical RF and data modulation approach, advanced photonic components and a high-spectral efficient QAM-OFDM modulation format, we realized a compact 60 GHz photonic wireless system having a spectral efficiency as large as 3.86 bit/s/Hz. By making use of the 7 GHz spectral bandwidth in the 60 GHz band which was opened up for unlicensed broadband wireless services worldwide, we achieved record data throughputs. For example, by using a 16-QAM OFDM subcarrier modulation, we experimentally demonstrate photonic wireless transmission of 27.04 Gbit/s with a mean EVM of 17.63%. Wireless experiments were carried out in a lab environment with a maximum transmit power of -1 dBm and 23 dBi gain antennas for a wireless span of 2.5 m. This can be extended to some 100 m span when using high-gain antennas and higher transmit power levels.

http://ieeexplore.ieee.org/iel5/5325518/5342587/05461623.pdf

The potential use of radio over fiber techniques (RoF) is analyzed and discussed in the context of recent large scale optical fiber deployments in Europe for broadband access but as well in the context of home or in-building networks to provide very high data rates to the end-users in harmony with expected evolution of broadband connections. Main challenges for RoF include the current evolution toward an all IP network, the rapidity with which networks evolve and the lack of standardization work.

Upcoming perspectives and future challenges for ROF

We present mobile and wired services network on passive optical access infrastructure using variable optical splitters. An optical budget gain of about 2.25 dB is obtained. Variable splitters can be remotely powered through a fiber-optic link.

Scalable and multi-service passive optical access infrastructure using variable optical splitters

We successfully demonstrate a transmission of a high layer split mobile interface for cell-less, high-speed train network applications using a commercially available XGS-PON. Operation is also demonstrated for a GbE interface.

https://hal-imt-atlantique.archives-ouvertes.fr/hal-02018862/document

High-Speed Train Cell-Less Network Enabled by XGS-PON and Impacts on vRAN Split Interface Transmission

Radio-over-fiber signal transmission in stimulated-Brillouin-scattering (SBS)-limited systems is investigated. We found that SBS threshold is identical for 3G-RoF links and CW transmission and demonstrate that laser current modulation or increased SBS threshold fiber improves performance.

Brillouin Scattering in Radio over Fiber transmission

We develop a model of the radio over fiber (RoF) link based on baseband complex envelop. This model allows a complete simulation of RoF link (air and fiber propagation). We present and demonstrate this model for different modulation schemes.

H. Le Bras

Papers

Upcoming perspectives and future challenges for ROF

Scalable and multi-service passive optical access infrastructure using variable optical splitters

High-Speed Train Cell-Less Network Enabled by XGS-PON and Impacts on vRAN Split Interface Transmission

Brillouin Scattering in Radio over Fiber transmission

Equivalent Baseband Model of Radio over Fiber link