V.M. Andreev - Dr. Sc. (Eng.), Professor, Ioffe Physical-Technical Institute (St Petersburg) D.F. Zaitsev - Dr. Sc. (Eng.), Main Designer, Laboratory RFS, JSC «CRET» E-mail: zaysev@yandex.ru N.Yu. Novikov - Ph. D. (Eng.), Deputy Head of Laboratory RFS, JSC «CRET» V.S. Kalinovsky - Senior Research Scientist, Ioffe Physical-Technical Institute (St Petersburg) D.V. Mordasov - Junior Research Scientist, Laboratory RFS, JSC «CRET» S.O. Slipchenko - Ph. D. (Phys.-Math.), Senior Research Scientist, Ioffe Physical-Technical Institute (St Petersburg) I.S. Tarasov - Dr. Sc. (Phys.-Math.), Professor, Main Research Scientist, Ioffe Physical-Technical Institute (St Petersburg) A.I. Fadeev - Junior Research Scientist, Laboratory RFS, JSC «CRET»

In the last decade intensively developed in the world combined (hybrid) lines of communication «Radio-on-Fiber» (RoF), which brings together fixed line fiber optic line with essential lines of communication with moving objects (Wi-Fi, Wi-Max, cell lines 3G and 4G, etc.) [1−18]. However, most of the terminal antenna system devices, described in many sources volatile, as they have in its composition powerful electronic wideband amplifiers ie require for their operation a third-party or internal sources of supply, which greatly increases their weight, cost, reduces reliability, efficiency, and most importantly, makes these terminals are not applicable for objects with increased explosion and fire risk, where reliable communication is of special value (mines, storage of explosives, chemicals, etc.) because of the probability of short circuits and sparking. Therefore, the creation of terminal non-volatile devices broadband «Radio-on-Fiber» large enough to service a significant number of subscribers within a radius of about 1 km (the last mile) is an urgent task. The first practical step in the establishment of such antennas was the elimination of the radio frequency amplifiers of the terminal part of the antenna device, such antenna usually referred to as «Fiber to the antenna» (fiber-to-the antenna system, or abbreviated (FTTA) [12] or photonic antennas [13−17]. However, such antennas have retained partial dependence due to the presence of the electrical bias of the photodetector (photodiode in the photodiode mode) and electric displacement of the operating point of the optical modulator. The development of the transmitting circuits, «Radio-on-Fiber» non-volatile antennas for a long time was hampered by the lack of powerful sources of optical signal with a wideband modulation having a high efficiency and fiber output optical fiber for transmitting significant optical power with low loss wide frequency band modulation and high-speed photodetectors optical signal, effectively working in the photovoltaic mode (without electrical offset). In this paper describes a powerful (over 1 W) broadband photonic fiber-optic lines for transmission of pulse signals of the nanosecond range (up to several ns) the duration variable in a wide range of frequencies (from kHz to several tens MHz) and their subsequent broadcast on a broadband channel using non-volatile photonic antennas.

 

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