Topic
Optical Carrier transmission rates
About: Optical Carrier transmission rates is a research topic. Over the lifetime, 2463 publications have been published within this topic receiving 33293 citations.
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Patent•
23 Aug 2002
TL;DR: In this paper, a method of transmitting an optical communications signal, comprising receiving a first signal, encoding the signal with a differential or duobinary encoding scheme (52), encoding the signals with an oscillating signal component (52) and modulating the signal onto a sub-carrier of an optical carrier signal (56, 58), was proposed.
Abstract: A method of transmitting an optical communications signal, comprising receiving a first signal, encoding the signal with a differential or duobinary encoding scheme (52), encoding the signal with an oscillating signal component (52), and sub-carrier modulating the signal onto a sub-carrier of an optical carrier signal (56, 58). The invention also relates to corresponding systems and apparatuses.
79 citations
TL;DR: In this paper, a novel wavelength reuse scheme for uplink connection in a radio-over-fiber (ROF) system is proposed, where the dual-mode lightwave generated by optical carrier suppression modulation is separated by an optical interleaver.
Abstract: We have experimentally demonstrated a novel wavelength reuse scheme for up-link connection in a radio-over-fiber (ROF) system. The dual-mode lightwave generated by optical carrier suppression modulation is separated by an optical interleaver. One of the dual-mode lightwaves is modulated with a baseband data at 2.5 Gb/s. The other lightwave will be used for the optical carrier for the up-link data modulation. There is no additional laser source for the upstream data generation in the base station. By this method, we simplify the configuration of the ROF system and reduce the cost of the system
78 citations
TL;DR: In this paper, the authors proposed a novel technique for wavelength reuse to simplify the upstream optical interface of an antenna base station in a millimeter-wave fiber-wireless system incorporating wavelength division multiplexing.
Abstract: A novel technique for wavelength reuse has been proposed to simplify the upstream optical interface of an antenna base station in a millimeter-wave fiber-wireless system incorporating wavelength division multiplexing. This technique is based on recovering the optical carrier used in downstream signal transmission and reusing the same wavelength for upstream signal transmission. Two novel configurations for optical carrier recovery and wavelength reuse are proposed and demonstrated experimentally.
78 citations
TL;DR: In this paper, an optical carrier is divided into two parts, one part is phase modulated and the other one is intensity modulated, and the two differently modulated optical signals are then launched into single-mode fibers with the same lengths to introduce microwave signal power fading.
Abstract: We propose a novel photonic technique for measuring microwave frequency instantaneously over a wide bandwidth. In our approach, an optical carrier is divided into two parts. Both parts are modulated by an unknown microwave signal; one part is phase modulated while the other one is intensity modulated. The two differently modulated optical signals are then launched into single-mode fibers with the same lengths to introduce microwave signal power fading. After photodetection, the radio-frequency powers of the two parts are used to generate an amplitude comparison function which provides a frequency-to-power mapping. The proposed scheme is simple and is experimentally verified over a frequency range of 13.5 GHz with a measurement error less than plusmn0.3 GHz.
77 citations
TL;DR: In this article, the authors present a novel uplink transmission in radio-over-fiber distribution systems, which employs remote downconversion of the uplink data to intermediate frequency (IF) in the base station (BS).
Abstract: The authors present a novel technology for uplink transmission in radio-over-fiber distribution systems. The technique employs remote downconversion of the uplink data to intermediate frequency (IF) in the base station (BS). The local oscillator signal for the downconversion is optically generated in the central station (CS) and sent to the BS via optical fiber. The IF uplink data is then modulated onto an optical carrier, retrieved from the downlink signal, and sent to the CS, where the baseband conversion takes place. By employing this method of uplink connection, simplicity and cost efficiency of the BS is achieved
76 citations