Title :
Fiber-optic 40-GHz mm-wave link with 2.5-Gb/s data transmission
Author :
Wiberg, Andreas ; Pérez-Millán, Pere ; Andrés, Miguel V. ; Andrekson, Peter A. ; Hedekvist, Per Olof
Author_Institution :
Dept. of Microtechnology & Nanoscience, Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
A broad-band millimeter-wave (mm-wave) transmission link for downstream transmission is investigated. The mm-wave carrier is created by a dual-frequency optical source based on suppressed-carrier double-sideband modulation of a narrow linewidth laser. The optical sidebands generated in the modulation are divided into two separate fibers by filtering with fiber Bragg gratings. One of the waves is modulated with baseband data up to 2.5 Gb/s. The fibers are combined and connected with the base station (BS) via a single-mode fiber. At the BS, the mm-wave modulated signal with data is created with a wide bandwidth photodetector through heterodyne mixing of the two optical waves. This mm-wave signal is amplified and transmitted to the mobile unit, where the reception is performed using self-homodyne mixing, in order to ensure carrier frequency independence. Error-free data transmission was demonstrated for the downlink after 44 km of single-mode optical fiber.
Keywords :
Bragg gratings; microwave photonics; optical fibre communication; optical fibre filters; optical modulation; photodetectors; 2.5 Gbit/s; 40 GHz; 44 km; broadband transmission link; carrier frequency independence; data transmission; double-sideband modulation; downlink; downstream transmission; dual-frequency optical source; error-free data transmission; fiber Bragg gratings; fiber-optic link; heterodyne mixing; millimeter-wave carrier; millimeter-wave link; narrow linewidth laser; optical sidebands; optical waves; self-homodyne mixing; single-mode fiber; single-mode optical fiber; suppressed-carrier modulation; wave modulation; wide bandwidth photodetector; Base stations; Baseband; Data communication; Fiber lasers; Filtering; Optical fiber filters; Optical fibers; Optical filters; Optical mixing; Optical modulation; Data transmission; fiber Bragg gratings (FBG); fiber-optic millimeter-wave (mm-wave) link; gigabits per second (Gb/s); microwave photonics;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.853035
