Zastosowanie konwersji modulacji częstotliwości na modulację amplitudy w światłowodowych systemach transmisji o dużych przepływnościach

Krzysztof Perlicki


The conversion of frequency modulation to amplitude modulation due to fiber chromatic dispersion is described. A 5 Gb/s optical transmission system is presented. It uses the method of FM-AM conversion supported transmission. The computer simulation are carried out for a system with the following characteristics. The transmitted optical sygnal is modulated by an 7 augmented pRBS of length 2 - 1. The fiber dispersion is 17 ps/nm . km, the loss is 0,2 dB/km. Optical in-line amplifier is inserted at 100 km. The gain of the amplifier is chosen to compensation of the fiber loss. A first orderButterworth filter at the receiver is used. A new analysis of conversion of a frequency-modulated signal to amplitude modulation trough dispersion in an optical fiber is presented. The propagation of optical field through a fiber is described by nonlinear Schrodinger equation, which is solved numerically by the split-step Fourier method. Novel method of laser frequency modulation for Dispersion Supported Transmission gives optical binary signal at the receiver with greater values of the extinction coefficient as compared to the previous reseach at least in the range of 100 km < L < 200 km. The most important result of this investigation is that the maximum signal to noise ratio is reached at fR = 5 GHz for fiber lengths in the range 100 km < L < 200 km. The optimum value of the receiver low-pass filter bandwidth is almost independent of the fiber length. This frequency satisfies the Nyquist criterion.
Author Krzysztof Perlicki IT
Krzysztof Perlicki,,
- The Institute of Telecommunications
Other language title versionsHigh capacity transmission using FM-AM supported transmission
Journal seriesKwartalnik Elektroniki i Telekomunikacji, ISSN 0867-6747
Issue year1998
Publication size in sheets1.5
Keywords in Polishtelekomunikacja światłowodowa, konwersja modulacji częstotliwości na modulację amplitudy, dyspersja światłowodu
Keywords in Englishoptical communication, frequency modulation, amplitude modulation conversion, dispersion supported transmission
Abstract in PolishW pierwszej części artykułu przedstawiono analizę zjawiska konwersji modulacji częstotliwości na modulację amplitudy w standardowym światłowodzie jednomodowym, która powodowana jest przez dyspersję chromatyczną włókna optycznego. Część druga opisuje właściwości systemu transmisji danych o przepływności 5 Gbit/s wykorzystujący zjawisko konwersji.
Languagepl polski
Score (nominal)0
Citation count*0 (2014-02-16)
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