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Simulation of heterodyne RoF systems based on 2 DFB lasers: application to an optical phase-locked loop design

Published online by Cambridge University Press:  19 February 2014

Wosen-Eshetu Kassa ,
Anne-Laure Billabert ,
Salim Faci  and
Catherine Algani
Wosen-Eshetu Kassa*
Affiliation:
Conservatoire National des Arts et Métiers, ESYCOM, 75141 Paris Cédex 3, France. Phone: +33 140272082
Anne-Laure Billabert
Affiliation:
Conservatoire National des Arts et Métiers, ESYCOM, 75141 Paris Cédex 3, France. Phone: +33 140272082
Salim Faci
Affiliation:
Conservatoire National des Arts et Métiers, ESYCOM, 75141 Paris Cédex 3, France. Phone: +33 140272082
Catherine Algani
Affiliation:
Conservatoire National des Arts et Métiers, ESYCOM, 75141 Paris Cédex 3, France. Phone: +33 140272082
*
Corresponding author: W. E. Kassa Email: woseneshetu.kassa@cnam.fr
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Abstract

This paper presents a simulation approach of optical heterodyne systems by using the equivalent circuit representation of a distributed feedback laser (DFB) in the electrical domain. Since the electrical representation of the DFB laser is developed from the rate equations, its characteristics such as non-linearity, relative intensity noise (RIN), and phase noise can be predicted precisely for various biasing conditions. The model is integrated in a heterodyne radio over fiber (RoF) system where two DFB lasers are used to generate a millimeter-wave (mm-wave) signal. An optical phase-locked loop is also introduced to reduce the phase noise on the mm-wave signal. The optical phase noise contribution of individual lasers to the mm-wave signal is evaluated and compared with theoretical results. It is shown that the phase noise of the mm-wave is reduced considerably depending on the loop bandwidth and propagation delay. With the circuit simulation approach proposed, optical and mm-wave phase noises can be studied together with other circuit environments such as parasitic effects and driver circuits.

Keywords

Millimeter-wave generationOptical noiseOPLLSemiconductor laser diode
Type
Articles Selected from the 2013 National Microwave Days in France
Information
International Journal of Microwave and Wireless Technologies , Volume 6 , Issue 2 , April 2014 , pp. 207 - 211
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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References

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