Barkhausen conditions and starting of an optoelectronic oscillator
We propose in this paper to come back to the starting conditions of optoelectronic oscillators and in particular with regard to the Barkhausen conditions. The context is first of all the anniversary of the hundred years since the discovery of We propose in this paper to come back to the starting conditions of optoelectronic oscillators and in particular with regard to the Barkhausen conditions. The context is first of all the anniversary of the hundred years since the discovery of oscillations conditions and their optimization by Heinrich Barkhausen, whose principles we recall . We then give through the study of an example, how these conditions are relevant to optimize the start of the oscillation. The type of optoelectronic oscillator chosen for this study is an optoelectronic oscillator based on optical delay lines. The optical signal carrier wavelength is 1.55 μm, the typical oscillation frequency is 10 GHz [2 – 5]. It is all the more interesting to approach this subject in the context of the centenary of this discovery, which we can see how the advances made possible by H. Barkhausen are essential and still relevant today
Ctr. National de la Recherche Scientifique, Univ. de Bourgogne Franche Comté, FEMTO-ST Institute (France)
Dr. Patrice Salzenstein holds Master of Research degree, Graduate Engineering school degree and PhD in Electronics, University of Sciences and Technologies of Lille (USTL'96). Between 1996 and 2001 he worked near Paris, France, at Thomson CSF LCR (now Thales-TRT), Alcatel Alsthom Recherche, LCIE private research laboratories. He has been working since 2001 for CNRS, a government-funded research organization under administrative authority of France's Ministry of research, at FEMTO-ST institute in Besancon, in Electronic Engineering domain. In 2010, one of his articles was featured in Electronics Letters for his participation with Czech and Swiss colleagues to the best frequency stability ever measured on a quartz crystal oscillator: 2.5×10-14 at 5 MHz. Between 2010 and 2017, his fields of interest in research were for optoelectronic resonators and oscillators for microwaves photonics applications. He is now with the Micro nano Science & Systems department of CNRS UMR 6174 FEMTO-ST.