Skip to Main content Skip to Navigation
Theses

Oscillateurs optoélectroniques largement accordables et faible bruit pour les applications radar

Jérémy Maxin 1
1 LAAS-MOST - Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : The objectives of this thesis is the developement of two optoelectronic oscillator architectures dedicated to the generation of low noise microwave signals for radar applications. The first oscillator is based on the stabilization of the beatnote of a widely tunable dual- frequency laser with an optical fiber delay line. A fine analysis of the stabilization loop im- plemented with a 100 m long optical fiber allowed us to reach the technical limit fixed by the loop microwave amplifiers. The oscillator is tunable from 2.5 to 5.5 GHz by 2 MHz steps and present a phase noise power spectral density of -105 dBc/Hz at 10 kHz o ff set from the carrier (performance independent of the carrier frequency). The use of two optical fibers in a double delay lines architecture and of a fiber ring resonator as a delay line are also investigated. The second architecture developed is a coupled optoelectronic oscillator (COEO). The ar- chitecture, similar to a regenerative mode-locked laser, is realized by coupling a resonant laser cavity to a resonant optoelectronic loop. The developpement of this oscillator is based on a new architecture of SOA : an asymmetrical cladding semiconductor optical amplifier. This com- ponent o ff ers better saturation power and lower intrinsic noise than the « classical » design. The COEO operates around 10 GHz. A phase noise power spectral density of -135 dBc/Hz is measured at 10 kHz o ff set from the carrier.
Complete list of metadata

Cited literature [147 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/tel-01136576
Contributor : Arlette Evrard <>
Submitted on : Friday, March 27, 2015 - 3:29:43 PM
Last modification on : Thursday, June 10, 2021 - 3:07:07 AM
Long-term archiving on: : Tuesday, April 18, 2017 - 1:48:41 AM

Identifiers

  • HAL Id : tel-01136576, version 1

Citation

Jérémy Maxin. Oscillateurs optoélectroniques largement accordables et faible bruit pour les applications radar. Micro et nanotechnologies/Microélectronique. Universite Toulouse III Paul Sabatier, 2014. Français. ⟨tel-01136576⟩

Share

Metrics

Record views

547

Files downloads

3328