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Open CourseWare >> Master 2 - 3A >> Scientific course-Palaiseau
Lecturer :

Henri Benisty
  

Teaching staff :
Pierre Ferdinand
Fetah Benabid
Géraud Bouwmans

Level : Graduate

Course Language : French

Term : Winter & Spring

Number of hours : 18

ECTS Credits : 3
0315 Advanced Fibers
Teaching site :
The objective of the course is to familiarize students with concepts and advanced applications of fibers around three themes : fiber-sensors, microstructured fibers, new applications for amplification and lasers based on innovative fibres

----- Optical fiber sensors (9h) (P. Ferdinand)
The use of fibers as sensors leads to very versatile and increasingly widely spread devices, for instance fibers…
--with a Bragg gating, to allow the monitoring of strain in large or medium-scale structures and systems
-- with deliberate birefringence, or with magneto-optical effects, for the detection along the fibre of many possible external physical quantities, such as temperature for instance.

--> Use of the Poincaré sphere is an important tool for understanding several phenomena. Many practical examples will be given.

------ Microstructured fibers (6h) (F. Benabid)
[follow-up of a course by D. Pagnoux that was inserted in Nanophotonics,slides in English, most likely]

-- The remarkable photonic properties of microstructured optical fibers (FMAS in french :FMAS Fibres microstructurées Air Silice) also often called photonic crystal fibers (PCF) are explained, and advanced applications that have already enjoyed a considerable success are presented :
- Remarkable dispersion : eternally monomode for instance
- weak nonlinearities and minimal absorption in hollow core fibers
- giant nonlinearities in fobers with modes highly-confined in the core
--> These nonlinearities make these fibers the devices of choice nowadays for the generation of supercontinuum from pulsed laser light.
(used for « fequency combs » in ultra-precise metrology , see the Nobel prize awarded in 2004 to Theodor Hänsch in part)

New applications for amplification and lasers of innovative optical fibers (G. Bouwmans, Lille)
(will be updated soon, first course in january 2017)

Requirements : Basics of optical telecommunications (fibres, modes, rate), basics of structured media (concept of forbidden bandgap or reflection band in 1D), mode coupling.

Evaluation mechanism : In 2017: First "controle continu" (valid as exam for IOGS students) : fridat Februray 10th at 16h. Final exam (for master students) : February 24th, 2h duration.

Last Modification : Friday 11 September 2009

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