BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4//
BEGIN:VEVENT
UID:20260523T215422EDT-3458HTFbCZ@132.216.98.100
DTSTAMP:20260524T015422Z
DESCRIPTION:Abstract\n\nSince its discovery\, soliton self-frequency shift 
 (SSFS) has been subject of many applications including widely wavelength t
 unable femtosecond laser sources\, broadband supercontinuum sources\, opti
 cal buffering\, photonic analog-to-digital conversion\, and multiphoton im
 aging. Several factors influence SSFS in an optical fiber\, and their coll
 ective impact is still unclear. This thesis presents an analytical descrip
 tion of the dynamics of SSFS in nonlinear optical fibers\, accounting for 
 loss\, gain\, and high-order linear and nonlinear effects. After an introd
 uction (chapter 1) and the presentation of basic physical concepts (chapte
 r 2)\, chapter 3 presents a high-order analytical expression of SSFS exper
 ienced by a fundamental soliton. This expression is a high-order extension
  of Gordon’s well-known formula\, but also including propagation losses\, 
 third-order dispersion\, and self-steepening. It also provides relative ma
 gnitudes of third-order dispersion and self-steepening responsible for the
  nonlinear evolution of SSFS. Chapter 4 presents an analytical expression 
 for the energy conversion efficiency (ECE) of Raman solitons resulting fro
 m high-order soliton fission. The theoretical framework accounts for inter
 pulse Raman scattering\, enhancing the accuracy of predicting ECE of Raman
  solitons compared to the inverse scattering method. An experiment is also
  developed to validate the enhancement of ECE of Raman solitons in the fis
 sion process. Chapter 5 presents moment equations that are developed to qu
 antify SSFS in amplifying fibers. These equations yield the SSFS in amplif
 ying fibers without extensive computational resources and unveil the optim
 al initial pulse chirp needed to achieve maximum SSFS and ECE. Chapter 6 p
 resents the experimental demonstration of the effect of pre-chirping on th
 e SSFS and ECE in an amplifying fiber. An initially chirped pulse at a wav
 elength of 1880 nm undergoes SSFS within a thulium-doped fiber amplifier\,
  generating tunable solitons in the 2000 nm spectral region. The experimen
 tal results show that SSFS and ECE are optimized when the initial pulse ch
 irp aligns with the theoretical prediction in Chapter 3. In conclusion\, t
 his thesis provides fundamental analytical tools that predict SSFS\, as we
 ll as they serve to optimize wavelength conversion and supercontinuum gene
 ration systems.\n
DTSTART:20250326T140000Z
DTEND:20250326T160000Z
LOCATION:Room 603\, McConnell Engineering Building\, CA\, QC\, Montreal\, H
 3A 0E9\, 3480 rue University
SUMMARY:PhD defence of Robi Kormokar – Soliton self-frequency shift in nonl
 inear optical fibers
URL:/ece/channels/event/phd-defence-robi-kormokar-soli
 ton-self-frequency-shift-nonlinear-optical-fibers-363870
END:VEVENT
END:VCALENDAR