9-13 July 2012
Africa/Johannesburg timezone
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Characterization of spectral broadening of femtosecond pulses in microstructured fiber

Presented by Mr. Wilfrid NDEBEKA on 10 Jul 2012 from 17:30 to 19:30
Type: Poster Presentation
Session: Poster Session
Track: Track C - Photonics

Abstract

Recently it has been shown that all normal dispersion photonic crystal fibre (PCF) can be used for efficient coherent supercontinuum generation. A brief summary of the theoretical basis of this PCF design is presented. The experimental setup is discussed and results are presented. The spectral broadening of femtosecond laser pulses (λ = 800 nm, 75 fs, 80 MHz rep. rate) in a microstructured fiber (core diameter of 2.3 ± 0.3 µm) as a function of input energy is presented and the results are discussed for two different lengths of PCF (15 cm and 20 cm). High coupling efficiencies were achieved and typically spectral broadband output (630 nm – 1000 nm) was observed. The effect of laser polarization and strain of the fiber on the polarization of the supercontinuum output was investigated. By laterally stressing the fibre with a load, polarization selection of the output was achieved. A brief outlook on future work and potential applications are presented.

Award

Yes

Level

PhD

Supervisor

Erich Rohwer (egr@sun.ac.za) Laser Research Institute, University of Stellenbosch

Paper

Yes

Place

Location: IT Building
Room:


Primary authors

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Co-authors

  • Mr. Peter BARICHOLO National University of Science and Technology, Department of Applied Physics, Bulawayo, Zimbabwe
  • Dr. Pieter NEETHLING Laser Research Institute, Physics Department, University of Stellenbosch
  • Dr. Alexander HEIDT Optoelectronics Research Centre, University of Southampton, United Kingdom
  • Prof. Erich ROHWER Laser Research Institute, Physics Department, University of Stellenbosch
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