Riishede, Jesper3; Lægsgaard, Jesper2; Broeng, Jes4; Bjarklev, Anders Overgaard5
1 Glass Components and Materials, Department of Photonics Engineering, Technical University of Denmark2 Department of Photonics Engineering, Technical University of Denmark3 Department of Mechanical Engineering, Technical University of Denmark4 Crystal Fibre A/S5 Rector’s office, Administration, Technical University of Denmark
The use of low-index-contrast photonic bandgap (PBG) fiber for transmission of short pulsed light is discussed. PBG fibers have positive waveguide dispersion at long wavelengths at which conventional index-guiding fibers have negative waveguide dispersion. PBG fibers with low-index contrast can be used to obtain fibers with zero dispersion and a large mode area below 800 nm$+3$/. The results show that the PBG fiber is less sensitive to nonlinear effects and allows transmission of considerably larger intensities.