Single-mode waveguide propagation and reshaping of sub-ps terahertz pulses in sapphire fibers
- 10 April 2000
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 76 (15) , 1987-1989
- https://doi.org/10.1063/1.126231
Abstract
Waveguide propagation of sub-ps terahertz pulses in single-crystal sapphire fibers is reported. An incident THz pulse of approximately 0.6 ps duration undergoes considerable reshaping due to the absorptive and dispersive waveguide propagation, resulting in transmitted chirped pulse durations of 10–30 ps. Good agreement between theory and experiment is obtained by analyzing the propagation in terms of the single HE11 waveguide mode. The dominance of the single HE11 mode, despite the fiber dimensions allowing for multimode propagation, is attributed to the free-space to waveguide coupling.Keywords
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