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Updated: Jul 13, 2026
The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Transformation of the multimode terahertz quantum cascade laser beam into a Gaussian, using a hollow dielectric
Andriy A Danylov1, Jerry Waldman, Thomas M Goyette
1Submillimeter-Wave Technology Laboratory, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA. andriy_danylov@student.uml.edu
Abstract:
We demonstrate that a short hollow dielectric tube can act as a dielectric waveguide and transform the multimode, highly diverging terahertz quantum cascade laser beam into the lowest order dielectric waveguide hybrid mode, EH(11), which then couples efficiently to the free-space Gaussian mode, TEM(00). This simple approach should enable terahertz quantum cascade lasers to be employed in applications where a spatially coherent beam is required.
