Broadband terahertz fiber directional coupler

Kristian Nielsen, Henrik K. Rasmussen, Peter Uhd Jepsen, Ole Bang

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We present the design of a short broadband fiber directional coupler for terahertz (THz) radiation and demonstrate a 3 dB coupler with a bandwidth of 0:6 THz centered at 1:4 THz. The broadband coupling is achieved by mechanically downdoping the cores of a dual-core photonic crystal fiber by microstructuring the cores. This is equivalent to chemical downdoping but is easier to realize experimentally.
Original languageEnglish
JournalOptics Letters
Issue number17
Pages (from-to)2879-2881
Publication statusPublished - 2010

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