The following publications are possibly variants of this publication:
- Spatial mode multiplexer/demultiplexer based on tapered hollow waveguideHamed Dalir, Yasushi Yokota, Fumio Koyama. ieiceee, 8(9):684-688, 2011. [doi]
- Modeling of a low-loss spot-size converter for hollow waveguides with sub-wavelength air coreYasuki Sakurai, Fumio Koyama. ieiceee, 1(6):115-119, 2004. [doi]
- Modeling of hollow waveguide optical switch with variable air coreChang-Hwan Bae, Fumio Koyama. ieiceee, 1(18):551-555, 2004. [doi]