论文信息 - Spot-size converter using vertical ridge taper for low fibre-coupling loss in 2.5%-Δ silica waveguides

Spot-size converter using vertical ridge taper for low fibre-coupling loss in 2.5%-Δ silica waveguides

A novel spot-size converter based on a vertical ridge waveguide taper for super-high-Δ silica waveguides is demonstrated. This structure can be formed with a simple fabrication process. The coupling loss between a singlemode fibre and a 2.5%-Δ silica waveguide was reduced to 0.31 dB/point compared to 2.7 dB/point for conventional straight waveguides.

[1] H. Ishikawa,et al. 2.5%-/spl Delta/ silica-based athermal arrayed waveguide grating employing spot-size converters based on segmented core , 2005, IEEE Photonics Technology Letters.

[2] T. Saida,et al. Optical spotsize converter using narrow laterally tapered waveguide for planar lightwave circuits , 2004, Journal of Lightwave Technology.

[3] Mikitaka Itoh,et al. Large reduction of singlemode-fibre coupling loss in 1.5% /spl Delta/ planar lightwave circuits using spot-size converters , 2002 .

[4] Yasuo Kokubun,et al. Low-loss spot-size transformer by dual tapered waveguides (DTW-SST) , 1990 .