Title :
Compact and Low-Loss Coherent Mixer Based on High Δ ZrO2-SiO2 PLC
Author :
Takahashi, Masaharu ; Uchida, Yasuo ; Yamasaki, Shintaro ; Hasegawa, Junichi ; Yagi, Takeshi
Author_Institution :
Dept. of Fitel Photonics Lab., Furukawa Electr., Ichihara, Japan
Abstract :
In this paper, we report design and characteristics of a compact coherent mixer based on high Δ planar lightwave circuit (PLC) which consists of ZrO2-doped silica glass. The PLC with 5% or more Δ is realized by employing ZrO2 as a dopant. Propagation loss of the fabricated 5.5%-Δ ZrO2-SiO2 PLC is reduced to 0.02 dB/cm by an optimized fabrication process. A coherent mixer is designed and fabricated by using ZrO2-SiO2 PLC and size of the mixer chip is reduced to 4 mm × 2 mm. Coupling loss between standard single-mode fiber and ZrO2-SiO2 PLC is reduced to less than 0.31 dB/facet by an optimized spot-size converter.
Keywords :
glass; mixers (circuits); optical communication equipment; optical fabrication; optical losses; silicon compounds; zirconium compounds; ZrO2-SiO2; ZrO2-doped silica glass; compact coherent mixer; coupling loss; low-loss coherent mixer; mixer chip size; optimized spot-size converter; planar lightwave circuit; propagation loss; standard single-mode fiber; Couplings; Glass; Insertion loss; Loss measurement; Mixers; Optical waveguides; Propagation losses; Coherent mixers; optical communication; optical device fabrication; optical waveguides; planar lightwave circuits; spot-size converters;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2338914
