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Development of Low Loss Ultra-High Δ ZrO2-SiO2 PLC for Next Generation Compact and High-Density Integrated Devices
Masanori TAKAHASHI Yasuyoshi UCHIDA Shintaro YAMASAKI Junichi HASEGAWA Takeshi YAGI
IEICE TRANSACTIONS on Electronics
Publication Date: 2014/07/01
Online ISSN: 1745-1353
Type of Manuscript: INVITED PAPER (Special Section on Opto-electronics and Communications for Future Optical Network)
integrated optics, MMI coupler, optical communication, optical device, planar lightwave circuit,
Full Text: FreePDF
For next generation planar lightwave circuit (PLC) devices, high function and high-density integration are required as well as downsizing and cost reduction. To realize these needs, high refractive index difference between a core and a clad (Δ) is required. To use PLC for practical applications, silica-based PLC is one of the most attractive candidate. However, degradation of the optical properties and productivity occur when Δ of the core becomes high. Thus, Δ of most of the conventional PLC with GeO2-SiO2 core is designed less than 2.5%. In this paper, we report a silica-based ultra-high Δ PLC with ZrO2-SiO2 core. 5.5%-Δ ZrO2-SiO2 PLC has been realized with low propagation loss and basic characteristics has been confirmed. Potential of chip size reduction of the ZrO2-SiO2 PLC is shown.