[22a-D215-1~9] 3.14 Optical control devices and optical fibers

[22a-D215-4] Blue Light Resistance of Zr-doped Silica-based Planar Lightwave Circuits

〇Yuji Fujiwara¹, Junji Sakamoto¹, Toshikazu Hashimoto¹, Kei Watanabe¹ (1.NTT Device Technology Labs.)

Keywords:Silica-based Planar Lightwave Circuit, visible light, Zr-doped silica

In recent years, compact and highly functional visible light devices using silica-based PLC (Planar Lightwave Circuit) have been proposed. In the conventional silica-based PLC, germanium-doped SiO₂ is usually used as a core. It is a problem that the effective refractive index(Neff) of conventional PLC degraded due to germanium at the input of high power blue light. In this report, a new silica-based PLC using zirconia doped SiO₂ as a core was fabricated to suppress this Neff change, and the stability of Neff was evaluated when 405, 445, and 473 nm blue light input.