Polymer/silica hybrid waveguide Y-branch power splitter with loss compensation based on NaYF₄: Er³⁺, Yb³⁺ nanocrystals

A polymer waveguide Y-branch power splitter with loss compensation is proposed based on NaYF₄:Er³⁺, Yb³⁺ nanocrystals prepared by a high temperature thermal decomposition method. The Y-branch power splitter is designed as a structure of embedded waveguide, and its core material is nanocrystals-doped SU-8. The insertion loss of the device is~15 dB. For an input signal power of 0.05 mW and a pump power of 267.7 mW, the two branches with 5.81-dB and 5.41-dB loss compensations at 1530 nm are achieved respectively. A polymer waveguide Y-branch power splitter with loss compensation has an important research significance.