Three-dimensional on-chip mode converter

The implementation of transverse mode, polarization, frequency, and other degrees of freedom (d.o.f.s) of photons is an important way to improve the capability of photonic circuits. Here, a three-dimensional (3D) linear polarized (LP) LP mode converter was designed and fabricated using a femtosecond...

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Bibliographic Details
Published inOptics letters Vol. 48; no. 5; p. 1140
Main Authors Li, Ze-Zheng, Ouyang, Yang, Li, Zhong-Tian, Tian, Zhen-Nan, Zhang, Xu-Lin, Chen, Qi-Dai, Sun, Hong-Bo
Format Journal Article
LanguageEnglish
Published United States 01.03.2023
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Summary:The implementation of transverse mode, polarization, frequency, and other degrees of freedom (d.o.f.s) of photons is an important way to improve the capability of photonic circuits. Here, a three-dimensional (3D) linear polarized (LP) LP mode converter was designed and fabricated using a femtosecond laser direct writing (FsLDW) technique. The converter included multi-mode waveguides, symmetric Y splitters, and phase delaying waveguides, which were constructed as different numbers and arrangements of circular cross section waveguides. Finally, the modes (LP and LP ) were generated on-chip with a relatively low insertion loss (IL). The mode converter lays a foundation for on-chip high-order mode generation and conversion between different modes, and will play a significant role in mode coding and decoding of 3D photonic circuits.
ISSN:1539-4794
DOI:10.1364/OL.474307