Optimized Design and Simulation of a Compact TFLN-Based Integrated Device for Simultaneous Polarizing and Equal-Power Beam Splitting | Zendy

Wenxuan Pei | Zendy; Zhen Zhou | Zendy; Xinyu Li | Zendy; Yang Lu | Zendy; Wentao Li | Zendy; Anxu Huang | Zendy; Di Feng | Zendy; Hongchen Jiao | Zendy; Lishuang Feng | Zendy

Open Access

Optimized Design and Simulation of a Compact TFLN-Based Integrated Device for Simultaneous Polarizing and Equal-Power Beam Splitting

Author(s) -

Wenxuan Pei,

Zhen Zhou,

Xinyu Li,

Yang Lu,

Wentao Li,

Anxu Huang,

Di Feng,

Hongchen Jiao,

Lishuang Feng

Publication year - 2025

Publication title -

ieee photonics journal

Language(s) - English

Resource type - Magazines

SCImago Journal Rank - 0.725

H-Index - 73

eISSN - 1943-0655

DOI - 10.1109/jphot.2025.3590348

Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics

We present a compact thin-film lithium niobate integrated device simultaneously achieving high polarization extinction ratio and equal-power beam splitting, using two optimized oppositely-tapered graded-slope mode converters monolithically integrated with a multimode interference coupler. The converter's geometric profile is designed through a developed analytical method that evaluates local mode conversion efficiency, enabling flexible geometry customization for diverse applications. Based on this analytical method, the performance simulations and optimization are presented. The proposed integrated device's high extinction ratio, broad bandwidth, and fabrication tolerance show particular promise for precision optical sensing applications including fiber-optic gyroscopes.

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