Integrated polarization beam splitters in the silicon nitride platform for 950 nm and 1300 nm wavelengths

• DOI: 10.1364/ol.560110
• Publication Date: 2025-03-13T14:00:29Z
• Authors: Zindine Mokeddem; William Fraser; Martin Vachon; Winnie N. Ye; Laurent Vivien; Delphine Marris-M...; Eric Cassan; Carlos Alonso-Ramos; Dan-Xia Xu; Jianhao Zhang; Maziyar Milanizadeh; Yuri Grinberg; Pavel Cheben; Jens H. Schmid; Daniele Melati
• Keywords: Beam splitter

Photonic integration in a silicon nitride (SiN) platform enables low propagation losses and wide transparency range, making it ideal for quantum applications. However, polarization control SiN is challenging because of its birefringence. This work demonstrates beam splitters using asymmetric directional couplers SiN, designed 950 nm 1300 wavelengths. These devices exhibit insertion (<1 dB) high extinction ratios (20 dB-30 dB).