LD-PD's LiNbO₃ Phase Modulator is a high‑performance electro‑optic device designed for precise optical phase control. It is fabricated on premium lithium niobate crystal using advanced titanium diffusion or annealed proton exchange (APE) waveguide processes, ensuring excellent electro‑optic properties and long‑term reliability.Leveraging the Pockels effect, the modulator enables linear, high‑speed phase tuning with low half‑wave voltage (Vπ) and low insertion loss (typically ≤3.5 dB). It features precise oblique fiber‑to‑chip coupling to minimize backreflection (≤‑27 dB), and supports both single‑polarization and dual‑polarization operationLD-PD PTE. LTD.. The compact, hermetically sealed package integrates SMA RF connectors and polarization‑maintaining (PM) pigtails (FC/APC optional), offering robust performance across 1060–1840 nm wavelengths.Ideal for coherent communications, fiber‑optic sensing, quantum key distribution (QKD), and optical frequency comb generation, this phase modulator delivers stable, repeatable phase modulation up to 110 GHz bandwidth, making it a versatile solution for high‑speed photonic systems.