Cryogenic Nonlinear Optics in Titanium In-Diffused Lithium Niobate Waveguides for Quantum Photonics

Nina Amelie Lange

doi:10.17619/unipb/1-2568

May 20, 2026Open Access

Cryogenic Nonlinear Optics in Titanium In-Diffused Lithium Niobate Waveguides for Quantum Photonics

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Key Points

This work aims to evaluate the eligibility of titanium-diffused lithium niobate waveguides for quantum photonics under cryogenic conditions.
Developed a free-space coupled cryogenic setup for characterizations from room temperature to below 10K.
Demonstrated cryogenic parametric fluorescence optimized for degenerate photon pairs in the telecom range.
Modeled changes in refractive index and thermal contraction accurately.
Cryogenic performance indicates predictable and random effects.
TE-mode processes with pulsed light proved robust, while TM-mode processes were particularly vulnerable.
The pyroelectric effect emerged as the primary determinant of cryogenic performance.

Implication

Explores nonlinear frequency conversion in titanium-diffused waveguides for quantum photonics, suggesting performance potential at cryogenic temperatures.

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Cite This Study

Nina Amelie Lange (2026) studied this question.

synapsesocial.com/papers/6a192ed7fab5b468c4418136 https://doi.org/10.17619/unipb/1-2568

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Cryogenic Nonlinear Optics in Titanium In-Diffused Lithium Niobate Waveguides for Quantum Photonics

Key Points

Implication

Abstract

Discussion

Cite This Study

Cryogenic Nonlinear Optics in Titanium In-Diffused Lithium Niobate Waveguides for Quantum Photonics

Key Points

Implication

Abstract

Discussion

Cite This Study

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