Cryogenic Nonlinear Optics in Titanium In-Diffused Lithium Niobate Waveguides for Quantum Photonics / Nina Amelie Lange. Paderborn, 2026
Inhalt
- List of Abbreviations
- Introduction
- How to get to know your (cryogenic) waveguide
- Theoretical basics - What to know before you start
- Introduction to nonlinear optics
- Titanium in-diffused waveguides in lithium niobate
- Intrinsic material changes at cryogenic temperatures
- Experimental methods
- Cryogenic SPDC in the telecom range
- Experimental methods
- How it began - Proof-of-principle cryogenic SPDC
- SPDC performance metrics
- Spectral properties of signal and idler
- Evaluation of the proof-of-principle measurement series
- Tailoring the process - Cryogenic SPDC for degenerate photon pairs
- Classical characterization of the phase-matching
- Measuring cryogenic SPDC photons
- Evaluation of the degenerate measurement series
- Chapter conclusion
- Widely non-degenerate frequency conversion at cryogenic temperatures
- Experimental methods
- Sum-frequency generation for pump light generation
- Cryogenic waveguiding and phase-matching characterization
- Non-degenerate photons from cryogenic SPDC
- Chapter conclusion
- Cryogenic nonlinear optics: what does it teach us?
- Deeper insights into the cryogenic performance of lithium niobate
- Pyroelectric charge accumulation during the cooldown process
- Photorefractive damage induced at cryogenic temperatures
- Experimental refractive index determination using type-0 SFG
- Studies on the reproducibility of cryogenic performance
- Research questions
- Experimental setup
- Measurement series
- Evaluation of the waveguide performance
- Key factors affecting the cryogenic waveguides
- Chapter conclusion
- Conclusion and Outlook
- Bibliography
- Appendix