Quantum sensing with integrated waveguides for ultra-fast spectroscopy in the mid infra-red / vorgelegt von Franz Hartmut Roeder ; Erstgutachter: Prof. Dr. Christine Silberhorn, Zweitgutachter: Prof. Dr. Thomas Zentgraf, Vertreter des Mittelbaus: Dr. Frederik Thiele, Vorsitzender der Prüfungskommission: Prof. Dr. Wolf Gero Schmidt. Paderborn, 2025
Inhalt
- Erklärung der Selbstständigkeit
- Summary
- Zusammenfassung
- List of publications
- List of abbreviations
- 1 Introduction
- 2 Fundamentals
- 2.1 Methods in ultra-fast (quantum) spectroscopy
- 2.2 Waveguides
- 2.3 Dispersive effects on ultrashort pulses in waveguides
- 2.4 Nonlinear optics
- 2.5 Parametric down-conversion
- 2.6 Nonlinear interferometers
- 3 Source engineering
- 3.1 Dispersion engineering
- 3.2 Simulations
- 3.3 Waveguide and poling designs
- 3.4 MIR source characterisation
- 4 Nonlinear interferometers in the near infra-red
- 4.1 Experimental setups
- 4.1.1 SU(1,1) interferometer with differential pumping
- 4.1.2 SU(1,1) interferometer with single-sided pumping
- 4.1.3 Induced coherence interferometer
- 4.1.4 Measurement techniques
- 4.2 Correlation time measurements
- 4.3 Optimising optical coherence tomography
- 5 Nonlinear interferometer in the mid infra-red
- 5.1 Experimental setup
- 5.2 Temporal and spectral interferograms
- 5.3 Application: MIR absorption spectroscopy with undetected photons
- 6 Conclusion and Outlook
- A Appendix
- A.1 Time-bandwidth product of common pulse shapes
- A.2 Waveguide and poling masks
- A.3 Pump gain optimization in induced coherence
- A.4 Reference UVFS glass transmission
- B Acknowledgements
- Bibliography