Journal article
Upconversion spectral response tailoring using fanout QPM structures
Department of Photonics Engineering, Technical University of Denmark1
Optofluidics, Nano and Bio-physical Systems, Department of Health Technology, Technical University of Denmark2
Department of Health Technology, Technical University of Denmark3
Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik4
Optical Sensor Technology, Department of Photonics Engineering, Technical University of Denmark5
In this Letter, a novel technique for independent control of the phase-matched center wavelength and bandwidth (BW) is demonstrated for upconversion detection in the 2–4 μm range using a fanout lithium niobate (LN) crystal. A compact, all-semiconductor, 975 nm laser delivering 3.5 W of power is used as the pump in a single-pass upconversion configuration.
A globar (∼800°C) is used as the infrared test source. Continuous tuning of the detected wavelength (λc:2.5–3.0 μm) and BW (ΔλIR:35–225 nm) has been realized using mechanical translation and rotation, respectively, of the fanout LN crystal. A comparison between the performance of the fanout LN and a conventional periodically poled LN crystal is made.
The upconverted light is detected using a commercial silicon-spectrometer. The demonstrated technique allows tailored spectral upconversion based on collinear interaction. Numerical simulations are made to complement the experimental results.
| Language: | English |
|---|---|
| Year: | 2019 |
| Pages: | 2847-2850 |
| ISSN: | 15394794 and 01469592 |
| Types: | Journal article |
| DOI: | 10.1364/OL.44.002847 |
| ORCIDs: | Barh, Ajanta , Tawfieq, Mahmoud , 0000-0001-5044-955X , Pedersen, Christian and Tidemand-Lichtenberg, Peter |
