Investigation of PPLN Waveguide Uniformity via Second Harmonic Generation Spectra
| Autor: | Lewis G. Carpenter, Alan C. Gray, Pete Smith, Sam A. Berry, James C. Gates, Corin B. E. Gawith |
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| Rok vydání: | 2020 |
| Předmět: |
White light interferometry
Materials science business.industry Lithium niobate Physics::Optics Second-harmonic generation Nonlinear optics 02 engineering and technology Waveguide (optics) Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Optical pumping Harmonic spectrum chemistry.chemical_compound 020210 optoelectronics & photonics Optics chemistry 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Propagation constant business |
| Zdroj: | IEEE Photonics Technology Letters. 32:63-66 |
| ISSN: | 1941-0174 1041-1135 |
| Popis: | Experimental data collection methods and a corresponding numerical model are presented to investigate the quality of waveguide fabrication in nonlinear optics. The method utilises white light interferometry and standard image recognition techniques to calculate a waveguide propagation constant function. This enables comparison of a numerical second harmonic spectrum in quasi-phasematched materials, such as periodically poled lithium niobate, with the waveguide’s experimental phase-matching spectrum. Using the presented method, a 3rd order polynomial fit to waveguide ridge width is demonstrated to be in good agreement with experimental phasematching spectra. The presented technique provides a nondestructive route to discriminate between issues in fabrication steps in nonlinear waveguide design. |
| Databáze: | OpenAIRE |
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