CO2 laser annealed SiGe core optical fibers with radial Ge concentration gradients
| Autor: | Mustafa H. Balci, Ursula J. Gibson, Seunghan Song, Wei Wu, Thomas Hawkins, John Ballato, Michael Fokine, Chunxin Liu, Fredrik Laurell |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Optical fiber Annealing (metallurgy) business.industry Physics::Optics 02 engineering and technology Chemical vapor deposition 021001 nanoscience & nanotechnology Laser 01 natural sciences Electronic Optical and Magnetic Materials law.invention 010309 optics Crystal Semiconductor law 0103 physical sciences Optoelectronics Laser power scaling 0210 nano-technology business Refractive index |
| Zdroj: | Optical Materials Express |
| ISSN: | 2159-3930 |
| DOI: | 10.1364/ome.390482 |
| Popis: | CO2 laser annealing of SiGe core, glass-clad optical fibers is a powerful technique for the production of single-crystal cores with spatially varying Ge concentrations. Laser power, laser scan speed and cooling air flow alter the Ge distribution during annealing. In this work, near-single crystal fibers exhibiting a central axial feature with peak Ge concentration ∼15 at% higher than the exterior of the semiconductor core have been prepared. Preferential transmission of near infrared radiation through the Ge-rich region, and spectral data confirm its role as a waveguide within the semiconductor core. This proof-of-concept step toward crystalline double-clad structures is an important advancement in semiconductor core optical fibers made using the scalable molten core method. © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement |
| Databáze: | OpenAIRE |
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