Polarization-independent broadband dielectric bilayer gratings for spectral beam combining system
| Autor: | Junming Chen, Leilei Wang, Jianda Shao, Quan Liu, Yunxia Jin, Yifeng Yang, Linxin Li |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Holographic grating business.industry Bilayer 02 engineering and technology Grating 021001 nanoscience & nanotechnology Diffraction efficiency 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 010309 optics Ultrasonic grating Optics law 0103 physical sciences Blazed grating Optoelectronics Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology business Diffraction grating Beam (structure) |
| Zdroj: | Optics Communications. 385:97-103 |
| ISSN: | 0030-4018 |
| Popis: | We report on a polarization-independent all-dielectric trapezoidal bilayer grating with broadband and high diffraction efficiency. The bilayer trapezoidal grating ridge on a reflector consists of an HfO2 layer and a SiO2 layer. The theoretical −1st order efficiencies of the grating are more than 95% with wavelength range from 1010 nm to 1080 nm for both TE and TM polarizations. The fabrication tolerances depending on the HfO2 and SiO2 layer grating ridge depths are enough to obtain the designed grating using current craft. The fabricated grating with exceeding 94% efficiency from 1000 nm to 1085 nm measured by a non-polarization laser has been fabricated and applied in a spectral beam combining external cavity to combine eight beams into one beam output with 10.77 kW. |
| Databáze: | OpenAIRE |
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