1. Tunable dual-wavelength filter and its group delay dispersion in domain-engineered lithium niobate
- Author
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Yan-qing Lu, Guo-xin Cui, Ya-ping Ruan, Guang-hao Shao, and Jing Song
- Subjects
Optical frequency multiplier ,Materials science ,Lithium niobate ,Physics::Optics ,General Physics and Astronomy ,02 engineering and technology ,01 natural sciences ,law.invention ,010309 optics ,chemistry.chemical_compound ,Optics ,law ,0103 physical sciences ,Group delay dispersion ,Optical rotation ,Optical filter ,business.industry ,Polarizer ,021001 nanoscience & nanotechnology ,Polarization (waves) ,lcsh:QC1-999 ,Wavelength ,chemistry ,0210 nano-technology ,business ,lcsh:Physics - Abstract
A tunable dual-wavelength filter is experimentally demonstrated in domain-engineered lithium niobate. Application of an electric field on the y-surfaces of the sample results in the optical axes rotating clockwise and anticlockwise, which makes selective polarization rotation. The quasi phase-matching wavelengths could be adjusted through suitable domain design. A unique dual valley spectrum is obtained in a periodically poled lithium niobate structure with a central defect if the sample is placed between two parallel polarizers. The expected bandwidth could be varied from ∼1 nm to ∼40 nm. Moreover, both the spectral response and group delay dispersion could be engineered.
- Published
- 2016
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