Tunable dual-wavelength filter and its group delay dispersion in domain-engineered lithium niobate | Zendy

Guang-hao Shao | Zendy; Jing Song | Zendy; Ya-Ping Ruan | Zendy; Guoxin Cui | Zendy; Yanqing Lu | Zendy

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Tunable dual-wavelength filter and its group delay dispersion in domain-engineered lithium niobate

Author(s) -

Guang-hao Shao,

Jing Song,

Ya-Ping Ruan,

Guoxin Cui,

Yanqing Lu

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4972281

Subject(s) - lithium niobate , materials science , optics , wavelength , group delay and phase delay , polarizer , dispersion (optics) , bandwidth (computing) , polarization (electrochemistry) , optical filter , optoelectronics , physics , chemistry , telecommunications , birefringence , computer science

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

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