Thermal tuning of a fixed Bragg grating for IR light fabricated in a LiNbO3 : Ti channel waveguide

Autor(en): Hukriede, J
Kip, D
Kratzig, E
Stichwörter: Optics; Physics; Physics, Applied; PROFILES; WAVE-GUIDES
Erscheinungsdatum: 2000
Herausgeber: SPRINGER VERLAG
Journal: APPLIED PHYSICS B-LASERS AND OPTICS
Volumen: 70
Ausgabe: 1
Startseite: 73
Seitenende: 75
Zusammenfassung: 
We investigate a thermally tunable integrated narrow-bandwidth interference filter for light in the infrared wavelength region around lambda = 1550 nm fabricated in a channel waveguide in lithium niobate, The filter is based on a holographically recorded and thermally fixed refractive-index Bragg grating. The device is connected to optical single-mode fibers and works polarization-independent. We measure a peak reflectivity of 95% and a linewidth (FWHM) of 0.09 nm, By temperature-controlling the peak wavelength of the filter is tuned, For the linear thermal expansion coefficient of lithium niobate along the c axis the value alpha 33 = (4.5 /- 0.5) x 10(-6) K-1 is obtained, Permanent illumination of the filter with incoherent light allows us to adjust the peak reflectivity.
ISSN: 09462171
DOI: 10.1007/s003400050011

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