|Title:||Thermal tuning of a fixed Bragg grating for IR light fabricated in a LiNbO₃:Ti channel waveguide||Authors:||Hukriede, Joerg
|Language:||en||Subject (DDC):||DDC::500 Naturwissenschaften und Mathematik||Issue Date:||2000||Publisher:||Springer||Document Type:||Article||Journal / Series / Working Paper (HSU):||Applied Physics B Lasers and optics||Volume:||70||Page Start:||73||Page End:||75||Publisher Place:||Berlin, Heidelberg||Abstract:||
We investigate a thermally tunable integrated narrow-bandwidth interference filter for light in the infrared wavelength region around γ = 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 α33 = (4.5 ± 0.5) × 10-6 K-1 is obtained. Permanent illumination of the filter with incoherent light allows us to adjust the peak reflectivity.
|Organization Units (connected with the publication):||Universität Osnabrück||URL:||https://api.elsevier.com/content/abstract/scopus_id/0012087618||ISSN:||09462171||DOI:||10.1007/s003400050011|
|Appears in Collections:||Publications of the HSU Researchers (before HSU)|
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