Title: | Thermal tuning of a fixed Bragg grating for IR light fabricated in a LiNbO₃:Ti channel waveguide | Authors: | Hukriede, Joerg Kip, Detlef Krätzig, E. |
Language: | eng | 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 | ISSN: | 0946-2171 | Publisher DOI: | 10.1007/s003400050011 |
Appears in Collections: | 6 - Publication references (without fulltext) of your publications before HSU |
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