Temperature effects in proton exchanged LiNbO3 waveguides

Temperature effects in proton exchanged LiNbO3 waveguides

Temperature effects on single, homogeneous phases of proton exchanged LiNbO3 waveguides have been studied. The refractive index of {/content/9FTHF24D7UV8WLYT/xxlarge945.gif}-phase guides on z-cut and x-cut congruent substrates monotonically increases with temperature, the thermo-optical coefficient...

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Veröffentlicht in:Applied physics. B, Lasers and optics Lasers and optics, 2004-11, Vol.79 (7), p.845-849
Hauptverfasser: V, A. Alcazarde, RAMIRO, B, RAMS, J, ALONSO, B, ROJO, G, BERMUDEZ, V, CABRERA, J. M
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Circuit properties
Coefficients
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Exchanging
Fundamental areas of phenomenology (including applications)
Integrated optics. Optical fibers and wave guides
Lasers
Nonlinear optical crystals
Optical and optoelectronic circuits
Optical materials
Optics
Origins
Phases
Physics
Refractive index
Refractivity
Waveguides
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Zusammenfassung:Temperature effects on single, homogeneous phases of proton exchanged LiNbO3 waveguides have been studied. The refractive index of {/content/9FTHF24D7UV8WLYT/xxlarge945.gif}-phase guides on z-cut and x-cut congruent substrates monotonically increases with temperature, the thermo-optical coefficient being similar to that of the substrate. In {/content/9FTHF24D7UV8WLYT/xxlarge954.gif}2-phases on z-cut congruent substrates and in {/content/9FTHF24D7UV8WLYT/xxlarge946.gif}1-phases on z-cut and x-cut congruent and quasi-stoichiometric substrates, the thermo-optical coefficient is smaller than that of the substrate below {/content/9FTHF24D7UV8WLYT/xxlarge8764.gif}60 C and higher above this temperature. A rather similar effect has been observed in {/content/9FTHF24D7UV8WLYT/xxlarge946.gif}1-phases on z-cut and x-cut congruent substrates in the linear expansion coefficient. The microscopic origin of the phase transition is not known for the moment.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-004-1646-8