6533b7d5fe1ef96bd12648d4
RESEARCH PRODUCT
Measurement of Pockels’ coefficients and demonstration of the anisotropy of the elasto-optic effect in optical fibers under axial strain
Martina Delgado-pinarXavier Roselló-mechóAntonio DiezMiguel V. Andréssubject
Optical fiberMaterials sciencebusiness.industry02 engineering and technology01 natural sciencesAtomic and Molecular Physics and OpticsPockels effectlaw.invention010309 opticsWavelength020210 optoelectronics & photonicsOpticsFiber Bragg gratinglaw0103 physical sciencesDispersion (optics)0202 electrical engineering electronic engineering information engineeringWhispering-gallery wavebusinessAnisotropyRefractive indexdescription
The elasto-optic effect in optical fibers under axial strain can be characterized by means of the whispering gallery mode (WGM) resonances of the fiber itself. This technique enables a direct measurement of the anisotropy, the determination of the individual Pockels' coefficients, and the study of the wavelength dependence. The method is based on a rigorous theoretical study of WGM resonances in cylindrical microresonators. The shift of the WGM resonances as a function of strain was measured for the TE and TM modes, showing a strong modal anisotropy. In particular, the shift rate for TE modes was 1.84 times the one for TM modes. From these measurements, experimental values for the Pockels' coefficients were obtained: psub11/sub=0.116 and psub12/sub=0.255 at 1531 nm, and psub11/sub=0.131 and psub12/sub=0.267 at 1064 nm. The dispersion of psub44/subwith wavelength was shown to be 5% μmsup-1/sup.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-07-02 | Optics Letters |