Title :
Ultrasensitive measurement method for refractive index difference between two wavelengths
Author :
Legre, M. ; Wegmuller, M. ; Gisin, N.
Author_Institution :
Group of Applied Physics, University of Geneva, 20 rue de l´Ecole-de- Medecine, CH-1205 Geneve, Switzerland
Abstract :
A novel method for the measurement of ultra small refractive index differences between two wavelengths is demonstrated. The method is based on the change of the phase matching conditions of a nonlinear process in two nonlinear crystals separated by a dispersive medium. We demonstrate the performance of our technique by measuring the refractive index difference of air between 775nm and l550nm with an air column of only 33cm.
Keywords :
Dispersion; Frequency conversion; Nonlinear equations; Nonlinear optics; Optical frequency conversion; Optical harmonic generation; Optical pumping; Photonic crystals; Refractive index; Wavelength measurement;
Conference_Titel :
Optical Fiber Measurements, 2004. Technical Digest: Symposium on
Conference_Location :
Boulder, CO, USA
Print_ISBN :
1-886843-37-6
DOI :
10.1109/SOFM.2004.183472
