Title :
Improved Precision Measurement of Refractive Indices of Gases Using Frequency Comb
Author :
Zhang, J. ; Lu, Z.H. ; Wang, L.J.
Author_Institution :
Univ. Erlangen-Nuremberg, Erlangen
fDate :
May 29 2007-June 1 2007
Abstract :
We report improved precision measurement of the refractive index of air and CO2 using a highly unbalanced Mach-Zehnder interferometer with a frequency comb as the light source. The deviation of our experimental results with Edlen´s formula is 1.4times10-9 at 800 nm. Our experiment has a standard error of 5.2times10-9 at fixed parameters (pressure and temperature). The result for CO2 shows a bigger deviation with earlier results of Old et al. by 4.78times10-6 at 800 nm.
Keywords :
Mach-Zehnder interferometers; carbon compounds; refractive index measurement; CO2; Edlen´s formula; frequency comb; highly unbalanced Mach-Zehnder interferometer; improved precision measurement; refractive air indices; Frequency domain analysis; Frequency measurement; Gas lasers; Gases; Laser beams; Optical interferometry; Optical refraction; Optical variables control; Pollution measurement; Ultrafast optics;
Conference_Titel :
Frequency Control Symposium, 2007 Joint with the 21st European Frequency and Time Forum. IEEE International
Conference_Location :
Geneva
Print_ISBN :
978-1-4244-0646-3
Electronic_ISBN :
1075-6787
DOI :
10.1109/FREQ.2007.4319040
