Title :
Measurement of He-Ne laser linewidth apparent broadening using a Mach-Zehnder interferometer in vacuum chamber
Author :
Galdieri, Flavio Jose ; Melnikoff, Nikolai ; Conforti, Evandro
Author_Institution :
Dep. of Microwave & Opt., State Univ. of Campinas, Brazil
Abstract :
Measurements of laser spectrum from millihertz up to kilohertz and its linewidth were obtained with an optical fiber Mach-Zehnder interferometer using a self-homodyne detection method and a vacuum chamber. Apparent degradation of the He-Ne laser linewidth was observed with the air pressure increase, and is probably due to external acousto-optic effects on the optical fiber that introduce phase noise on the interferometer.
Keywords :
Mach-Zehnder interferometers; acousto-optical effects; fibre optic sensors; gas lasers; helium; homodyne detection; laser variables measurement; light interferometry; neon; optical fibres; phase noise; spectral line broadening; He-Ne; He-Ne laser; acousto-optic effects; laser linewidth apparent broadening; laser spectrum measurements; optical fiber Mach-Zehnder interferometer; phase noise; self-homodyne detection method; vacuum chamber; Acoustic measurements; Coherence; Fiber lasers; Laser modes; Laser noise; Laser theory; Noise measurement; Optical fibers; Optical interferometry; Phase noise;
Conference_Titel :
Microwave and Optoelectronics, 2005 SBMO/IEEE MTT-S International Conference on
Print_ISBN :
0-7803-9341-4
DOI :
10.1109/IMOC.2005.1580086
