Title :
Fringe Visibility Enhanced Extrinsic Fabry–Perot Interferometer Using a Graded Index Fiber Collimator
Author :
Zhang, Yinan ; Li, Yanjun ; Wei, Tao ; Lan, Xinwei ; Huang, Ying ; Chen, Genda ; Xiao, Hai
Author_Institution :
Electr. & Comput. Eng., Missouri Univ. of Sci. & Technol., Rolla, MO, USA
fDate :
6/1/2010 12:00:00 AM
Abstract :
We report a fringe visibility-enhanced extrinsic Fabry-Perot interferometer (EFPI) by fusion splicing a quarter-pitch length of a graded-index fiber (GIF) to the lead-in single mode fiber (SMF). The performance of the GIF collimator is theoretically analyzed using a ray matrix model and experimentally verified through beam divergence angle measurements. The fringe visibility of the GIF-collimated EFPI is measured as a function of the cavity length and compared with that of a regular SMF-EFPI. At the cavity length of 500 m, the fringe visibility of the GIF-EFPI is 0.8, while that of the SMF-EFPI is only 0.2. The visibility-enhanced GIF-EFPI may provide a better signal-to-noise ratio (SNR) for applications where a large dynamic range is desired.
Keywords :
Fabry-Perot interferometers; fibre optic sensors; gradient index optics; optical collimators; optical fibre fabrication; beam divergence angle measurements; fringe visibility enhanced extrinsic Fabry-Perot interferometer; fusion splicing; graded index fiber collimator; lead-in single mode fiber; quarter-pitch length; ray matrix model; Dynamic range; Length measurement; Lenses; Magnetic sensors; Optical collimators; Optical fiber devices; Optical fiber sensors; Optical fibers; Optical interferometry; Optical sensors; Fabry–Perot interferometers; Optical fiber device fabrication; Optical fiber interference; Optical fiber transducers;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2010.2049833
