Fringe Visibility Enhanced Extrinsic Fabry–Perot Interferometer Using a Graded Index Fiber Collimator

IEEE Photonics Journal

Hai Xiao¹  Xinwei Lan¹  Ying Huang²  Yinan Zhang³  Yanjun Li⁴  Tao Wei⁵  Genda Chen⁵ 

[1] Comput. Eng., Missouri Univ. of Sci. &Technol., Rolla, MO, USA;$^{1}$Electrical and Computer Engineering, Missouri University of Science and Technology, Rolla, MO, USA;$^{2}$College of Electrical Engineering, Henan University of Technology, Zhengzhou City, China;;Electr. &

关键词: Fabry–;    Perot interferometers;    Optical fiber transducers;    Optical fiber device fabrication;    Optical fiber interference;   

DOI  :  10.1109/JPHOT.2010.2049833

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown