Title :
Optimization of coupling a collimated light beam into a single mode fiber by use of GRIN rod lenses
Author :
Yingjun Gao ; Chan, P.K.C. ; Chan, C.C. ; Jin, W. ; Zhou, Y. ; Wang, D.N.
Author_Institution :
Dept. of Electr. Eng., Hong Kong Polytech. Univ., Kowloon, China
Abstract :
Summary form only given. Graded index (GRIN) rod lenses with their refractive index which varies gradually from the center axis to the periphery are widely used. We report a GRIN rod lens system for coupling parallel light beams to a single mode fiber. The system is composed of two pieces of GRIN rod lenses with both their lengths and separation between them optimized. Maximum coupling efficiency is achieved by choosing the lengths and separation so that the beam parameters, i.e., the divergent angle and the focus spot are matched to the numerical aperture and the core diameter of the single mode optical fiber respectively, after passing the coupling system.
Keywords :
gradient index optics; lenses; optical fibre couplers; optical focusing; optimisation; GRIN rod lens system; GRIN rod lenses; beam parameters; collimated light beam; core diameter; coupling system; divergent angle; focus spot; maximum coupling efficiency; numerical aperture; parallel light beam coupling; single mode fiber; single mode optical fiber; Biomedical measurements; Instruments; Lenses; Optical collimators; Optical coupling; Optical fibers; Optical modulation; Optical sensors; Strain measurement; Stress;
Conference_Titel :
Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-662-1
DOI :
10.1109/CLEO.2001.948046
