Optical Coupling Method Utilizing a Lensed Fiber Integrated With a Long-Period Fiber Grating
Resource
Applied Optics 39 (25): 4490-4500
Journal
Applied Optics
Journal Volume
39
Journal Issue
25
Pages
4490-4500
Date Issued
2000
Date
2000
Author(s)
Chen, Wen Tzung
Abstract
A novel optical coupling scheme that uses a lensed fiber integrated with a long-period fiber grating (LPFG) is proposed. Two experiments are performed to demonstrate the validity of such a scheme in single-mode-fiber-single-mode-fiber (SMF-to-SMF) and laser-diode-single-mode-fiber (LD-to-SMF) coupling setups. The measured results show that for an appropriate lens radius the addition of a LPFG will lead to a higher coupling efficiency over a longer range of working distance than without the LPFG. Coupling efficiencies of ∼78% and 35% are achieved for corresponding working distances of ∼250 and 110 mm, 1-dB longitudinal tolerances of ∼40 and 26 μm, and 1-dB transverse tolerances of ∼7.6 and 2.6 mm for SMF-to-SMF and LD-to-SMF, respectively. © 2000 Optical Society of America.
Other Subjects
Optical instrument lenses; Semiconductor lasers; Single mode fibers; Optical couplings; Fiber Bragg gratings
Type
journal article
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