29 August 2002 Cylindrical lensed fibers optimized for 980-nm pump laser diode coupling
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Proceedings Volume 4905, Materials and Devices for Optical and Wireless Communications; (2002) https://doi.org/10.1117/12.480998
Event: Asia-Pacific Optical and Wireless Communications 2002, 2002, Shanghai, China
Abstract
A theoretical model is presented to calculate the fiber coupling efficiency and alignment tolerances for the case of a 980nm pump laser diode directly coupled to a round-shaped cylindrical lensed fiber (CLF). Both radius and wedge angle of the round-shaped cylindrical lens are optimized for maximal coupling efficiency. It is found that with proper design, a coupling efficiency up to 98% may be obtained theoretically. The alignment tolerances for all three directions (vertical, horizontal and axial offsets) are also calculated, and found that the vertical offset tolerance is critical and presents the biggest challenge in packaging. In addition, it is also found that both LD-to-CLF distance and lens shape affect the vertical offset tolerance, and can be varied to improve this tolerance.
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Haiqing Tang, Haiqing Tang, Quan J. Zhang, Quan J. Zhang, Faying Zhao, Faying Zhao, Hao Xue, Hao Xue, } "Cylindrical lensed fibers optimized for 980-nm pump laser diode coupling", Proc. SPIE 4905, Materials and Devices for Optical and Wireless Communications, (29 August 2002); doi: 10.1117/12.480998; https://doi.org/10.1117/12.480998
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