Microlens fabrication on single-mode fibres for efficient coupling from laser diodes |
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| Authors: | A. Kotsas H. Ghafouri-Shiraz T. S. M. Maclean |
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| Affiliation: | (1) School of Electronic and Electrical Engineering, The University of Birmingham, P.O. Box 363, B15 2TT Birmingham, UK |
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| Abstract: | An analysis of the etching process for forming a truncated conical microlens on the end surface of a single-mode fibre (SMF) so as to improve its coupling efficiency with a laser diode (LD) has been carried out. This is followed by a simple geometric-optics and electromagnetic analysis to calculate this coupling efficiency, when the lens is formed on a SMF fabricated by the MCVD technique. The theory is supported by measurements which gave a maximum coupling efficiency of 57%. |
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