Coupling structure of truncated wedge-shaped optical microlens based on DFB laser

JIANG Jinhong; LI Yongqi; LÜ Huanzhu; JIN Qi; ZHANG Kefei

doi:10.7510/jgjs.issn.1001-3806.2019.05.013

LASER TECHNOLOGY > 2019 > 43(5): 655-659. > DOI: 10.7510/jgjs.issn.1001-3806.2019.05.013

JIANG Jinhong, LI Yongqi, LÜ Huanzhu, JIN Qi, ZHANG Kefei. Coupling structure of truncated wedge-shaped optical microlens based on DFB laser[J]. LASER TECHNOLOGY, 2019, 43(5): 655-659. DOI: 10.7510/jgjs.issn.1001-3806.2019.05.013

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Coupling structure of truncated wedge-shaped optical microlens based on DFB laser

1.
School of Science, Southwest University of Science and Technology, Mianyang 621010, China
2.
School of Computer Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China

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Received Date: November 11, 2018
Revised Date: January 02, 2019
Published Date: September 24, 2019

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Abstract

Abstract

In order to overcome the limitation of maximum coupling efficiency in the coupling package of optical emission sub-modules of distributed feedback laser lasers, the wedge-shaped truncated optical fiber microlens was used to replace the discrete lens in direct coupling scheme.A wedge-shaped truncated end-face model with inclined angle of 0.6rad, coupling distance of 60μm and half-width of 15μm was obtained. On this basis, compared with discrete and direct coupling, longitudinal, transverse and angular migration errors were discussed.The results show that, when longitudinal coupling distance is -21.45μm~56.79μm and angular coupling angle ranges from -8.3°~8.5°, the coupling efficiency is always greater than 70%. The overall tolerance of structure is high and the coupling efficiency is 84.40%.This research can provide a new solution of secondary emission module of coupling package device for the next generation distributed feedback lasers.
- optical communication,
- truncated wedge-shaped fiber microlens,
- mismatch tolerance,
- distributed feedback laser,
- direct coupling

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