Design of fiber array collimator and measurement of its divergence angle

被引：1
|
作者：
Liu R. [1 ,3 ]
Zhao S. [2 ,3 ]
Gu Y. [2 ,3 ]
Xie R. [2 ]
Zhao M. [2 ,3 ]
机构：
[1] School of Mechanical Engineering, Dalian University of Technology, Dalian
[2] School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian
[3] Key Laboratory of Advanced Optoelectronic Technology of Liaoning Province, Dalian
来源：
Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2023年 / 31卷 / 01期
关键词：
far-field divergence an⁃ gle; fiber array collimator; microlens array; optical fiber communication; uncertainty analysis;
D O I：
10.37188/OPE.20233101.0089
中图分类号：
学科分类号：
摘要：
The optical fiber array collimator is a major component in optical fiber communication systems，and its development is gradually moving toward array and integration. The traditional method of construct⁃ ing a fiber array collimator is based on single-fixed and graded index lenses. It has disadvantages，such as difficulties in integrating and expanding the number of array elements and a complex packaging process. In this paper，a method of fabricating a fiber array collimator based on a plano-convex microlens array is pro⁃ posed. The method utilizes the advantages of easy arraying of optical microlenses and good uniformity of array element characteristics. The theories of Gaussian and matrix optics were applied to analyze and simu⁃ late the collimation characteristics and determine the relevant design parameters of the fiber array collima⁃ tor. A fiber array collimator with an array pitch of 250 μm is fabricated in this study. The far-field diver⁃ gence angle is the main performance parameter measured using the far-field spot method. The measure⁃ ment uncertainty is analyzed and evaluated using the Monte Carlo method. The measured values of far-field divergence angles of each channel in the fiber array collimator are 0. 69°，0. 67°，0. 71°，and 0. 68°，re⁃ spectively，and the measurement expansion uncertainty is 0. 02°，which is within the design tolerance limit of（0. 68±0. 03）°. The optical fiber collimator has good collimation characteristics and can meet the re⁃ quirements of miniaturization and integration in the field of optical communication. © 2023 Chinese Academy of Sciences. All rights reserved.
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页码：89 / 98
页数：9
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