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A compact-size D lens collimator for fiber coupling

YU-CHENG LIN1, WEI-CHING CHUANG2,* , CHIEN-JANG WU3, WEI-CHIH WANG4

Affiliation

  1. Department of Electrical Engineer, Ming Chung University, addr:5 The-Ming Rd., Gwei-shen, Taoyuan 333, Taiwan
  2. Department of Electro-Optics Engineering, National Formosa University, Huwei 632, Taiwan
  3. Department of Applied Physics, National University of Kaohsiung, Kaohsiung 811, Taiwan
  4. Department of Mechanical Engineering and Department of Electrical Engineering, University of Washington, Seattle, Washington, U.S.A.

Abstract

The paper presents a low cost and easy to fabricate compact D lens fiber optic collimator. Both the theoretical and experimental results are presented. The beam diameter and insertion loss of the lens are theoretically analyzed by using the ABCD matrix and the overlap integral methods. The experiment results show that the smallest beam diameter is found to be in the range of 380 to 400 μm as the output distance varies from 10 to 30 mm. The insertion loss of the collimator is shown to be less than 0.3 dB. This number is slightly less than the value obtained by a conventional GRIN lens of similar dimensions for 10 to 30 mm output distance operated at λ = 1550 nm..

Keywords

D lens collimator, Fiber coupling, ABCD method.

Submitted at: Oct. 10, 2006
Accepted at: Aug. 18, 2007

Citation

YU-CHENG LIN, WEI-CHING CHUANG, CHIEN-JANG WU, WEI-CHIH WANG, A compact-size D lens collimator for fiber coupling, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 8, pp. 2371-2375 (2007)