A compact-size D lens collimator for fiber coupling

Yu Cheng Lin, Wei Ching Chuang*, Chien Jang Wu, Wei Chih Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


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 400μm 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.

Original languageEnglish
Pages (from-to)2371-2375
Number of pages5
JournalJournal of Optoelectronics and Advanced Materials
Issue number8
Publication statusPublished - 2007 Aug
Externally publishedYes


  • ABCD method
  • D lens collimator
  • Fiber coupling

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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