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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 20,
  • Issue 8,
  • pp. 1545-
  • (2002)

Cascaded GI-Fiber Chips With a Wedge-Shaped End for the Coupling Between an SMF and a High-Power LD With Large Astigmatism

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Abstract

A novel lensed fiber for high-efficiency coupling between an single-mode fiber (SMF) and a high-power laser diode (LD) with large astigmatism of 176 µm is proposed and demonstrated. We experimentally confirmed that the proposed lensed fiber had a minimum coupling loss of 2.5 dB including a reflection loss of 0.3 dB at both ends of the fiber. In addition the new configuration had a long working distance of 67 µm. We also investigated the tolerance characteristics for various displacements.

[IEEE ]

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