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A new lensed-fiber configuration employing cascaded GI-fiber chips

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2 Author(s)
Shiraishi, K. ; Fac. of Eng., Utsunomiya Univ., Japan ; Kuroo, S.-I.

A new scheme is proposed for lensed fibers having high coupling efficiency between laser diodes and single-mode fibers with a long working distance. The new lensed fiber consists of a pair of GI-fiber tips having different focusing parameters. The measured net coupling loss between a laser diode operating at a wavelength of 1.3 /spl mu/m and a single-mode fiber is as low as 1.5 dB. The working distances are around 50 /spl mu/m, much longer than those of conventional lensed fibers.

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Lightwave Technology, Journal of  (Volume:18 ,  Issue: 6 )