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Polarization-maintaining optical fibers used for a laser diode redundancy system in a submarine optical repeater

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3 Author(s)
Sasaki, Y. ; NTT Public Corp., Tokai, Ibaraki, Japan ; Hosaka, T. ; Noda, J.

Polarization-maintaining optical fibers are developed for installation in a submarine optical repeater. These fibers preserve the polarization of light emitted from laser diodes (LD's) to a single-mode fiber through a light-switching coupler. Crosstalk of less than -30 dB in a 1-m length of these optical fibers, called PANDA optical fibers, is achieved with a bending radius greater than 10 mm, twists of less than 60 turns, and tension of less than 3 kg, and ambient temperatures of-20-80degC. The mechanical strength of these fibers is the same as that of single-mode fibers.

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Lightwave Technology, Journal of  (Volume:2 ,  Issue: 6 )