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A 2*2 fiber optic switch using chiral liquid crystals

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4 Author(s)
Shankar, N.K. ; Sch. of Electr. Eng., Cornell Univ., Ithaca, NY, USA ; Morris, J.A. ; Yakymyshyn, C.P. ; Pollock, C.R.

A nonchemical 2*2 optical switch for fiber optic applications is described. Using a chiral-nematic liquid-crystal cell and switchable nematic liquid-crystal waveplates, the authors measured -26-dB crosstalk between unselected fibers, a fiber-to-fiber insertion losses of 1.4 dB, and switching times under 40 ms with operation at 1318 nm using 62.5/125- mu m multimode fiber. The device features simple construction, low power requirements, and an optical bandwidth suitable for LED or laser sources, and it works equally well with multimode or single-mode fiber.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:2 ,  Issue: 2 )