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Low-loss highly overcoupled fused couplers: fabrication and sensitivity to external pressure

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4 Author(s)
Bilodeau, F. ; Dept. of Commun., Commun. Res. Center, Ottawa, Ont., Canada ; Hill, K.O. ; Faucher, S. ; Johnson, D.C.

A flame brush technique for fabrication of optical directional couplers that maintain low loss over many coupling cycles is discussed. Couplers with excess losses less than 3% and with 2500 power transfer cycles in the coupling are reported. Such couplers, which have a narrow wavelength band transmission (0.12 nm), can be tuned by applying an external hydrostatic pressure. The long fused couplers can also have application as optical fiber sensors

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Lightwave Technology, Journal of  (Volume:6 ,  Issue: 10 )