Low-loss highly overcoupled fused couplers: fabrication andsensitivity to external pressure |
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Authors: | Bilodeau F. Hill K.O. Faucher S. Johnson D.C. |
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Affiliation: | Dept. of Commun., Commun. Res. Center, Ottawa, Ont.; |
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Abstract: | 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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