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An optimized all-fiber edge filter is developed, based on a one-turn macrobending bare fiber structure. The discrimination range (DR) is 16.32 dB over a wavelength range from 1500 to 1600 nm, which can be employed for wavelength measurement applications. It offers a simpler structure compared to the previously developed macrobending fiber loss edge filters, without an increase in the polarization dependent loss (PDL).
Wang, P., Farrell, G., Wang, Q., Rajan., G. (2007) An optimized macrobending fiber based edge filter. IEEE Photonics Technology Letters, Vol. 19, No. 15, pp. 1136-1138, 2007. doi:10.1109/LPT.2007.901434