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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: An optimized macrobending fiber based edge filter. IEEE Photonics Technology Letters, Vol. 19, No. 15, pp. 1136-1138, 2007.