Long-period fiber gratings as band-rejection filters

作者：Ashish M. Vengsarkar, P. J. Lemaire, Justin B. Judkins, Vikram Bhatia, T. Erdoğan, J. E. Sipe · 发表于：Journal of Lightwave Technology · 年份：1996 · DOI：10.1109/50.476137 · 被引用次数：1838 · 研究领域：Advanced Fiber Optic Sensors、Photonic and Optical Devices、Advanced Fiber Laser Technologies

We present a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters. Photoinduced periodic structures written in the core of standard communication-grade fibers couple light from the fundamental guided mode to forward propagating cladding modes and act as spectrally selective loss elements with insertion losses act as backreflections <-80 dB, polarization-mode-dispersions <0.01 ps and polarization-dependent-losses <0.02 dB.