We present long period fiber gratings which are constructed of periodic changes in the fiber diameter. Our long period fiber gratings induce strong coupling between the different modes and as such have wider bandwidth and even off-resonance spectral response. We present both calculated and measured results of these long period fiber gratings.
Shir Shahal, Avi Klein, Gilaad Masri, and Moti Fridman, "Off resonance long period fiber gratings for optical detection," Proc. SPIE 10077, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XIV, 100770W (Presented at SPIE BiOS: February 01, 2017; Published: 22 February 2017); https://doi.org/10.1117/12.2249560.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon