Abstract
Long-period waveguide grating based filters have attracted attention due to their flexible fabrication, a variety of materials and structures, low back reflection, low insertion loss, and excellent performance in the tuning range and temperature sensitivity. To our knowledge, for the first time, a two-segment polymer long-period waveguide grating was cascaded to implement a filter with a narrower bandwidth. Experimental results showed that the device had a maximum extinction ratio of 24 dB at 1 577 nm, and the 12 dB bandwidth was 10 nm. The temperature sensitivity of the fabricated device was 1.79 nm/°C.
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Shi, X., Cao, R. & Wang, L. Tunable Filters Based on Cascaded Long-Period Polymer Waveguide Gratings. Photonic Sens 12, 220415 (2022). https://doi.org/10.1007/s13320-022-0659-4
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DOI: https://doi.org/10.1007/s13320-022-0659-4