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All-fiber polarization interference filters based on 45 deg-tilted fiber gratings

机译:基于45度倾斜光纤光栅的全光纤偏振干涉滤光片

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摘要

We report all-fiber polarization interference filters, known as Lyot and Lyot-Ohman filters, based on alternative concatenation of UV-inscribed fiber gratings with structure tilted at 45 deg and polarization maintaining (PM) fiber cavities. Such filters generate comb-like transmission of linear polarization output. The free spectral range (FSR) of a single-stage (Lyot) filter is PM fiber cavity length dependent, as a 20 cm long cavity showed a 26.6 nm FSR while the 40 cm one exhibited a 14.8 nm FSR. Furthermore, we have theoretically and experimentally demonstrated all-fiber 2-stage and 3-stage Lyot-Ohman filters, giving more freedom in tailoring the transmission characteristics.
机译:我们报告了全光纤偏振干涉滤光片,称为Lyot和Lyot-Ohman滤光片,基于具有45度倾斜结构和偏振保持(PM)光纤腔的UV内接光纤光栅的交替连接。这样的滤波器产生线性偏振输出的梳状传输。单级(Lyot)滤光片的自由光谱范围(FSR)与PM光纤腔长度有关,因为20 cm长的腔显示26.6 nm FSR,而40 cm腔显示14.8 nm FSR。此外,我们在理论上和实验上都演示了全光纤2级和3级Lyot-Ohman滤波器,为定制传输特性提供了更大的自由度。

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