In present communication, doubly tuned Bragg fiber waveguide low power inline optical filter with voltage tunable single crystal PMMA defect cavity is theoretically modeled and discussed using Henkel formalism in a cylindrical coordinate system for multiwavelength LASER applications. The structure provides photonic band gap (PBG) with a resonant transmission peak in the obtained PBG region. The defect cavity thickness is controlled by applying an external electric DC voltage. Initially, PBG of the proposed inline optical filter may tune-up to 828nm by modulating the incidence angle upto 80°. Thus, the resonant transmission peak also blue-shifted by 243nm, which can further tuned in presence of DC voltages and so-called doubly electrically tuned. Further, in doubly electrically tuned mode, the application range of such a device is very large up to 129nm for a small change in voltage range about 20V. Thus, the present device can be utilized as multiwavelength laser sources.

在当前的通信中，理论上对带有电压可调单晶PMMA缺陷腔的双调谐布拉格光纤波导低功率在线滤光器进行了建模，并在多波长LASER应用的圆柱坐标系中使用汉高形式学进行了讨论。该结构在获得的PBG区域中为光子带隙（PBG）提供了一个共振传输峰。通过施加外部直流电压来控制缺陷腔的厚度。最初，建议的在线滤光片的PBG可以通过将入射角调制到80°调整到828 nm。因此，共振透射峰也蓝移了243 nm可以在存在直流电压的情况下进一步进行调谐，也就是所谓的双电调谐。此外，在双电调谐模式下，对于约20 V的电压范围的微小变化，这种器件的应用范围非常大，最高可达129 nm。因此，本装置可以用作多波长激光源。