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提出了基于光纤Bragg 光栅滤波器的全光纤波分复用传输系统模型。通过紫外光写入的方式, 在普通单模光纤上制备了光纤光栅。典型的光纤Bragg 光栅滤波器在1.56 μm 波段的反射率达99% , 带宽0.6 nm 。首次建立了全光纤波分复用传输实验系统。该系统以掺铒光纤激光器为光源, 其工作波长稳定度优于0.05 dB。全光纤型波分复用器由1 个1×4 光纤耦合器和4 个光纤Bragg 光栅滤波器构成, 信道波长间隔3.2 nm (0.8 nm ×4), 插入损耗小于7.5 dB, 串扰小于- 28 dB
An all-optical wavelength division multiplexing transmission system model based on fiber Bragg grating filter is proposed. By means of UV light writing, a fiber grating is prepared on an ordinary single-mode fiber. A typical fiber Bragg grating filter has a reflectivity of 99% and a bandwidth of 0.6 nm in the 1.56 μm band. For the first time established all-fiber WDM transmission experimental system. The system uses erbium-doped fiber laser as the light source, and its working wavelength stability is better than 0.05 dB. The all-fiber wavelength division multiplexer consists of a 1 × 4 fiber coupler and 4 fiber Bragg grating filters with channel wavelengths of 3.2 nm (0.8 nm × 4), insertion loss of less than 7.5 dB, and crosstalk of less than -28 dB