Modeling and experimental verification of backscatter secondary wave of photonic bandgap fiber
Photonic bandgap fibers(PBFs)have advantages that traditional fiber cannot compare for its'unique structural form,transmission medium,and light guide mechanism.PBFs is an ideal choice for fi-ber-optic gyroscope(FOG)in the future.However,the rough inner surface of PBFs'core result in strong backscatter secondary wave,which results in additional non-reciprocal errors of photonic bandgap fi-ber-optic gyroscope(PBFOG).In order to quantitatively analyze the intensity of backscatter secondary wave of PBFs,a simple backscatter secondary wave model of PBFs was established based on electric di-pole radiation theory.Power spectral density of inner surface of PBFs'core was obtained by focused ion beam processing and atomic force microscopy,and the theoretical backscattering coefficient of PBF(HC-1550-02)can be calculated as 2.61×10-9/mm.The measured backscattering coefficient of PBF(HC-1550-02)is～1.82×10-9/mm by optical frequency domain back-reflection scatter instrument,which pri-marily verify the correctness of backscatter secondary wave model,it lays a foundation for the research of suppression technology of backscatter secondary wave.
photonic bandgap fiberbackscatter secondary wavepower spectral density
万方数据
维普
