Tilted fiber Bragg gratings(TFBGs) have seen rapid development and widespread deployment in diverse sensing applications, ranging from biochemical detection to in-situ monitoring in energy systems. Their ability to ge...Tilted fiber Bragg gratings(TFBGs) have seen rapid development and widespread deployment in diverse sensing applications, ranging from biochemical detection to in-situ monitoring in energy systems. Their ability to generate rich spectral features via cladding mode coupling enables highly sensitive, multi-parameter, and label-free sensing.However, accurate interrogation typically requires broadband spectral measurements to resolve fine spectral structures-posing significant challenges for scalable and cost-effective multiplexing in practical settings.展开更多
This paper presents an investigation of specific optical fiber core mode leakage behavior that occurs in high-power double-clad fiber lasers as a result of thermally-induced refractive index variations. A model of the...This paper presents an investigation of specific optical fiber core mode leakage behavior that occurs in high-power double-clad fiber lasers as a result of thermally-induced refractive index variations. A model of the power transfer between the core modes and the cladding modes during thermally-induced refractive index variations is established based on the mode coupling theory. The results of numerical simulations based on actual laser parameters are presented. Experimental measurements were also carried out, the results showed good agreement with the corresponding simulation results.展开更多
文摘Tilted fiber Bragg gratings(TFBGs) have seen rapid development and widespread deployment in diverse sensing applications, ranging from biochemical detection to in-situ monitoring in energy systems. Their ability to generate rich spectral features via cladding mode coupling enables highly sensitive, multi-parameter, and label-free sensing.However, accurate interrogation typically requires broadband spectral measurements to resolve fine spectral structures-posing significant challenges for scalable and cost-effective multiplexing in practical settings.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61307057 and 61675114)
文摘This paper presents an investigation of specific optical fiber core mode leakage behavior that occurs in high-power double-clad fiber lasers as a result of thermally-induced refractive index variations. A model of the power transfer between the core modes and the cladding modes during thermally-induced refractive index variations is established based on the mode coupling theory. The results of numerical simulations based on actual laser parameters are presented. Experimental measurements were also carried out, the results showed good agreement with the corresponding simulation results.
