The coupling efficiency of hollow-core fiber changes with temperature,which leads to the decrease of the finesse(F)of fiber resonator and limits the performance of the resonant fiber optic gyroscope(R-FOG)system.Negat...The coupling efficiency of hollow-core fiber changes with temperature,which leads to the decrease of the finesse(F)of fiber resonator and limits the performance of the resonant fiber optic gyroscope(R-FOG)system.Negative-curvature antiresonant fiber(ARF)can maintain single-mode characteristics under the condition of large mode field diameter,achieve efficient and stable fiber coupling,and significantly improve the consistency of the F of the spatial coupling resonator in variable temperature environment.A new type of ARF with a mode field diameter(MFD)of 25μm is used to fabricate a fiber resonator with a length of 5.14 m.In the range of 25℃-75℃,the average F is 31.45.The ARF resonator is used to construct an R-FOG system that shows long-term bias stability(3600 s)of3.1°/h at room temperature,4.6°/h at 75℃.To our knowledge,this is the best reported index of hollow-core fiber resonator and R-FOG system within the temperature variation range of 50℃ test.展开更多
Continuous operation of fiber gas Raman lasing at the 1135 nm wavelength is experimentally demonstrated with an output power exceeding 26 W.Rotational stimulated Raman scattering(Rot-SRS)is generated in the hydrogen g...Continuous operation of fiber gas Raman lasing at the 1135 nm wavelength is experimentally demonstrated with an output power exceeding 26 W.Rotational stimulated Raman scattering(Rot-SRS)is generated in the hydrogen gas filled 50 m homemade anti-resonant hollow-core fiber(AR-HCF).A single-frequency fiber laser at the 1064 nm wavelength is used as the pump source,and a minimum threshold of 31.5 W is measured where the core diameter of AR-HCF reaches37μm.Up to 40.4%power conversion efficiency of forward Rot-SRS is achieved in the single-pass configuration,corresponding to a quantum efficiency of 43.1%.Over 1 W strong backward Rot-SRS is observed in the experiment,ultimately limiting the further increase of Rot-SRS generation in the forward direction.展开更多
In this paper,a novel all-solid anti-resonant single crystal fiber(AR-SCF)with high refractive index tubes cladding is proposed.By producing the cladding tubes with high refractive index material,the AR guiding mechan...In this paper,a novel all-solid anti-resonant single crystal fiber(AR-SCF)with high refractive index tubes cladding is proposed.By producing the cladding tubes with high refractive index material,the AR guiding mechanism can be realized for the SCF,which can reduce the mode number to achieve single-mode or few-mode transmission.The influences of dif-ferent materials and structures on the confinement loss and effective guided mode number for wavelengths of 2-3μm are investigated.Then,the optimal AR-SCF structures for different wavelengths are determined.Furthermore,the influences of different fabrication errors are analyzed.This work would provide insight to new opportunities in the novel design of SCFs by AR,which would greatly impact the fields of laser application,supercontinum generation,and SCF sensors.展开更多
基金supported by the National Natural Science Foundation of China(61973019)。
文摘The coupling efficiency of hollow-core fiber changes with temperature,which leads to the decrease of the finesse(F)of fiber resonator and limits the performance of the resonant fiber optic gyroscope(R-FOG)system.Negative-curvature antiresonant fiber(ARF)can maintain single-mode characteristics under the condition of large mode field diameter,achieve efficient and stable fiber coupling,and significantly improve the consistency of the F of the spatial coupling resonator in variable temperature environment.A new type of ARF with a mode field diameter(MFD)of 25μm is used to fabricate a fiber resonator with a length of 5.14 m.In the range of 25℃-75℃,the average F is 31.45.The ARF resonator is used to construct an R-FOG system that shows long-term bias stability(3600 s)of3.1°/h at room temperature,4.6°/h at 75℃.To our knowledge,this is the best reported index of hollow-core fiber resonator and R-FOG system within the temperature variation range of 50℃ test.
基金partly supported by the International Science and Technology Cooperation Program(No.2018YFE0115600)National Natural Science Foundation of China(No.61935002)+2 种基金Chinese Academy of Sciences(No.ZDBSLY-JSC020)supported by the CAS Pioneer Hundred Talents ProgramNational Key R&D Program of China(Nos.2020YFB1312802 and 2020YFB1805900)。
文摘Continuous operation of fiber gas Raman lasing at the 1135 nm wavelength is experimentally demonstrated with an output power exceeding 26 W.Rotational stimulated Raman scattering(Rot-SRS)is generated in the hydrogen gas filled 50 m homemade anti-resonant hollow-core fiber(AR-HCF).A single-frequency fiber laser at the 1064 nm wavelength is used as the pump source,and a minimum threshold of 31.5 W is measured where the core diameter of AR-HCF reaches37μm.Up to 40.4%power conversion efficiency of forward Rot-SRS is achieved in the single-pass configuration,corresponding to a quantum efficiency of 43.1%.Over 1 W strong backward Rot-SRS is observed in the experiment,ultimately limiting the further increase of Rot-SRS generation in the forward direction.
基金This work was supported in part by the Fundamental Research Funds for the Central Universities(No.2019JBM345)in part by the Beijing Natural Science Foundation(No.4192047)in part by the National Natural Science Foundation of China(Grant No.61875064).
文摘In this paper,a novel all-solid anti-resonant single crystal fiber(AR-SCF)with high refractive index tubes cladding is proposed.By producing the cladding tubes with high refractive index material,the AR guiding mechanism can be realized for the SCF,which can reduce the mode number to achieve single-mode or few-mode transmission.The influences of dif-ferent materials and structures on the confinement loss and effective guided mode number for wavelengths of 2-3μm are investigated.Then,the optimal AR-SCF structures for different wavelengths are determined.Furthermore,the influences of different fabrication errors are analyzed.This work would provide insight to new opportunities in the novel design of SCFs by AR,which would greatly impact the fields of laser application,supercontinum generation,and SCF sensors.
