In this paper, we present a mode-selective coupler based on a dual-core all-solid photonic bandgap fiber（AS-PBGF）. Because they are all-solid, AS-PBGF-based mode converters are easier to splice to other fibers than ...In this paper, we present a mode-selective coupler based on a dual-core all-solid photonic bandgap fiber（AS-PBGF）. Because they are all-solid, AS-PBGF-based mode converters are easier to splice to other fibers than those based on air-hole photonic crystal fibers. Mode conversions between the LP01 and LP11modes, LP01 and LP21modes, and LP01 and LP02modes are obtained at the wavelength λ=1550 nm. The 3 dB wavelength bandwidth of these mode converters are 47.8,20.3, and 20.3 nm, respectively.展开更多
A large-mode-area neodymium-doped silicate photonic bandgap fiber was theoretically designed and experimen- tMly demonstrated. The relative index step between the high-index rods and the background glass was -0.5%, wh...A large-mode-area neodymium-doped silicate photonic bandgap fiber was theoretically designed and experimen- tMly demonstrated. The relative index step between the high-index rods and the background glass was -0.5%, which is the lowest cladding index difference reported on rare-earth-doped all-solid photonic bandgap fibers to our knowledge. An output power of 3.6 W with a slope efficiency of 31- was obtained for a 100-cm-long fiber.展开更多
We found the beam quality factor M^(2)of the fundamental mode as a function of wavelength is U-shaped in the working photonic bandgap(PBG) of an all-solid PBG fiber(AS-PBGF) for the first time,to the best of our knowl...We found the beam quality factor M^(2)of the fundamental mode as a function of wavelength is U-shaped in the working photonic bandgap(PBG) of an all-solid PBG fiber(AS-PBGF) for the first time,to the best of our knowledge,and our simulation results also match well with the phenomenon.The normal band that is near the high-frequency edge of the third PBG integrates the lowest M^(2)and single-mode operation simultaneously,while the other two edge regions suffer from anomalous variation of M^(2)versus wavelength.The general applicability of this finding can be further extended to other PBGs and also other representative structures in the AS-PBGF field.展开更多
基金the National Basic Research Program of China (973 Program) under Grant 2014CB340102the National Natural Science Foundation under Grants 61271191 and 61271193the Fund of State Key Laboratory of Information Photonics and Optical Communications
文摘In this paper, we present a mode-selective coupler based on a dual-core all-solid photonic bandgap fiber（AS-PBGF）. Because they are all-solid, AS-PBGF-based mode converters are easier to splice to other fibers than those based on air-hole photonic crystal fibers. Mode conversions between the LP01 and LP11modes, LP01 and LP21modes, and LP01 and LP02modes are obtained at the wavelength λ=1550 nm. The 3 dB wavelength bandwidth of these mode converters are 47.8,20.3, and 20.3 nm, respectively.
基金supported by the Natural Science Foundation of Shanghai(No.17ZR1434000)the China Postdoctoral Science Foundation(No.2016M601653)the National Natural Science Foundation of China(No.61775224)
文摘A large-mode-area neodymium-doped silicate photonic bandgap fiber was theoretically designed and experimen- tMly demonstrated. The relative index step between the high-index rods and the background glass was -0.5%, which is the lowest cladding index difference reported on rare-earth-doped all-solid photonic bandgap fibers to our knowledge. An output power of 3.6 W with a slope efficiency of 31- was obtained for a 100-cm-long fiber.
基金financially supported by the National Natural Science Foundation of China (Nos. 62035015 and 61805280)the Innovation Group of Hunan Province, China (No. 2019JJ10005)+1 种基金the Research Plan of National University of Defense Technology (No. ZK19-07)the Open Research Fund of State Key Laboratory of Pulsed Power Laser Technology (No. SKL2020ZR07)
文摘We found the beam quality factor M^(2)of the fundamental mode as a function of wavelength is U-shaped in the working photonic bandgap(PBG) of an all-solid PBG fiber(AS-PBGF) for the first time,to the best of our knowledge,and our simulation results also match well with the phenomenon.The normal band that is near the high-frequency edge of the third PBG integrates the lowest M^(2)and single-mode operation simultaneously,while the other two edge regions suffer from anomalous variation of M^(2)versus wavelength.The general applicability of this finding can be further extended to other PBGs and also other representative structures in the AS-PBGF field.
