红外与毫米波学报, 2020, 39 (6): 696, 网络出版: 2021-01-20
工作波长为2.94 μm保偏空芯负曲率光纤
图 & 表
图 1. 保偏HC-NCF端面图
Fig. 1. Polarization maintain hollow core negative curvature fiber end view
图 2. (a)y 方向包层管厚度t 1y 和嵌套管到包层管内径最大距离Z 对HC-NCF PER的影响,(b)当t 1y /t 1x 为2.15(t 1y 为1.60 μm),Z 为11.76 μm时,x 和y 方向偏振模式
Fig. 2. (a)y -directional clad tube thickness t 1y and nested tube to the inner diameter of the tube maximum distance Z on the influence of HC-NCF PER ,(b)when t 1y /t 1x is 2.15 (t 1y is 1.60 μm), Z is 11.76 μm, x and y direction polarization mode
图 3. 纤芯直径D core对保偏HC-NCF的影响 (a) 模式的限制损耗随D core发生变化,(b) PER和HOMER随D core发生变化,(c) Re(n eff)随D core发生变化,(d) 模式耦合过程
Fig. 3. The effect of core diameter D core on polarization maintain HC-PCF (a) The confinement loss of the modes changes with D core, (b) PER and HOMER changes with D core, (c) Re(n eff) change with D core,(d) the mode-field coupling process
图 4. 包层管直径D tube对保偏HC-NCF的影响 (a) 限制损耗随D tube发生变化,(b) Re(n eff)随D tube发生变化
Fig. 4. The effect of the cladding tube diameter D tube on polarization maintain HC-NCF (a) the confinement loss of the mode changes with D tube, (b) Re(n eff) changes with D tube
图 5. 模式随D tube变化的耦合过程:当包层管外径D tube为79.57 μm时,(a) x -pol core mode,(b) Clad surface mode1;当包层管外径D tube为91.14 μm时,(c) y-pol core mode,(d) Clad surface mode2
Fig. 5. Coupling process of mode changing with D tube: When D tube=79.57 μm, (a) x-pol core mode, (b) Clad surface mode1; When D tube=91.14μm, (c) y-pol core mode, (d) Clad surface mode2
图 6. 保偏HC-NCF随波长变化而发生的模式耦合过程(a)模式的有效折射率,(b)耦合过程
Fig. 6. Polarization maintain HC-NCF mode coupling process with wavelength change (a) effective refractive index, (b)coupling process of mode
图 7. 保偏HC-NCF随波长变化的传输特性 (a) 模式的限制损耗随波长发生变化,(b) PER和HOMER随波长发生变化,(c) 双折射B随波长发生变化,(d) 当波长为2.94 μm时,x 方向偏振模式和高阶模式的模场图
Fig. 7. Polarization maintain HC-NCF transmission characteristics with wavelength change (a) Mode-limited loss changes with wavelength, (b) PER and HOMER change with wavelength, (c) Birefringence change with wavelength, (d) x-pol core mode(top) and high order mode(bottom)
韩颖, 李正然, 朱维震, 宋朋, 周凡迪, 杨骐豪, 王彦, 龚琳, 杨慢, 王伟, 侯蓝田. 工作波长为2.94 μm保偏空芯负曲率光纤[J]. 红外与毫米波学报, 2020, 39(6): 696. Ying HAN, Zheng-Ran LI, Wei-Zhen ZHU, Peng SONG, Fan-Di ZHOU, Qi-Hao YANG, Yan WANG, Lin GONG, Man YANG, Wei WANG, Lan-Tian HOU.