摘要
面向高精度光纤陀螺小型化的迫切需求,设计并成功拉制出一款包层直径为80μm的细径保偏光子晶体光纤。通过截断法、Sagnac干涉法等对所制备光纤的损耗、双折射、弯曲特性和温度特性进行测试。测试结果表明,该光纤在1550 nm处具有1.13 dB/km的低损耗和5.5×10^(-4)的高双折射,其双折射温度影响系数为5×10^(-8)℃-1,弯曲半径为16 mm时损耗为1.2 dB/km。该款光纤以小的外径、高的双折射、良好的温度稳定性及抗弯曲性能适用于高精度小型化光纤陀螺的开发。为了推进国产化高精度光纤陀螺的发展,开展了进口管材和国产管材制备光纤的对比研究。研究表明,国产管材制备的光纤在1550 nm波长处的损耗值明显劣于进口管材光纤,主要源于国产石英管材的纯度及管材几何精度等方面的影响。研究工作为国产管材的工艺改进指明了努力的方向。
Objective The fiber optic gyroscope(FOG)is a highprecision angular velocity sensor that serves as a key sensing component in modern highaccuracy inertial measurement technology.Currently,achieving high precision,miniaturization,and high environmental stability are the major challenges that hinder the development of FOGs for application in aerospace,satellite,strategic missile,and other inertial navigation systems.Finediameter polarizationmaintaining photonic crystal fibers offer an opportunity for FOGs to break through the bottleneck of achieving high precision,miniaturization,and high environmental stability.Oriented to the urgent demand of highprecision miniaturized FOG,a finediameter polarizationmaintaining photonic crystal fiber,with an 80μm cladding diameter,is designed and successfully manufactured.Methods The performance of duallargehole polarizationmaintaining photonic crystal fibers(PM PCFs),with a cladding outer diameter of 80μm,was optimized using the finiteelement method combined with a perfectly matched layer.Based on the optimal result,an optimal finediameter duallargehole PM PCF was designed.Then,a stackanddraw method was employed to manufacture two types of working samples of duallargehole PM PCFs with imported and domestic pure silica tubes.The cutback method and Sagnac interferometry were employed to test the loss and birefringence characteristics of the fiber sample.To validate its application in miniaturized FOG,the sample's bending characteristic was measured by bending it around cylinders with diameters of 5 mm and 16 mm.The temperature stability of birefringence,shown by the fiber sample,was evaluated within the temperature range from−40℃to 60℃by placing the test fiber in a temperature chamber.Finally,the performances of the two types of duallargehole PM PCFs,fabricated with imported and domestic pure silica tubes,were compared.Results and Discussions Experimental results demonstrate that the fiber exhibits a low loss of 1.13 dB/km and high birefringence of 5.5×10^(−4) at 1550 nm(Fig.4 and 5).Its birefringence temperature coefficient reaches 5×10^(−8)℃^(-1) from−40℃to 60℃,and the low loss of 1.2 dB/km can be maintained at a bending radius of 16 mm(Fig.6 and 8).This result demonstrates that the fabricated fiber can be utilized to develop highprecision miniaturized FOG owing to its small diameter,high birefringence,excellent temperature stability,and high bending performance.To promote the domestic development of highprecision FOG,a comparative study of optical fibers manufactured using imported and domestic pure silica tubes is performed.Fig.9 demonstrates significant performance difference between the fibers fabricated with imported and domestic pure silica tubes.At a wavelength of 1550 nm,the fiber fabricated using imported tubes exhibits a transmission loss of 1.13 dB/km,whereas the domestic fiber shows a markedly high transmission loss of 7.36 dB/km.In addition,while both fibers display pronounced hydroxyl(OH⁻)absorption peaks at 1390 nm,the domestical fiber undergoes extreme degradation with a loss of 206.06 dB/km,which is 6.3 times higher than that of the imported fiber.Furthermore,in the wavelength range of 1400‒1700 nm,the birefringence shown by the domestic fiber is relatively lower than that exhibited by the imported fiber.However,both fibers maintain birefringence magnitudes of the order of 10-4,thus showing a good polarizationmaintaining performance.Conclusions In this study,finediameter PM PCFs,exhibiting low losses,high birefringence,excellent temperature stability,and high bending performances,have been designed and successfully fabricated.These good optical performances confirm the feasibility of applying the fabricated fibers in highprecision miniaturized FOG.Simultaneously,the loss of the fiber prepared using the domestic pure silica tube at a wavelength of 1550 nm is higher than that of the fiber manufactured using the imported pure silica tube.This result is mainly attributed to the influence of the purity and geometrical accuracy of the domestic pure silica tubes,highlighting the manufacturing process of domestic pure silica tubes as a possible direction for improvement.
作者
郭玉颖
杜梦珠
高炜
曹佳琦
盛新志
娄淑琴
廉正刚
Guo Yuying;Du Mengzhu;Gao Wei;Cao Jiaqi;Sheng Xinzhi;Lou Shuqin;Lian Zhenggang(Beijing Key Laboratory of Communication and Information Systems,School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China;Yangtze Optics Electronics Co.Ltd.,Wuhan 430205,Hubei,China;School of Physical Sciences and Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《中国激光》
北大核心
2025年第13期185-193,共9页
Chinese Journal of Lasers
基金
国家自然科学基金(12174022)
北京市自然科学基金(1232028)。
关键词
光纤陀螺
细径保偏光子晶体光纤
双折射
损耗
温度稳定性
fiberoptic gyro
finediameter polarizationmaintaining photonic crystal fiber
birefringence
loss
temperature stability
作者简介
通信作者:娄淑琴,shqlou@bjtu.edu.cn;通信作者:廉正刚,lianzhenggang@yoec.com.cn。
