Experimental Study of Thermal Decay of Fiber Bragg Grating and its Theoretical Modeling of Arrhenius Analysis

光纤布拉格光栅热衰变实验研究及其阿累尼乌斯分析理论模型

• 批准号: 15560298
• 负责人: EJIMA Seiki
• 金额: $ 1.41万
• 依托单位: Kagawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560298/
• 关键词: Fiber grating; Optical fiber; Fiber Bragg grating; Annealing; Hydrogen loading; UV laser; Induced refractive index; ファイバーブラックグレーティング

Optical spectrum of fiber Bragg grating (FBG) produced from hydrogen-loaded optical fiber is well known to evolve over a wide range after its fabrication by exposing to UV laser, that is, thermal decay. The purposes of this research are (1) to stabilize the optical spectrum by annealing thermal treatment so that the wavelength and reflectivity of the FBG do not vary at all, and (2) to understand the physics reason of the thermal decay. We have achieved following three major results.(1)We have proved that the evolution of short-period FBG wavelength after its fabrication is dominantly defined by out-diffusion of hydrogen molecules from the optical fiber. Quantitative agreement has been obtained with theoretical calculation of hydrogen diffusion in silica glass of the optical fiber.(2)In long-period FBG, the wavelength goes through a large upswing ranging over several tens to 100 nm and transmission minimum becomes deeper after its fabrication. Using theory of hydrogen diffusion and comp … More uter FBG simulation, we have revealed that the spectrum evolution is caused by quenching and re-filling of the hydrogen in the fiber core. The hydrogen in the core is dissociated by UV irradiation into atoms, and some H-atoms react with doped Ge in the fiber core forming Ge-OH bond and others return back to molecules by simple recombination, that is, the hydrogen is depleted in the fiber core, i.e. quenching. Then the surrounding cladding of the fiber supplies hydrogen to the core, i.e. re-filling. We have demonstrated that the spectrum evolution can be all explained by the quenching and re-filling.(3)Erdogan's theory has been extensively used for the analysis of thermal decay process of the short-period FBGs. To the best of our knowledge, no attempt has ever been made to apply the theory to long-period FBGs. Using the above result about the spectrum evolution by hydrogen quenching and re-filling, we have succeeded in applying the Erdgan's theory to long-period FBGs.We have published the first result to Journal of Lightwave Technology, and we have completed submitting our second result to Applied Optics. For the third result, we plan to publish soon. Less

众所周知，由载氢光纤制成的光纤布拉格光栅(FBG)在受到紫外光照射后，其光谱会发生较大范围的演化，即热衰变。这项研究的目的是(1)通过退火热处理来稳定光谱，使FBG的波长和反射率完全不变，以及(2)了解热衰减的物理原因。我们取得了以下三个主要成果：(1)我们证明了短周期FBG制作后波长的演化主要是由氢分子从光纤中外扩散决定的。与光纤中氢在石英玻璃中扩散的理论计算得到了定量的一致。(2)在长周期FBG中，波长经历了几十到100 nm的大幅上升，制作后透过率极小值变得更深。利用氢扩散理论和COMP…进一步的FBG模拟表明，光谱演化是由纤芯中氢的猝灭和再填充引起的。纤芯中的氢通过紫外光照射分解成原子，一些H原子与纤芯中掺杂的Ge反应形成Ge-OH键，另一些则通过简单的复合回到分子中，即氢在光纤芯中耗尽，即猝灭。然后，光纤周围的包层向纤芯提供氢气，即重新填充。我们证明了光谱演化都可以用猝灭和再填充来解释。(3)埃尔多安理论被广泛用于分析短周期FBG的热衰变过程。据我们所知，还没有人尝试将该理论应用于长周期FBG。利用上述氢致猝灭和再填充的光谱演化结果，我们成功地将Erdgan理论应用于长周期FBG，并在《光波技术》杂志上发表了第一个结果，并将第二个结果提交给了应用光学。对于第三个结果，我们计划很快发表。较少

项目成果

チューナブル長周期ファイバーグレーティングの製作と特性評価

可调谐长周期光纤光栅的制作和表征

• 发表时间: 2004
• 期刊: 電子情報通信学会論文誌C J88-C, 1
• 作者: 横内孝史;他
• 通讯作者: 他

長周期ファイバーグレーティングを用いたイコライザーの研究

长周期光纤光栅均衡器的研究

• 发表时间: 2003
• 期刊: 日本材料学会四国支部学術講演会、(於高知工科大学)、April 21,2003 4
• 作者: 藤田圭生;他
• 通讯作者: 他

光ファイバーの曲げによる強度測定

通过弯曲光纤测量强度

• 发表时间: 2003
• 期刊: 電気関係学会四国支部連合大会(於 愛媛大学)、Oct.12,2003 平15
• 作者: 森山健二;他
• 通讯作者: 他

Dependence of Fiber Bragg Grating Characteristics on its Length

• DOI: 10.1143/jjap.43.4234
• 发表时间: 2004-07
• 期刊: Japanese Journal of Applied Physics
• 影响因子: 1.5
• 作者: M. Ando;M. Yamauchi;Keisuke Nakayama;K. Moriyama;K. Fujita;Y. Masuda;M. Kimura;Y. Mizutani;S. Kimura;T. Yokouchi;Y. Suzaki;K. Nakagawa;S. Ejima

Improved temperature compensation for fiber Bragg grating utilizing the elasticity of adhesives

利用粘合剂的弹性改进光纤布拉格光栅的温度补偿

• 发表时间: 2004
• 期刊: IEICE transactions on electronics (in Japanese) J87-C9
• 作者: Takashi YOKOUCHI;Keio FUJITA;Yuji MASUDA;Kiyoshi NAKAGAWA;Yoshifumi SUZAKI;Seiki EJIMA;Yasuo MIZUTANI;Makoto YAMAUCHI;Masanori KIMURA;Susumu KIMURA
• 通讯作者: Susumu KIMURA