应用于单纵模光纤激光器的复合环腔滤波器的理论仿真

程丹; 张昆; 房一涛; 张浩彬; 程昭晨; 吴佟; 余洋; 孙儒峰; 李尧; 宋奎岩; 张利明; 张大勇; 赵鸿; 冯亭

doi:10.11884/HPLPB202335.230145

应用于单纵模光纤激光器的复合环腔滤波器的理论仿真

doi: 10.11884/HPLPB202335.230145

程丹^1,,
张昆^1, ,,
房一涛¹,
张浩彬¹,
程昭晨¹,
吴佟¹,
余洋¹,
孙儒峰¹,
李尧¹,
宋奎岩¹,
张利明¹,
张大勇¹,
赵鸿¹,
冯亭^2, ,

1.
中国电子科技集团第十一研究所，固体激光技术重点实验室，北京 100016
2.
河北大学物理科学与技术学院光信息技术创新中心，河北保定 071002

基金项目: 国防科技重点实验室基金项目

详细信息

作者简介:
程　丹，dcheng@bjtu.edu.cn

通讯作者:
张　昆，nukzhang@163.com

冯　亭，wlxyft@hbu.edu.cn。

中图分类号: TN248
计量
- 文章访问数: 276
- HTML全文浏览量: 96
- PDF下载量: 86
- 被引次数: 0
出版历程
- 收稿日期: 2023-05-25
- 修回日期: 2023-10-23
- 录用日期: 2023-10-23
- 网络出版日期: 2023-10-27
- 刊出日期: 2023-12-15

Theoretical simulation of compound ring cavity filter for single longitudinal mode fiber laser

1.
Science and Technology on Solid-State Laser Laboratory, No. 11th Research Institute of China Electronics Technology Group Corporation, Beijing 100016, China
2.
Photonics Information Innovation Center, College of Physics Science & Technology, HeBei University, Baoding 071002, China

摘要

摘要: 提出了一种用于单纵模激光器选模的基于光纤耦合器的光纤复合环腔（CRC）滤波器的仿真方法，利用该方法对两种新型双耦合器双环CRC （DCDR-CRC）滤波器及三耦合器双环CRC （TCDR-CRC）滤波器进行了理论仿真，通过引入游标原理，分析了两种滤波器在不同环长差下的滤波特性，并通过调整DCDR-CRC及TCDR-CRC的耦合比、环长及环长差，对有效自由光谱范围（FSR）、抑制比（SR）及主透射峰带宽进行优化，计算结果表明优化后环腔的有效FSR可有效抑制波长选择器传输通带内的增益竞争，较低的SR可以抑制CRC滤波器相邻透射峰之间的增益竞争，较窄的主透射峰可以保证仅有一个激光器的纵模被选择。
- 滤波器 /
- 单纵模 /
- 双耦合器双环腔 /
- 三耦合器双环腔 /
- 游标原理
Abstract: A method for simulating the optical-coupler-based fiber compound ring cavity (CRC) filter for mode selection of the single longitudinal mode fiber laser is proposed. With this method, we theoretically simulated two types of novel dual-coupler double ring CRC (DCDR-CRC) filter and tri-coupler double ring CRC (TCDR-CRC) filter. By introducing the Vernier effect, the transmittance characteristics of the proposed two filters under different cavity length differences are analyzed. The effective free spectral range (FSR), suppression ratio (SR) and bandwidth of the main transmission peak of CRC filters are optimized by adjusting the coupling ratios, cavity length and cavity length difference of the DCDR-CRC and TCDR-CRC filters. The simulated results show that the optimized effective FSR of the ring cavity can effectively suppress the gain competition in the transmission passband of the wavelength selector. Furthermore the lower SR can suppress the gain competition between the adjacent transmission peaks of the CRC filter, and the narrower bandwidth of the main transmission peak can ensure that only one longitudinal mode of the laser can be selected.
- filter /
- single longitudinal mode /
- dual-coupler double ring /
- tri-coupler double ring /
- Vernier effect

HTML全文

图 1 光纤光栅结合复合子环腔滤波器选模过程图

Figure 1. Schematic diagram of the process of mode-selecting by the FBG and the subring compound cavity filter

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图 2 光学游标效应原理图^[10-11]

Figure 2. Schematic diagram of the optical Vernier effect principle^[10-11]

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图 3 基于双3×3对称型OC的DCDR-CRC结构示意图

Figure 3. Schematic diagram of the DCDR-CRC basedon two symmetric 3 × 3 optical couplers

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图 4 不同环长差下双耦合器复合双环腔(DCDR)传输谱，内插图为一个FSR内DCDR传输谱的放大图

Figure 4. Transmission spectra of the dual-coupler double ring compound cavity at various cavity length differences，where the insets are the zoomed-in transmission spectra over one FSR of the simulated DCDR

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图 5 TCDR-CRC结构示意图

Figure 5. Schematic diagram of the TCDR-CRC

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图 6 不同环长差下TCDR-CRC传输谱, 内插图分别为一个FSR内TCDR传输谱的放大图及最高透射峰传输谱放大图

Figure 6. Transmission spectra of the TCDR-CRC at various cavity length differences，where the insets are the zoomed-in transmission spectraover one FSR and the highest transmission peak of the simulated TCDR, respectively

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图 7 环长及环长差固定，不同耦合比下仿真所得TCDR的传输谱, 内插图分别为一个FSR内TCDR传输谱的放大图及最高透射峰传输谱放大图

Figure 7. Transmission spectra of the TCDR compound cavity at different coupling ratios with certain cavity length and cavity length difference, where the insets are the zoomed-in transmission spectra over one FSR and the highest transmission peak of the simulated TCDR, respectively

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图 8 耦合比及环长差固定，不同腔长下仿真所得TCDR传输谱, 内插图分别为一个FSR内TCDR传输谱的放大图及最高透射峰传输谱放大图

Figure 8. Transmission spectra of the TCDR compound cavity at different cavity lengths and certain coupling ratio and cavity length difference, where the insets are the zoomed-in transmission spectra over one FSR and the highest transmission peak of the simulated TCDR, respectively

下载: 全尺寸图片幻灯片

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