低噪声宽调谐<styled-content style-type="number">1018</styled-content> nm DBR窄线宽单频光纤激光器

于龙昆; 肖鑫; 余世淏; 李磐; 罗子人

doi:10.37188/CO.2025-0071

低噪声宽调谐1018 nm DBR窄线宽单频光纤激光器

doi: 10.37188/CO.2025-0071

cstr: 32171.14.CO.2025-0071

于龙昆^{1, 2,},
肖鑫¹,
余世淏¹,
李磐^3, ,,
罗子人^{3, 4}

1.
南昌大学信息工程学院, 江西南昌 330031
2.
南昌大学先进制造学院, 江西南昌 330031
3.
中国科学院力学研究所微重力重点实验室, 北京 100190
4.
国科大杭州高等研究院, 杭州 310024

基金项目: 国家重点研发计划（No. 2021YFC2201803）；国家自然科学基金（No. 42165007）

详细信息

作者简介:
于龙昆（1987—），男，江西九江人，博士，副教授，硕士生导师，主要从事光学湍流效应评估/图像处理、光电测量技术等方面的研究。E-mail：yulongkun@ncu.edu.cn

李　磐（1986—），男，湖南益阳人，博士，副研究员，硕士生导师，主要从事激光技术及应用，窄线宽激光及放大、激光非线性变频和引力波激光噪声评估与抑制等方面的研究。E-mail：lipan@imech.ac.cn

中图分类号: TN248;TN710
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出版历程
- 网络出版日期: 2025-08-21

Low noise wide tuning 1018 nm DBR narrow linewidth single frequency fiber laser

YU Long-kun^{1, 2
,},
XIAO Xin¹,
YU Shi-hao¹,
LI Pan^{3
, ,},
LUO Zi-ren^{3, 4}

1.
College of Information Engineering, Nanchang University, Nanchang 330031, China
2.
College of Advanced Manufacturing, Nanchang University, Nanchang 330031, China
3.
Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
4.
Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China

Funds: Supported by National Key Research and Development Program (No. 2021YFC2201803); National Natural Science Foundation of China (No. 42165007)

More Information

Corresponding author: lipan@imech.ac.cn

摘要

摘要:
本文针对里德堡微波测量领域对1018 nm单频种子源迫切需求，研制了一种线宽为810 Hz、相对强度噪声低于−140 dB/Hz的宽调谐1018 nm单频光纤激光器。该激光器基于分布式布拉格反射（DBR）结构，使用8毫米长的掺镱光纤，激光器配有高稳定的主动温控系统以及压电陶瓷（PZT）快速频率调谐装置。温度控制范围为10 °C至80 °C，在25 °C控温2小时内DBR谐振腔的温度波动仅±0.0005 °C。经实验测试，激光器25 °C温度下保持单纵模输出，线宽为810 Hz，温度调谐范围超过0.9 nm，PZT快速调谐范围高达10 GHz，在调谐过程中不会出现跳模现象。单频激光在1 kHz低频段的相对强度噪声为−150 dB/Hz，当频率大于1.5 MHz时的相对强度噪声低于−140 dB/Hz。该结果表明激光器输出低噪声的同时实现了宽调谐。
- 低噪声 /
- 宽调谐 /
- 高稳定温控 /
- PZT驱动 /
- 光纤激光器
Abstract:
This study addresses the urgent demand for 1018 nm single-frequency seed sources in the field of Rydberg microwave measurements by developing a widely tunable 1018 nm single-frequency fiber laser with a linewidth of 810 Hz and a relative intensity noise below −140 dB/Hz.The laser employs a distributed Bragg reflector (DBR) structure with an 8-mm-long ytterbium-doped fiber and incorporates a high-stability active temperature control system and a piezoelectric ceramic (PZT)-based fast frequency tuning device. The temperature control range was from 10 °C to 80 °C, and the temperature fluctuation of the DBR resonance cavity was only ±0.0005 °C within 2 hours at 25 °C temperature control. After experimental testing, the laser maintains a single longitudinal mode output at 25°C, with a linewidth of 810Hz, a temperature tuning range of more than 0.9 nm, and a fast tuning range of the PZT up to 10 GHz, there is no mode-hopping phenomenon in the tuning process. The relative intensity noise of a single-frequency laser is −150 dB/Hz in the low frequency band of 1 kHz, and below −140 dB/Hz when the frequency is greater than 1.5 MHz. This result shows that the laser output is low noise while achieving wide tuning.
- low noise /
- wide tuning /
- high stability temperature control /
- PZT driver /
- Fiber lasers

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图 1 单频DBR光纤激光器的结构

Figure 1. Structure of single frequency DBR fiber laser

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图 2 低噪声宽调谐1018 nm单频光纤激光器的结构

Figure 2. Structure of a low-noise broadly tuned 1018-nm single-frequency fiber laser

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图 3 基于TEC的温控系统结构

Figure 3. TEC-based temperature control system structure

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图 4 基于AD8422的温度误差放大电路

Figure 4. Temperature Error Amplifier Circuit Based on AD8422

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图 5 模拟PID补偿网络结构

Figure 5. Analog PID compensation network structure

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图 6 H桥电路结构

Figure 6. H-bridge circuit structure

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图 7 PZT驱动电路原理图

Figure 7. Schematic diagram of PZT driving circuit

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图 8 激光器实验系统及激光器实物图

Figure 8. Laser Experiment System and Laser Physical Drawing

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图 9 温控25 °C曲线

Figure 9. Temperature control 25 °C curve

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图 10 DBR温度随时间变化

Figure 10. DBR temperature variation with time

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图 11 温度随时间响应曲线图

Figure 11. Temperature versus time response graph

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图 12 带载情况下的输出情况

Figure 12. Output with load

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图 13 激光器输出纵模特性

Figure 13. Laser output longitudinal modeling

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图 14 输出激光光谱在不同温度下曲线

Figure 14. Output laser spectrum at different temperatures

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图 15 激光线宽测试平台

Figure 15. Laser linewidth test bench

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图 16 DBR光纤激光线宽测试图

Figure 16. DBR fiber laser linewidth test chart

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图 17 DBR单频光纤激光器的RIN

Figure 17. RIN of the DBR single-frequency fiber laser

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图 18 PZT调谐下输出激光频率变化

Figure 18. Output laser frequency variation under PZT tuning

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