分布式反馈激光器模拟控温检测系统研制

丁向美; 钟乐海; 董静霆; 杨江

doi:10.11884/HPLPB202133.210381

分布式反馈激光器模拟控温检测系统研制

doi: 10.11884/HPLPB202133.210381

1.
绵阳职业技术学院电子与信息学院，四川绵阳 621000
2.
中国工程物理研究院流体物理研究所, 四川绵阳 621900

详细信息

作者简介:
丁向美，dxm68344162@163.com

通讯作者:
钟乐海，lhzhong@mypt.edu.cn

中图分类号: TP29
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- 被引次数: 0
出版历程
- 收稿日期: 2021-08-29
- 修回日期: 2021-11-08
- 网络出版日期: 2021-11-16
- 刊出日期: 2021-11-15

Development of analog temperature control and detection system for distributed feedback laser

1.
School of Electronics and Information, Mianyang Polytechnic, Mianyang 621000, China
2.
Institute of Fluid Physics, CAEP, Mianyang 621900, China

摘要

摘要: 温度对分布式反馈(DFB)激光器的性能指标和工作寿命有着重要影响。针对宽温度范围下的激光器应用，分析了激光器温控系统的研究现状及趋势，给出了温控系统的设计原理，采用线性驱动与PID闭环控制方法，应用模拟器件，研制了一种DFB激光器的模拟控温检测系统，并利用该系统对1550 nm的DFB激光器进行了试验验证。结果表明，系统在−55 ℃～70 ℃的全温度范围下，保持长时间工作（≥2 h），激光器的工作状态稳定，中心波长未出现漂移。系统的温度控制精度随着工作环境温度的范围不同而有所差异，在室温环境下可达到±0.02 ℃，在全温范围内控制精度在±0.8 ℃以内，跟踪误差小于±0.5 dB。与传统的激光器温控系统相比，本系统工作温度范围宽、控制精度高，且体积小、成本低、简单可靠，对于温度环境要求较为严苛的DFB激光器应用场景，具有重要的工程实践意义。
- TEC驱动 /
- PID补偿 /
- 分布式反馈激光器 /
- 运算功率放大器
Abstract: Temperature has an important influence on the performance index and working life of distributed feedback (DFB) laser. Aiming at the laser application in a wide temperature range, the research status and trend of laser temperature control system are analyzed, and the design principle is given. A simulated temperature control and detection system of DFB laser is developed by using linear drive and PID closed-loop control method and simulator, and the system is used to verify the 1550 nm DFB laser. The results show that the system could work for a long time (≥2 h) in the full temperature range of −55 ℃−70 ℃, the working state of the laser was stable, and the central wavelength did not drift. The temperature control precision of the system varies with the temperature range of the working environment. It can reach ±0.02 ℃ at room temperature within ±0.8 ℃ in the full temperature range, and the tracking error is less than ±0.5 dB. Compared with the traditional laser temperature control system, the system has wider working temperature range, higher control precision, smaller volume, and lower cost, being simple and reliable. For the application of DFB laser with strict temperature environment requirements, it has important engineering practical significance.
- TEC driver /
- PID compensation /
- distributed feedback laser /
- operational power amplifier

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图 1 模拟控温检测系统框图

Figure 1. Block diagram of temperature control system

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图 2 温度检测电路

Figure 2. Temperature detection circuit

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图 3 误差放大电路

Figure 3. Error amplifying circuit

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图 4 PID补偿电路

Figure 4. PID compensation circuit

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图 5 TEC驱动电路图

Figure 5. TEC drive circuit diagram

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图 6 TEC驱动仿真电路图

Figure 6. TEC drive simulation circuit diagram

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图 7 LD温度监视电路图

Figure 7. LD temperature monitoring circuit diagram

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图 8 DFB激光器温度控制试验框图

Figure 8. Test block diagram of DFB laser temperature control system

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图 9 温度试验验证平台实物图

Figure 9. Photo of temperature test verification platform

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图 10 5只LD的三温数据曲线

Figure 10. Three-temperature data curve of 5 LDs

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图 11 5只LD的三温光功率曲线

Figure 11. Three-temperature optical power curve of 5 LDs

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表 1 5只LD的常温测试数据表

Table 1. Test data table of 5 LDs at 25 ℃

No.	condition	T_e/℃	I_atc/mA	V_th/V	P_out/dBm	λ/nm	R_th/kΩ	T/℃	ΔT/℃
1	initial state	25	80	0.847	9.66	1547.63	10	25	/
1	after 2 h	25	79	0.847	9.66	1547.63	10.00788	24.98201	−0.01789
2	initial state	25	60	0.847	11.69	1548.04	10	25	/
2	after 2 h	25	62	0.847	11.68	1548.04	10.00788	24.98201	−0.01789
3	initial state	25	60	0.848	10.0	1548.71	10	25	/
3	after 2 h	25	62	0.848	9.99	1548.71	10.00654	24.98507	−0.01493
4	initial state	25	59	0.847	10.29	1547.93	10	25	/
4	after 2 h	25	60	0.847	10.29	1547.93	10.00788	24.98201	−0.01789
5	initial state	25	77	0.848	9.85	1548.54	10	25	/
5	after 2 h	25	78	0.848	9.85	1548.54	10.00654	24.98507	−0.01493

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表 2 5只LD的三温环境测试数据表

Table 2. Three-temperature environment test data table of 5 LDs

No.	T_e/℃	I_atc/mA	V_th/V	P_out/dBm	λ/nm	R_th/kΩ	T/℃	ΔT/℃	TE/dB
1	+25	80	0.847	9.66	1547.63	10	25	/	/
	−55	790	0.851	9.31	1547.63	10.14879	24.66305	−0.33695	0.35
	+70	640	0.841	9.62	1547.62	9.801321	25.45906	0.45906	/
2	+25	60	0.847	11.69	1548.04	10	25	/	/
	−55	753	0.851	11.59	1548.03	10.14879	24.66305	−0.33695	/
	+70	636	0.842	11.35	1548.03	9.835354	25.37966	0.37966	0.34
3	+25	60	0.848	10.0	1548.71	10	25	/	/
	−55	740	0.852	9.68	1548.7	10.14707	24.66689	−0.3331	0.48
	+70	580	0.838	10.16	1548.7	9.666254	25.77731	0.77731	/
4	+25	59	0.847	10.29	1547.93	10	25	/	/
	−55	745	0.849	9.99	1547.92	10.07801	24.82263	−0.17737	0.37
	+70	627	0.839	10.36	1547.92	9.733716	25.61771	0.61771	/
5	+25	77	0.848	9.85	1548.54	10	25	/	/
	−55	779	0.85	9.6	1548.56	10.07648	24.82608	−0.17391	0.32
	+70	599	0.843	9.92	1548.55	9.834462	25.381742	0.38174	/

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