DataVXACS PhotonicsPaper
journal article·2023-07-19

Monolithic Integrated Linear Frequency Modulated Dual-Wavelength DFB Laser Chip with High Linearity and Its Application in Long Distance Ranging

Yunshan Zhang, Yifan Xu, Jianqin Shi, Tongfei Zhao, Pu Li, Shijian Guan, Lianyan Li, Xin Zhang, Jilin Zheng, Tao Fang, Xiangfei Chen, Yuncai Wang

ACS Photonics· Volume 10· Issue 7
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Source abstract

Abstract

The ranging distance and precision of the coherent frequency modulated continuous wave (FMCW) lidar systems are mainly limited by the modulation linearity and the intrinsic line width of the laser sources. To this issue, we design and experimentally demonstrate a monolithic integrated linear frequency modulated (LFM) dual-wavelength (DW) DFB laser with high frequency sweep linearity and without a complicated predistortion compensation system. Our results show that the nonlinearity of the LFM beat signal from the DW-DFB laser chip can reach 0.0146%. Furthermore, using the LFM DW-DFB laser, we implement an accurate measurement of a single mode fiber (SMF) with a length of 12.6 km, which is hundreds of times the intrinsic coherent length of the DW-DFB laser. Due to the high linearity of the LFM DW-DFB laser, the measurement error does not deteriorate significantly when the target distance increases from 0.43 to 24.24 m.
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Research context

OpenAlex topics: Advanced Fiber Laser Technologies · Advanced Optical Sensing Technologies · Advanced Fiber Optic Sensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Electronic and Optical Engineering and College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China

Guangdong Provincial Key Laboratory of Photonics Information Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China

Guangdong University of Technology, Guangzhou 510006, China

Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China

College of Engineering and Applied Sciences, Nanjing University, Nanjing 210023, China

College of Communications Engineering, PLA Army Engineering University, Nanjing 210007, China

Funding

Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China

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