中国激光, 2020, 47 (12): 1206004, 网络出版: 2020-11-17   

调制光栅Y分支激光器准连续调谐特性 下载: 964次

Quasi-Continuous Tuning Characteristics of Modulated Grating Y-Branch Lasers
作者单位
1 大连理工大学物理学院, 辽宁 大连 116024
2 大连理工大学光电工程与仪器科学学院, 辽宁 大连 116024
摘要
调制光栅Y分支(MG-Y)可调谐半导体激光器能够实现宽波长范围的快速调谐,有望成为光纤传感应用中最有发展前景的光源之一。为了满足光纤传感应用中对于精细波长准连续调谐的需求,提出了一种基于样条插值的MG-Y型激光器的自动化测试技术。该方案充分利用了MG-Y激光器的调谐特性,通过左、右光栅反射区电流的粗扫描获取覆盖40 nm范围的平滑的调谐路径。将每一条路径内的左右光栅反射区电流组合对应的线性调谐段进行去重拼接后,可实现目标波长的快速插值检索。通过对半导体光放大器的电流和相位区电流的双重校准,实现了激光器在不同输出波长下的平坦功率。利用该技术构建了覆盖1527~1567 nm、波长间隔为8 pm的波长-电流查找表。该查找表的电流调谐路径平滑,功率波动小于0.2 dBm,可用于需要进行快速光谱采集的光纤传感应用中。
Abstract
A modulated grating Y-branch (MG-Y) tunable semiconductor laser can achieve fast tuning in a wide wavelength range and is expected to become one of the most promising light sources in fiber optic sensing applications. In order to meet the demand for fine wavelength quasi-continuous tuning in fiber optic sensing applications, this paper proposes an automated test technique for MG-Y lasers based on spline interpolation. This scheme makes full use of the tuning characteristics of the MG-Y laser. A smooth tuning path covering the range of 40 nm is obtained by coarse scanning of the currents in the reflection areas of the left (IRR) and right (ILR) gratings. After the deduplication and stitching of the linear tuning sections corresponding to each IRR and ILR pair, fast interpolation retrieval can be realized. Through the double calibration of current of the semiconductor optical amplifier and current in the phase region, the flat laser powers at different output wavelengths are realized. Using this automated calibration technique, a wavelength-current look-up table covering 1527 nm to 1567 nm and with a wavelength interval of 8 pm is constructed. The look-up table has smooth current tuning paths and the power fluctuation is less than 0.2 dBm, which can be used in fiber optic sensing applications requiring fast spectrum acquisition.

刘强, 荆振国, 李昂, 黄致远, 彭伟. 调制光栅Y分支激光器准连续调谐特性[J]. 中国激光, 2020, 47(12): 1206004. Liu Qiang, Jing Zhenguo, Li Ang, Huang Zhiyuan, Peng Wei. Quasi-Continuous Tuning Characteristics of Modulated Grating Y-Branch Lasers[J]. Chinese Journal of Lasers, 2020, 47(12): 1206004.

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