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- Title
Convolution Error Reduction for a Fabry–Pérot-Based Linewidth Measurement: A Theoretical and Experimental Study.
- Authors
Hun, Xuanning; Bai, Zhenxu; Wang, Jianping; Chen, Bin; Cui, Can; Wang, Yulei; Lu, Zhiwei
- Abstract
Linewidth measurement of a short pulse single-longitudinal mode laser with a low repetition rate has been a big challenge. Although the Fabry–Pérot (FP) etalon in combination with a beam profiler is an effective approach to measure the linewidth, the convolution error introduced by the inherent transmission spectrum width of an FP restricts the measurement accuracy. Here, the source of convolutional errors of the FP etalon-based linewidth measurement is analyzed, and the convolutional fitting method is proposed to reduce the errors. The results show that the linewidth measurement using the FP cavity with low reflectance (95%) can achieve the same resolution as that with high reflectance (99.5%) based on this convolution error reduction method. The study provides a simple approach to accurately measuring the linewidth of pulsed lasers, even with low energy.
- Subjects
MEASUREMENT errors; MATHEMATICAL convolutions; REFLECTANCE; LASER pulses
- Publication
Photonics, 2022, Vol 9, Issue 12, p1004
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics9121004