Fast and high-resolution spectroscopy based on asynchronous optical sampling
Dispersive time stretch has made many ultrafast applications possible owing to its high frame rate, as compared to conventional spectroscopies. By further introducing a converging time lens, this spectroscopy can resolve arbitrary emission spectra within the aperture. However, a spectral resolution...
Main Authors: | , , , , , , , |
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Format: | Article |
Language: | English |
Published: |
NLM (Medline)
2022
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Subjects: | |
Online Access: | View Fulltext in Publisher |
LEADER | 01946nam a2200265Ia 4500 | ||
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001 | 10.1364-OE.456605 | ||
008 | 220510s2022 CNT 000 0 und d | ||
020 | |a 10944087 (ISSN) | ||
245 | 1 | 0 | |a Fast and high-resolution spectroscopy based on asynchronous optical sampling |
260 | 0 | |b NLM (Medline) |c 2022 | |
856 | |z View Fulltext in Publisher |u https://doi.org/10.1364/OE.456605 | ||
520 | 3 | |a Dispersive time stretch has made many ultrafast applications possible owing to its high frame rate, as compared to conventional spectroscopies. By further introducing a converging time lens, this spectroscopy can resolve arbitrary emission spectra within the aperture. However, a spectral resolution of tens of picometers hinders its high-precision application. There are two limitations: the temporal aperture of the acquired signal and the actual acquisition bandwidth. To overcome these restrictions, two approaches were developed. First, a large-aperture time lens, with higher-order dispersion compensation, is used to overcome the fundamental limit of the time-bandwidth product. Second, asynchronous optical sampling, based on two frequency combs, overcomes the technical limit of the acquisition bandwidth. As a result, in this study, time-stretch spectroscopy achieved a 1-pm spectral resolution, 24-nm observation bandwidth, and 1-kHz frame rate. Moreover, it was used to observe some spectral dynamics of the random lasing process and devices with narrow spectral widths. This scheme provides essential improvement for time-stretch spectroscopy to achieve high precision. | |
650 | 0 | 4 | |a article |
650 | 0 | 4 | |a bandwidth |
650 | 0 | 4 | |a compensation |
650 | 0 | 4 | |a spectroscopy |
700 | 1 | |a Chen, L. |e author | |
700 | 1 | |a Hu, H. |e author | |
700 | 1 | |a Li, L. |e author | |
700 | 1 | |a Li, Y. |e author | |
700 | 1 | |a Wang, D. |e author | |
700 | 1 | |a Yang, N. |e author | |
700 | 1 | |a Zhang, C. |e author | |
700 | 1 | |a Zhang, X. |e author | |
773 | |t Optics express |