Anmerkung : Demodulation of spectral signal modulated by optical chopper with unstable modulation frequency
When an optical chopper is used to modulate the light source, the rotating speed of the wheel may vary with time and subsequently cause jitter of the modulation frequency. The amplitude calculated from the modulated signal would be distorted when the frequency fluctuations occur. To precisely calculate the amplitude of the modulated light flux, we proposed a method to estimate the range of the frequency fluctuation in the measurement of the spectrum and then extract the amplitude based on the sum of power of the signal in the selected frequency range. Experiments were designed to test the feasibility of the proposed method and the results showed lower root means square error than the conventional way.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2017 |
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| Erschienen: |
2017 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:88 |
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| Enthalten in: |
The Review of scientific instruments - 88(2017), 10 vom: 02. Okt., Seite 106104 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhang, Shengzhao [VerfasserIn] |
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| Links: |
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| Themen: |
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| Anmerkungen: |
Date Completed 05.02.2018 Date Revised 05.02.2018 published: Print Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1063/1.5000416 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM277598370 |
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| 100 | 1 | |a Zhang, Shengzhao |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Note |b Demodulation of spectral signal modulated by optical chopper with unstable modulation frequency |
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| 500 | |a Date Completed 05.02.2018 | ||
| 500 | |a Date Revised 05.02.2018 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a When an optical chopper is used to modulate the light source, the rotating speed of the wheel may vary with time and subsequently cause jitter of the modulation frequency. The amplitude calculated from the modulated signal would be distorted when the frequency fluctuations occur. To precisely calculate the amplitude of the modulated light flux, we proposed a method to estimate the range of the frequency fluctuation in the measurement of the spectrum and then extract the amplitude based on the sum of power of the signal in the selected frequency range. Experiments were designed to test the feasibility of the proposed method and the results showed lower root means square error than the conventional way | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Li, Gang |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Jiexi |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Donggen |e verfasserin |4 aut | |
| 700 | 1 | |a Han, Ying |e verfasserin |4 aut | |
| 700 | 1 | |a Cao, Hui |e verfasserin |4 aut | |
| 700 | 1 | |a Lin, Ling |e verfasserin |4 aut | |
| 700 | 1 | |a Diao, Chunhong |e verfasserin |4 aut | |
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