Non-contact sub-nanometer displacement sensing based on optical digital coherent detection using frequency-domain filters
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- Wang Jingwen
- School of Mechanical and Electrical Engineering, Sanming University
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- Hong Jiang
- School of Mechanical and Electrical Engineering, Sanming University
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- Wang Xiaoyan
- School of Mechanical and Electrical Engineering, Sanming University
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- Zheng Lianhui
- School of Mechanical and Electrical Engineering, Sanming University
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- Ren Wen
- School of Mechanical and Electrical Engineering, Sanming University
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- Yan Huixian
- School of Mechanical and Electrical Engineering, Sanming University
抄録
<p>We have introduced a sub-nanometer non-contact displacement sensing method using phase-diversity optical digital coherent detection. The initial work achieved 0.62nm displacement sensing with a 0.21nm resolution using a temporal domain filter. However, optimizing the filter for a sharp transition band and low order posed challenges, limiting noise filtering. To overcome this, frequency-domain filter is proposed and investigated in this work. Employing a frequency-domain bandpass filter improved resolution to 0.07nm at 0.62nm displacement, resulting in an 18.5dB signal-to-noise ratio--8dB higher than temporal domain filtering. This advancement enhances precision for applications in precision instruments without any additional cost.</p>
収録刊行物
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- IEICE Electronics Express
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IEICE Electronics Express 21 (9), 20240089-20240089, 2024-05-10
一般社団法人 電子情報通信学会
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詳細情報 詳細情報について
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- CRID
- 1390863041926260608
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- ISSN
- 13492543
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
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- 抄録ライセンスフラグ
- 使用不可