Laser Self-Mixing Interferometer Based on Multiple Reflections and Phase-Modulation Technique
An improved method combining multiple reflections with the phase-modulation technique (MR-PM) is proposed to construct a self-mixing interferometer with high accuracy. The phase modulation is performed by using an electro-optic modulator that is placed in the external cavity. To broaden the harmonic...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/9/6/430 |
| _version_ | 1797483226994835456 |
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| author | Xiulin Wang Liping Lv Desheng Zhu Hanqiao Chen Wencai Huang |
| author_facet | Xiulin Wang Liping Lv Desheng Zhu Hanqiao Chen Wencai Huang |
| author_sort | Xiulin Wang |
| collection | DOAJ |
| description | An improved method combining multiple reflections with the phase-modulation technique (MR-PM) is proposed to construct a self-mixing interferometer with high accuracy. The phase modulation is performed by using an electro-optic modulator that is placed in the external cavity. To broaden the harmonic components spectrum of the self-mixing signal, the multiple-reflection technique is employed. By extracting orthogonal signals from the spectrum, phase demodulation is implemented to realize displacement reconstruction. The principle and signal processing approach are described in detail. A series of simulations and experiments indicate that the measurement accuracy of the system can be effectively improved with the increase in reflection times. The vibration with an amplitude of 44 nm has been proved to be measurable with a reconstruction error less than 3 nm. Due to the advantages of high accuracy and broad measurement range, the proposed method will play a significant role in the field of non-contact nanometer vibration measurement. |
| first_indexed | 2024-03-09T22:43:55Z |
| format | Article |
| id | doaj.art-d6856a54ae964182840c3b82bd51765a |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T22:43:55Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-d6856a54ae964182840c3b82bd51765a2023-11-23T18:33:27ZengMDPI AGPhotonics2304-67322022-06-019643010.3390/photonics9060430Laser Self-Mixing Interferometer Based on Multiple Reflections and Phase-Modulation TechniqueXiulin Wang0Liping Lv1Desheng Zhu2Hanqiao Chen3Wencai Huang4Department of Physics, Jimei University, Xiamen 361021, ChinaDepartment of Electronics Engineering, Xiamen University, Xiamen 361005, ChinaDepartment of Electronics Engineering, Xiamen University, Xiamen 361005, ChinaDepartment of Electronics Engineering, Xiamen University, Xiamen 361005, ChinaDepartment of Electronics Engineering, Xiamen University, Xiamen 361005, ChinaAn improved method combining multiple reflections with the phase-modulation technique (MR-PM) is proposed to construct a self-mixing interferometer with high accuracy. The phase modulation is performed by using an electro-optic modulator that is placed in the external cavity. To broaden the harmonic components spectrum of the self-mixing signal, the multiple-reflection technique is employed. By extracting orthogonal signals from the spectrum, phase demodulation is implemented to realize displacement reconstruction. The principle and signal processing approach are described in detail. A series of simulations and experiments indicate that the measurement accuracy of the system can be effectively improved with the increase in reflection times. The vibration with an amplitude of 44 nm has been proved to be measurable with a reconstruction error less than 3 nm. Due to the advantages of high accuracy and broad measurement range, the proposed method will play a significant role in the field of non-contact nanometer vibration measurement.https://www.mdpi.com/2304-6732/9/6/430phase modulationmultiple reflectionsself-mixing interferencemicro-displacement reconstruction |
| spellingShingle | Xiulin Wang Liping Lv Desheng Zhu Hanqiao Chen Wencai Huang Laser Self-Mixing Interferometer Based on Multiple Reflections and Phase-Modulation Technique Photonics phase modulation multiple reflections self-mixing interference micro-displacement reconstruction |
| title | Laser Self-Mixing Interferometer Based on Multiple Reflections and Phase-Modulation Technique |
| title_full | Laser Self-Mixing Interferometer Based on Multiple Reflections and Phase-Modulation Technique |
| title_fullStr | Laser Self-Mixing Interferometer Based on Multiple Reflections and Phase-Modulation Technique |
| title_full_unstemmed | Laser Self-Mixing Interferometer Based on Multiple Reflections and Phase-Modulation Technique |
| title_short | Laser Self-Mixing Interferometer Based on Multiple Reflections and Phase-Modulation Technique |
| title_sort | laser self mixing interferometer based on multiple reflections and phase modulation technique |
| topic | phase modulation multiple reflections self-mixing interference micro-displacement reconstruction |
| url | https://www.mdpi.com/2304-6732/9/6/430 |
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