Influence of Fluorescence to Photon Lifetime Ratio on Detection Sensitivity in Laser Self-Mixing Interferometry
Laser self-mixing interferometry (SMI) has been widely applied in the fields of precision measurement in scientific research, industry and biomedicine, and most researchers preferentially utilize laser diodes (LD) as light sources due to their compact structure and low cost. In most SMI cases, detec...
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8950170/ |
| _version_ | 1818624320704872448 |
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| author | Ke Kou Cuo Wang Jun Weng |
| author_facet | Ke Kou Cuo Wang Jun Weng |
| author_sort | Ke Kou |
| collection | DOAJ |
| description | Laser self-mixing interferometry (SMI) has been widely applied in the fields of precision measurement in scientific research, industry and biomedicine, and most researchers preferentially utilize laser diodes (LD) as light sources due to their compact structure and low cost. In most SMI cases, detection sensitivity rather than structure and cost is always the first concern. So in this article, we concentrate on an influencing factor on detection sensitivity named fluorescence to photon lifetime ratio (FPLR) which is an inherent parameter of the active material in a laser cavity. Derivation and simulation based on the time delayed rate equations are followed to validate the significant role played by the FPLR, then experiments according to different laser types including solid state lasers (SSL) and LDs are implemented to further prove the factor mentioned. Results demonstrate that SSLs always have higher detection sensitivity to feedback light than LDs, and is always more suitable to be applied in precision measurement. Additionally, the Yb:YAG laser is more sensitive than the Nd:YAG one. Increasing the pumping level from the threshold will decrease the SMI signal's sensitivity, and reducing laser feedback strength will also decrease the SMI signal's sensitivity. The findings from this article are beneficial to studying laser feedback sensitivity and selecting appropriate laser types in designing SMI sensors or instruments. Though with the disadvantages of large size and high cost, SSLs may be more suitable light sources in the field of high performance SMI sensing if miniaturization and cost are not the significant consideration. |
| first_indexed | 2024-12-16T18:55:05Z |
| format | Article |
| id | doaj.art-6a451411fcb94d72b7646865493dd576 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-16T18:55:05Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-6a451411fcb94d72b7646865493dd5762022-12-21T22:20:34ZengIEEEIEEE Access2169-35362020-01-018104261043210.1109/ACCESS.2020.29639888950170Influence of Fluorescence to Photon Lifetime Ratio on Detection Sensitivity in Laser Self-Mixing InterferometryKe Kou0https://orcid.org/0000-0003-1938-0958Cuo Wang1Jun Weng2School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an, ChinaSchool of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an, ChinaSchool of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an, ChinaLaser self-mixing interferometry (SMI) has been widely applied in the fields of precision measurement in scientific research, industry and biomedicine, and most researchers preferentially utilize laser diodes (LD) as light sources due to their compact structure and low cost. In most SMI cases, detection sensitivity rather than structure and cost is always the first concern. So in this article, we concentrate on an influencing factor on detection sensitivity named fluorescence to photon lifetime ratio (FPLR) which is an inherent parameter of the active material in a laser cavity. Derivation and simulation based on the time delayed rate equations are followed to validate the significant role played by the FPLR, then experiments according to different laser types including solid state lasers (SSL) and LDs are implemented to further prove the factor mentioned. Results demonstrate that SSLs always have higher detection sensitivity to feedback light than LDs, and is always more suitable to be applied in precision measurement. Additionally, the Yb:YAG laser is more sensitive than the Nd:YAG one. Increasing the pumping level from the threshold will decrease the SMI signal's sensitivity, and reducing laser feedback strength will also decrease the SMI signal's sensitivity. The findings from this article are beneficial to studying laser feedback sensitivity and selecting appropriate laser types in designing SMI sensors or instruments. Though with the disadvantages of large size and high cost, SSLs may be more suitable light sources in the field of high performance SMI sensing if miniaturization and cost are not the significant consideration.https://ieeexplore.ieee.org/document/8950170/Laser self-mixing interferometryfluorescence to photon lifetime ratiosensitivitysolid state laserlaser diode |
| spellingShingle | Ke Kou Cuo Wang Jun Weng Influence of Fluorescence to Photon Lifetime Ratio on Detection Sensitivity in Laser Self-Mixing Interferometry IEEE Access Laser self-mixing interferometry fluorescence to photon lifetime ratio sensitivity solid state laser laser diode |
| title | Influence of Fluorescence to Photon Lifetime Ratio on Detection Sensitivity in Laser Self-Mixing Interferometry |
| title_full | Influence of Fluorescence to Photon Lifetime Ratio on Detection Sensitivity in Laser Self-Mixing Interferometry |
| title_fullStr | Influence of Fluorescence to Photon Lifetime Ratio on Detection Sensitivity in Laser Self-Mixing Interferometry |
| title_full_unstemmed | Influence of Fluorescence to Photon Lifetime Ratio on Detection Sensitivity in Laser Self-Mixing Interferometry |
| title_short | Influence of Fluorescence to Photon Lifetime Ratio on Detection Sensitivity in Laser Self-Mixing Interferometry |
| title_sort | influence of fluorescence to photon lifetime ratio on detection sensitivity in laser self mixing interferometry |
| topic | Laser self-mixing interferometry fluorescence to photon lifetime ratio sensitivity solid state laser laser diode |
| url | https://ieeexplore.ieee.org/document/8950170/ |
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