Improved PGC demodulation algorithm to eliminate modulation depth and intensity disturbance
In this paper, an improved phase generated carrier (PGC) demodulation algorithm based on frequency mixing and division difference is proposed. The effects of phase modulation depth variation and light intensity disturbance of the light source on the demodulated phase signal are investigated theoreti...
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| Veröffentlicht in: | Applied optics (2004) 2022-07, Vol.61 (19), p.5722-5727 |
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| container_issue | 19 |
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| container_title | Applied optics (2004) |
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| creator | Li, Yangtaozi Gao, Hong Zhao, Liguo Fu, Zhipeng Zhang, Juan Li, Zhen Qiao, Xueguang |
| description | In this paper, an improved phase generated carrier (PGC) demodulation algorithm based on frequency mixing and division difference is proposed. The effects of phase modulation depth variation and light intensity disturbance of the light source on the demodulated phase signal are investigated theoretically and experimentally. Compared to the traditional PGC differential-cross-multiplying (PGC-DCM) and PGC arctangent (PGC-Arctan) demodulation algorithms, the ameliorated demodulation algorithm eliminates the harmonic distortion of the demodulated signal by extracting the carrier modulation depth through frequency mixing. The demodulation error caused by the light intensity disturbance of the light source is suppressed by division difference. The stability of the demodulation system is improved. To verify the algorithm, a PGC demodulation system is built based on a Michelson interferometer. The experimental results show that when the frequency and amplitude of the sensed signal are set to 1 kHz and 0.4 rad, respectively, the signal-to-noise ratio with the proposed algorithm achieves a gain of 35.66 dB over the PGC-Arctan algorithm and 26.26 dB over the PGC-DCM algorithm. |
| doi_str_mv | 10.1364/AO.459267 |
| format | Article |
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The effects of phase modulation depth variation and light intensity disturbance of the light source on the demodulated phase signal are investigated theoretically and experimentally. Compared to the traditional PGC differential-cross-multiplying (PGC-DCM) and PGC arctangent (PGC-Arctan) demodulation algorithms, the ameliorated demodulation algorithm eliminates the harmonic distortion of the demodulated signal by extracting the carrier modulation depth through frequency mixing. The demodulation error caused by the light intensity disturbance of the light source is suppressed by division difference. The stability of the demodulation system is improved. To verify the algorithm, a PGC demodulation system is built based on a Michelson interferometer. The experimental results show that when the frequency and amplitude of the sensed signal are set to 1 kHz and 0.4 rad, respectively, the signal-to-noise ratio with the proposed algorithm achieves a gain of 35.66 dB over the PGC-Arctan algorithm and 26.26 dB over the PGC-DCM algorithm.</description><identifier>ISSN: 1559-128X</identifier><identifier>EISSN: 2155-3165</identifier><identifier>EISSN: 1539-4522</identifier><identifier>DOI: 10.1364/AO.459267</identifier><language>eng</language><publisher>Washington: Optical Society of America</publisher><subject>Algorithms ; Demodulation ; Harmonic distortion ; Light sources ; Luminous intensity ; Michelson interferometers ; Phase modulation ; Signal to noise ratio</subject><ispartof>Applied optics (2004), 2022-07, Vol.61 (19), p.5722-5727</ispartof><rights>Copyright Optical Society of America Jul 1, 2022</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c290t-b2bb84c6ada966a2d0f61f99075c89369a7385e4856d775a1f0dfa3de0065c0c3</citedby><cites>FETCH-LOGICAL-c290t-b2bb84c6ada966a2d0f61f99075c89369a7385e4856d775a1f0dfa3de0065c0c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,3244,27903,27904</link.rule.ids></links><search><creatorcontrib>Li, Yangtaozi</creatorcontrib><creatorcontrib>Gao, Hong</creatorcontrib><creatorcontrib>Zhao, Liguo</creatorcontrib><creatorcontrib>Fu, Zhipeng</creatorcontrib><creatorcontrib>Zhang, Juan</creatorcontrib><creatorcontrib>Li, Zhen</creatorcontrib><creatorcontrib>Qiao, Xueguang</creatorcontrib><title>Improved PGC demodulation algorithm to eliminate modulation depth and intensity disturbance</title><title>Applied optics (2004)</title><description>In this paper, an improved phase generated carrier (PGC) demodulation algorithm based on frequency mixing and division difference is proposed. The effects of phase modulation depth variation and light intensity disturbance of the light source on the demodulated phase signal are investigated theoretically and experimentally. Compared to the traditional PGC differential-cross-multiplying (PGC-DCM) and PGC arctangent (PGC-Arctan) demodulation algorithms, the ameliorated demodulation algorithm eliminates the harmonic distortion of the demodulated signal by extracting the carrier modulation depth through frequency mixing. The demodulation error caused by the light intensity disturbance of the light source is suppressed by division difference. The stability of the demodulation system is improved. To verify the algorithm, a PGC demodulation system is built based on a Michelson interferometer. The experimental results show that when the frequency and amplitude of the sensed signal are set to 1 kHz and 0.4 rad, respectively, the signal-to-noise ratio with the proposed algorithm achieves a gain of 35.66 dB over the PGC-Arctan algorithm and 26.26 dB over the PGC-DCM algorithm.</description><subject>Algorithms</subject><subject>Demodulation</subject><subject>Harmonic distortion</subject><subject>Light sources</subject><subject>Luminous intensity</subject><subject>Michelson interferometers</subject><subject>Phase modulation</subject><subject>Signal to noise ratio</subject><issn>1559-128X</issn><issn>2155-3165</issn><issn>1539-4522</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNpd0M1KAzEUBeAgCtbqwjcIuNHF1PxMMpNlKVoLhbpQEFyETJKxKTNJTTJC396RuhBX9y4-DvceAK4xmmHKy_v5ZlYyQXh1AiYEM1ZQzNkpmIyrKDCp387BRUo7hCgrRTUB76t-H8OXNfB5uYDG9sEMncoueKi6jxBd3vYwB2g71zuvsoV_hLH7vIXKG-h8tj65fIDGpTzERnltL8FZq7pkr37nFLw-Prwsnor1ZrlazNeFJgLloiFNU5eaK6ME54oY1HLcCoEqpmtBuVAVrZkta8ZNVTGFW2RaRY1FiDONNJ2C22Pu-MnnYFOWvUvadp3yNgxJkoowzhCmdKQ3_-guDNGP10nC65KgWnAyqruj0jGkFG0r99H1Kh4kRvKnZjnfyGPN9BubvW_T</recordid><startdate>20220701</startdate><enddate>20220701</enddate><creator>Li, Yangtaozi</creator><creator>Gao, Hong</creator><creator>Zhao, Liguo</creator><creator>Fu, Zhipeng</creator><creator>Zhang, Juan</creator><creator>Li, Zhen</creator><creator>Qiao, Xueguang</creator><general>Optical Society of America</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7X8</scope></search><sort><creationdate>20220701</creationdate><title>Improved PGC demodulation algorithm to eliminate modulation depth and intensity disturbance</title><author>Li, Yangtaozi ; Gao, Hong ; Zhao, Liguo ; Fu, Zhipeng ; Zhang, Juan ; Li, Zhen ; Qiao, Xueguang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c290t-b2bb84c6ada966a2d0f61f99075c89369a7385e4856d775a1f0dfa3de0065c0c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Algorithms</topic><topic>Demodulation</topic><topic>Harmonic distortion</topic><topic>Light sources</topic><topic>Luminous intensity</topic><topic>Michelson interferometers</topic><topic>Phase modulation</topic><topic>Signal to noise ratio</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Yangtaozi</creatorcontrib><creatorcontrib>Gao, Hong</creatorcontrib><creatorcontrib>Zhao, Liguo</creatorcontrib><creatorcontrib>Fu, Zhipeng</creatorcontrib><creatorcontrib>Zhang, Juan</creatorcontrib><creatorcontrib>Li, Zhen</creatorcontrib><creatorcontrib>Qiao, Xueguang</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Applied optics (2004)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Yangtaozi</au><au>Gao, Hong</au><au>Zhao, Liguo</au><au>Fu, Zhipeng</au><au>Zhang, Juan</au><au>Li, Zhen</au><au>Qiao, Xueguang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Improved PGC demodulation algorithm to eliminate modulation depth and intensity disturbance</atitle><jtitle>Applied optics (2004)</jtitle><date>2022-07-01</date><risdate>2022</risdate><volume>61</volume><issue>19</issue><spage>5722</spage><epage>5727</epage><pages>5722-5727</pages><issn>1559-128X</issn><eissn>2155-3165</eissn><eissn>1539-4522</eissn><abstract>In this paper, an improved phase generated carrier (PGC) demodulation algorithm based on frequency mixing and division difference is proposed. The effects of phase modulation depth variation and light intensity disturbance of the light source on the demodulated phase signal are investigated theoretically and experimentally. Compared to the traditional PGC differential-cross-multiplying (PGC-DCM) and PGC arctangent (PGC-Arctan) demodulation algorithms, the ameliorated demodulation algorithm eliminates the harmonic distortion of the demodulated signal by extracting the carrier modulation depth through frequency mixing. The demodulation error caused by the light intensity disturbance of the light source is suppressed by division difference. The stability of the demodulation system is improved. To verify the algorithm, a PGC demodulation system is built based on a Michelson interferometer. The experimental results show that when the frequency and amplitude of the sensed signal are set to 1 kHz and 0.4 rad, respectively, the signal-to-noise ratio with the proposed algorithm achieves a gain of 35.66 dB over the PGC-Arctan algorithm and 26.26 dB over the PGC-DCM algorithm.</abstract><cop>Washington</cop><pub>Optical Society of America</pub><doi>10.1364/AO.459267</doi><tpages>6</tpages></addata></record> |
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| identifier | ISSN: 1559-128X |
| ispartof | Applied optics (2004), 2022-07, Vol.61 (19), p.5722-5727 |
| issn | 1559-128X 2155-3165 1539-4522 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_2725650133 |
| source | Alma/SFX Local Collection; Optica Publishing Group Journals |
| subjects | Algorithms Demodulation Harmonic distortion Light sources Luminous intensity Michelson interferometers Phase modulation Signal to noise ratio |
| title | Improved PGC demodulation algorithm to eliminate modulation depth and intensity disturbance |
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