Spatial Resolution Enhancement Based on Peak Splitting in Low-Coherence Interferometry Signal
Low-coherence interferometry (LCI) has been a useful tool to detect distributed polarization coupling (DPC) points in polarization-maintaining fiber (PMF). However, due to birefringence dispersion, two close coupling points in long PMF are usually difficult to be distinguished. A novel method in our...
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| Format: | Article |
| Language: | English |
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IEEE
2016-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/7488277/ |
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| author | Hongxia Zhang Feng Wang Chongxiang Zeng Yaguang Ren Dagong Jia Tiegen Liu |
| author_facet | Hongxia Zhang Feng Wang Chongxiang Zeng Yaguang Ren Dagong Jia Tiegen Liu |
| author_sort | Hongxia Zhang |
| collection | DOAJ |
| description | Low-coherence interferometry (LCI) has been a useful tool to detect distributed polarization coupling (DPC) points in polarization-maintaining fiber (PMF). However, due to birefringence dispersion, two close coupling points in long PMF are usually difficult to be distinguished. A novel method in our paper has been presented to tackle the problem. When the product of birefringence dispersion and fiber length called accumulated dispersion (AD) is numerically enough, the coherence envelopes caused by two close coupling points will split into periodic multiple peaks in the overlapping region, and the distance of the two coupling points can be further demodulated from the frequency of splitting peaks. An experimental setup based on LCI has been established with two Panda PMFs of 600 and 950 m under test. Experimental results show that the measuring errors of two close coupling points distance were less than 5%. When AD reached as high as 29 and 46 fs/nm, the spatial resolution was increased by 13-fold and 20-fold, respectively. The constraint conditions to ensure the appearance of peak splitting are also discussed. It indicates that our method may show a potential application of spatial resolution enhancement in high dispersive LCI without dispersion compensation. |
| format | Article |
| id | doaj-art-94a6fad34fce40f88fdec238343ce67d |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-94a6fad34fce40f88fdec238343ce67d2025-08-20T03:32:50ZengIEEEIEEE Photonics Journal1943-06552016-01-01841810.1109/JPHOT.2016.25789407488277Spatial Resolution Enhancement Based on Peak Splitting in Low-Coherence Interferometry SignalHongxia Zhang0Feng Wang1Chongxiang Zeng2Yaguang Ren3Dagong Jia4Tiegen Liu5College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, ChinaCollege of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, ChinaCollege of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, ChinaCollege of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, ChinaCollege of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, ChinaCollege of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, ChinaLow-coherence interferometry (LCI) has been a useful tool to detect distributed polarization coupling (DPC) points in polarization-maintaining fiber (PMF). However, due to birefringence dispersion, two close coupling points in long PMF are usually difficult to be distinguished. A novel method in our paper has been presented to tackle the problem. When the product of birefringence dispersion and fiber length called accumulated dispersion (AD) is numerically enough, the coherence envelopes caused by two close coupling points will split into periodic multiple peaks in the overlapping region, and the distance of the two coupling points can be further demodulated from the frequency of splitting peaks. An experimental setup based on LCI has been established with two Panda PMFs of 600 and 950 m under test. Experimental results show that the measuring errors of two close coupling points distance were less than 5%. When AD reached as high as 29 and 46 fs/nm, the spatial resolution was increased by 13-fold and 20-fold, respectively. The constraint conditions to ensure the appearance of peak splitting are also discussed. It indicates that our method may show a potential application of spatial resolution enhancement in high dispersive LCI without dispersion compensation.https://ieeexplore.ieee.org/document/7488277/Low coherence interferometryFiber optics systemsBirefringenceMetrologyOptical properties of photonic materialsPolarization maintaining fiber |
| spellingShingle | Hongxia Zhang Feng Wang Chongxiang Zeng Yaguang Ren Dagong Jia Tiegen Liu Spatial Resolution Enhancement Based on Peak Splitting in Low-Coherence Interferometry Signal IEEE Photonics Journal Low coherence interferometry Fiber optics systems Birefringence Metrology Optical properties of photonic materials Polarization maintaining fiber |
| title | Spatial Resolution Enhancement Based on Peak Splitting in Low-Coherence Interferometry Signal |
| title_full | Spatial Resolution Enhancement Based on Peak Splitting in Low-Coherence Interferometry Signal |
| title_fullStr | Spatial Resolution Enhancement Based on Peak Splitting in Low-Coherence Interferometry Signal |
| title_full_unstemmed | Spatial Resolution Enhancement Based on Peak Splitting in Low-Coherence Interferometry Signal |
| title_short | Spatial Resolution Enhancement Based on Peak Splitting in Low-Coherence Interferometry Signal |
| title_sort | spatial resolution enhancement based on peak splitting in low coherence interferometry signal |
| topic | Low coherence interferometry Fiber optics systems Birefringence Metrology Optical properties of photonic materials Polarization maintaining fiber |
| url | https://ieeexplore.ieee.org/document/7488277/ |
| work_keys_str_mv | AT hongxiazhang spatialresolutionenhancementbasedonpeaksplittinginlowcoherenceinterferometrysignal AT fengwang spatialresolutionenhancementbasedonpeaksplittinginlowcoherenceinterferometrysignal AT chongxiangzeng spatialresolutionenhancementbasedonpeaksplittinginlowcoherenceinterferometrysignal AT yaguangren spatialresolutionenhancementbasedonpeaksplittinginlowcoherenceinterferometrysignal AT dagongjia spatialresolutionenhancementbasedonpeaksplittinginlowcoherenceinterferometrysignal AT tiegenliu spatialresolutionenhancementbasedonpeaksplittinginlowcoherenceinterferometrysignal |