Pub Date : 2017-12-01DOI: 10.1109/ICOCN.2017.8121594
C. Mou, Zhijun Yan, K. Zhou, Lin Zhang
45° tilted fiber grating (TFG) possesses a series of merits, such as strong polarization dependant loss (PDL), low insertion loss, superior compatibility, and compactness. One of the most prominent features of such polarizing device is the all-fiber structure. This polarizing element plays an important role in all-fiber integrated systems which have been widely investigated in the last two decades. In this report, we reviewed the recent development in single wavelength, multiple wavelength, Q-switched, and mode locked fiber lasers based on the 45°TFG as in-fiber polarizer.
{"title":"Erbium doped fiber lasers based on 45° tilted fiber gratings","authors":"C. Mou, Zhijun Yan, K. Zhou, Lin Zhang","doi":"10.1109/ICOCN.2017.8121594","DOIUrl":"https://doi.org/10.1109/ICOCN.2017.8121594","url":null,"abstract":"45° tilted fiber grating (TFG) possesses a series of merits, such as strong polarization dependant loss (PDL), low insertion loss, superior compatibility, and compactness. One of the most prominent features of such polarizing device is the all-fiber structure. This polarizing element plays an important role in all-fiber integrated systems which have been widely investigated in the last two decades. In this report, we reviewed the recent development in single wavelength, multiple wavelength, Q-switched, and mode locked fiber lasers based on the 45°TFG as in-fiber polarizer.","PeriodicalId":131479,"journal":{"name":"2017 16th International Conference on Optical Communications and Networks (ICOCN)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121660281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-12-01DOI: 10.1109/ICOCN.2017.8121424
F. Wen, C. Tsekrekos, Xingyu Zhou, Baojian Wu, Mingyue Zhu, Jing Zhang, K. Qiu, S. Turitsyn, S. Sygletos
An all-optical multilevel amplitude regenerator is optimized based on the transmission response of a nonlinear optical loop mirror (NOLM). Three regenerative regions defined by the power-transfer-function (PTF) slope of less than 1 are obtained, and noise suppression is shown for a PAM4 signal. Using amplitude dithering we were able to experimentally characterize the transfer function slope and confirm the theoretical predictions.
{"title":"All-optical multilevel regeneration in nonlinear optical loop mirror","authors":"F. Wen, C. Tsekrekos, Xingyu Zhou, Baojian Wu, Mingyue Zhu, Jing Zhang, K. Qiu, S. Turitsyn, S. Sygletos","doi":"10.1109/ICOCN.2017.8121424","DOIUrl":"https://doi.org/10.1109/ICOCN.2017.8121424","url":null,"abstract":"An all-optical multilevel amplitude regenerator is optimized based on the transmission response of a nonlinear optical loop mirror (NOLM). Three regenerative regions defined by the power-transfer-function (PTF) slope of less than 1 are obtained, and noise suppression is shown for a PAM4 signal. Using amplitude dithering we were able to experimentally characterize the transfer function slope and confirm the theoretical predictions.","PeriodicalId":131479,"journal":{"name":"2017 16th International Conference on Optical Communications and Networks (ICOCN)","volume":"881 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123033503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-12-01DOI: 10.1109/ICOCN.2017.8121208
Jie Wang, Hongdan Wan, Yu Cai, Zuxing Zhang, B. Sun, Lin Zhang
We propose and demonstrate an all-fiber passively mode-locked laser with pulsed cylindrical vector beam output based on a mode selective coupler (MSC) in a figure-8 cavity, The MSC made of a two mode fiber and a standard single mode fiber is used as both the intracavity transverse mode converter and mode splitter. Through adjusting the polarization state in the laser cavity, both radially and azimuthally polarized beams have been obtained with high mode purity which are measured to be > 94%. The mode-locked laser pulses have duration of 17 ns and a repetition rate of 0.66 MHz, operating near a wavelength of 1556.3 nm with a spectral bandwidth of 3.2 nm.
{"title":"A mode-locked fiber laser generating high purity cylindrical vector beams based on a mode selective coupler in a figure-8 cavity","authors":"Jie Wang, Hongdan Wan, Yu Cai, Zuxing Zhang, B. Sun, Lin Zhang","doi":"10.1109/ICOCN.2017.8121208","DOIUrl":"https://doi.org/10.1109/ICOCN.2017.8121208","url":null,"abstract":"We propose and demonstrate an all-fiber passively mode-locked laser with pulsed cylindrical vector beam output based on a mode selective coupler (MSC) in a figure-8 cavity, The MSC made of a two mode fiber and a standard single mode fiber is used as both the intracavity transverse mode converter and mode splitter. Through adjusting the polarization state in the laser cavity, both radially and azimuthally polarized beams have been obtained with high mode purity which are measured to be > 94%. The mode-locked laser pulses have duration of 17 ns and a repetition rate of 0.66 MHz, operating near a wavelength of 1556.3 nm with a spectral bandwidth of 3.2 nm.","PeriodicalId":131479,"journal":{"name":"2017 16th International Conference on Optical Communications and Networks (ICOCN)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134206444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-12-01DOI: 10.1109/ICOCN.2017.8121195
Qianqian Huang, Tianxing Wang, Zhijun Yan, Chuanhang Zou, K. Zhou, Lin Zhang, C. Mou
We demonstrate a dispersion managed Erbium doped all-fiber laser with 101.75MHz repetition rate using 45°TFG to realize mode locking based on nonlinear polarization rotation technique. In our experiment, stable dual-pulse tightly bound states were observed under the pump power of505mW.
{"title":"Dual pulse bound states in a dispersion-managed mode-locked all-fiber laser with 101.75MHz repetition rate using 45° tilted fiber grating","authors":"Qianqian Huang, Tianxing Wang, Zhijun Yan, Chuanhang Zou, K. Zhou, Lin Zhang, C. Mou","doi":"10.1109/ICOCN.2017.8121195","DOIUrl":"https://doi.org/10.1109/ICOCN.2017.8121195","url":null,"abstract":"We demonstrate a dispersion managed Erbium doped all-fiber laser with 101.75MHz repetition rate using 45°TFG to realize mode locking based on nonlinear polarization rotation technique. In our experiment, stable dual-pulse tightly bound states were observed under the pump power of505mW.","PeriodicalId":131479,"journal":{"name":"2017 16th International Conference on Optical Communications and Networks (ICOCN)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124173124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-12-01DOI: 10.1109/ICOCN.2017.8121457
Chuanhang Zou, Tianxing Wang, Zhijun Yan, Qianqian Huang, M. Alaraimi, A. Rozhin, C. Mou
A wavelength-tunable Erbium-doped fiber laser with birefringence-enhanced cavity is proposed. A 45° tiled fiber grating (45°TFG) and a section of polarization maintaining (PM) fiber are placed between two two polarization controllers (PCs). Two PCs and PM fiber are employed to enhance the birefringence effect. The 45° TFG plays the role of an in-fiber polarizer. The fiber laser is mode-locked by single walled carbon nanotube polyvinyl alcohol (SWCNTs-PVA) composite film. Central wavelength of the fiber laser can be tuned from 1552.52nm to 1575.28nm with a tuning range of 22.76nm. The demonstrated laser provided the widest tuning range in a high repetition rate all-fiber Erbium doped laser based on SWCNT.
{"title":"Wavelength-tunable mode-locked fiber laser with birefringence-enhanced cavity","authors":"Chuanhang Zou, Tianxing Wang, Zhijun Yan, Qianqian Huang, M. Alaraimi, A. Rozhin, C. Mou","doi":"10.1109/ICOCN.2017.8121457","DOIUrl":"https://doi.org/10.1109/ICOCN.2017.8121457","url":null,"abstract":"A wavelength-tunable Erbium-doped fiber laser with birefringence-enhanced cavity is proposed. A 45° tiled fiber grating (45°TFG) and a section of polarization maintaining (PM) fiber are placed between two two polarization controllers (PCs). Two PCs and PM fiber are employed to enhance the birefringence effect. The 45° TFG plays the role of an in-fiber polarizer. The fiber laser is mode-locked by single walled carbon nanotube polyvinyl alcohol (SWCNTs-PVA) composite film. Central wavelength of the fiber laser can be tuned from 1552.52nm to 1575.28nm with a tuning range of 22.76nm. The demonstrated laser provided the widest tuning range in a high repetition rate all-fiber Erbium doped laser based on SWCNT.","PeriodicalId":131479,"journal":{"name":"2017 16th International Conference on Optical Communications and Networks (ICOCN)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116670438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-12-01DOI: 10.1109/ICOCN.2017.8121385
Meng Huang, B. Sun, Wei Wei, Hongdan Wan, Zuxing Zhang, Lin Zhang
A high-quality nanolayer graphene (NLG) coated hollow core fiber (HCF) platform has been demonstrated for accurate monitoring of refractive index (RI) changes so far mainly operate in liquids but not in air. The NLG with high index is deposited on the outer surface of the HCF, and an enhanced anti-resonant reflecting guidance is formed, which induces sharp periodic lossy dips in the transmission spectrum. A cute experiment conducted interrogating the transmission intensity of the lossy dip demonstrates a high resolution of 2.73×10−6 RIU and a sensitivity of −365.9 dB/RIU, which is two or three times higher than that of intensity-modulated RI sensors reported previously. We believe that this configuration opens research directions for highly sensitive sensing in researches of chemistry, medicine, and biology.
{"title":"Ultrasensitive refractive index sensor based on graphene coated hollow core fiber","authors":"Meng Huang, B. Sun, Wei Wei, Hongdan Wan, Zuxing Zhang, Lin Zhang","doi":"10.1109/ICOCN.2017.8121385","DOIUrl":"https://doi.org/10.1109/ICOCN.2017.8121385","url":null,"abstract":"A high-quality nanolayer graphene (NLG) coated hollow core fiber (HCF) platform has been demonstrated for accurate monitoring of refractive index (RI) changes so far mainly operate in liquids but not in air. The NLG with high index is deposited on the outer surface of the HCF, and an enhanced anti-resonant reflecting guidance is formed, which induces sharp periodic lossy dips in the transmission spectrum. A cute experiment conducted interrogating the transmission intensity of the lossy dip demonstrates a high resolution of 2.73×10−6 RIU and a sensitivity of −365.9 dB/RIU, which is two or three times higher than that of intensity-modulated RI sensors reported previously. We believe that this configuration opens research directions for highly sensitive sensing in researches of chemistry, medicine, and biology.","PeriodicalId":131479,"journal":{"name":"2017 16th International Conference on Optical Communications and Networks (ICOCN)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134425091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-12-01DOI: 10.1109/ICOCN.2017.8121392
Pengcheng Chen, X. Shu, H. Cao, K. Sugden
Most sensors have the tradeoff dilemma of high sensitivity and large dynamic range. We demonstrate here an all-fiber refractive index sensor based on a composite intrinsic Fabry-Perot interferometer (FPI), which possesses the co-existence advantages of high sensitivity and large dynamic range. Experimental trends are in good agreement with the theoretical predictions. The co-existence of high sensitivity and large dynamic range in a composite FPI is of great significance to practical refractive index measurement.
{"title":"High-sensitivity and large-dynamic-range fiber refractometer based on composite-cavity Fabry-Perot structure","authors":"Pengcheng Chen, X. Shu, H. Cao, K. Sugden","doi":"10.1109/ICOCN.2017.8121392","DOIUrl":"https://doi.org/10.1109/ICOCN.2017.8121392","url":null,"abstract":"Most sensors have the tradeoff dilemma of high sensitivity and large dynamic range. We demonstrate here an all-fiber refractive index sensor based on a composite intrinsic Fabry-Perot interferometer (FPI), which possesses the co-existence advantages of high sensitivity and large dynamic range. Experimental trends are in good agreement with the theoretical predictions. The co-existence of high sensitivity and large dynamic range in a composite FPI is of great significance to practical refractive index measurement.","PeriodicalId":131479,"journal":{"name":"2017 16th International Conference on Optical Communications and Networks (ICOCN)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130371173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-08-01DOI: 10.1109/ICOCN.2017.8121270
Ming-Fu Zhao, Hai-feng Chen, Tao Song, Sixing Deng
In order to reduce the false matching rate and matching time, an improved algorithm based on RANSAC-SIFT was proposed. The feature points were extracted by SIFT algorithm firstly. Then most of the mismatching points were eliminated according to the constraints that matching distances tend to be consistent. Finally the remaining points were regarded as pre matching points for achieve fine matching with RANSAC algorithm. The experimental results show that the improved RANSAC algorithm has much improved the matching accuracy and compression matching time.
{"title":"Research on image matching based on improved RANSAC-SIFT algorithm","authors":"Ming-Fu Zhao, Hai-feng Chen, Tao Song, Sixing Deng","doi":"10.1109/ICOCN.2017.8121270","DOIUrl":"https://doi.org/10.1109/ICOCN.2017.8121270","url":null,"abstract":"In order to reduce the false matching rate and matching time, an improved algorithm based on RANSAC-SIFT was proposed. The feature points were extracted by SIFT algorithm firstly. Then most of the mismatching points were eliminated according to the constraints that matching distances tend to be consistent. Finally the remaining points were regarded as pre matching points for achieve fine matching with RANSAC algorithm. The experimental results show that the improved RANSAC algorithm has much improved the matching accuracy and compression matching time.","PeriodicalId":131479,"journal":{"name":"2017 16th International Conference on Optical Communications and Networks (ICOCN)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124276193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We propose and demonstrate a cascaded-cavities Fabry-Perot interferometer (FPI) for simultaneous measurement of pressure and temperature based on photonic crystal fiber. The sensor is composed of cascaded air-cavity and silica-cavity. The air-cavity and silica-cavity are both sensitive to temperature and pressure because of the thermo-optic coefficient and Young's modulus. We can obtain the pressure sensitivity and the temperature sensitivity of each cavity by band-pass filtering of the sensor spectrum in the frequency domain. Therefore the proposed sensor can simultaneously measure the pressure and temperature without pressure-temperature cross-talk. The proposed sensor has a compact and all-fiber structure, while the fabrication process of the cascaded FPI sensor is easy with just a few steps of splicing and cleaving.
{"title":"Open-cavity Fabry-Perot interferometer pressure and temperature fiber sensor based on photonic crystal fiber","authors":"Yuzhu Jiao, Xiaolong Dong, Qi Fu, Zhigang Li, Jiajun Tian, Yong Yao","doi":"10.1109/ICOCN.2017.8121315","DOIUrl":"https://doi.org/10.1109/ICOCN.2017.8121315","url":null,"abstract":"We propose and demonstrate a cascaded-cavities Fabry-Perot interferometer (FPI) for simultaneous measurement of pressure and temperature based on photonic crystal fiber. The sensor is composed of cascaded air-cavity and silica-cavity. The air-cavity and silica-cavity are both sensitive to temperature and pressure because of the thermo-optic coefficient and Young's modulus. We can obtain the pressure sensitivity and the temperature sensitivity of each cavity by band-pass filtering of the sensor spectrum in the frequency domain. Therefore the proposed sensor can simultaneously measure the pressure and temperature without pressure-temperature cross-talk. The proposed sensor has a compact and all-fiber structure, while the fabrication process of the cascaded FPI sensor is easy with just a few steps of splicing and cleaving.","PeriodicalId":131479,"journal":{"name":"2017 16th International Conference on Optical Communications and Networks (ICOCN)","volume":"72 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120871573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-08-01DOI: 10.1109/ICOCN.2017.8121302
Tingting Zhang, Yubin Wei, Zhaowei Wang, Tong-yu Liu
Ethylene is one of the important signature gases in spontaneous combustion forecasting of coal goaf area. It is very important to detect the concentration of ethylene accurately. However, the absorption spectrum of the other interfering gases is always in the ethylene spectrum during the ethylene detecting, which has a great impact on the ethylene's accuracy. In this paper, a spectral correction method is presented to extract pure ethylene spectra. The experiments show that the detection accuracy is improved by nearly 10 times by using this method, so realized the high accuracy detection of ethylene.
{"title":"Method of spectrum correction in ethylene detection based on TDLAS","authors":"Tingting Zhang, Yubin Wei, Zhaowei Wang, Tong-yu Liu","doi":"10.1109/ICOCN.2017.8121302","DOIUrl":"https://doi.org/10.1109/ICOCN.2017.8121302","url":null,"abstract":"Ethylene is one of the important signature gases in spontaneous combustion forecasting of coal goaf area. It is very important to detect the concentration of ethylene accurately. However, the absorption spectrum of the other interfering gases is always in the ethylene spectrum during the ethylene detecting, which has a great impact on the ethylene's accuracy. In this paper, a spectral correction method is presented to extract pure ethylene spectra. The experiments show that the detection accuracy is improved by nearly 10 times by using this method, so realized the high accuracy detection of ethylene.","PeriodicalId":131479,"journal":{"name":"2017 16th International Conference on Optical Communications and Networks (ICOCN)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125906799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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