Pub Date : 2018-10-01DOI: 10.1109/MWP.2018.8552859
F. Duport, Carmen Gomez, C. Fortin, C. Pham, Jean-Francois Paret, K. Mekhazni, R. Brenot, A. Garreau, F. van Dijk
High power Semiconductor Optical Amplifiers (SOA) are used in optical systems such as Mode Locked Lasers (MLL) as gain medium, or in Master Oscillator Power Amplifiers (MOPA) when they are monolithically integrated with a DFB Laser. In both applications, the optical power at the input of the SOA is rather large (from 1 to few 10th of mW) leading to gain saturation in the device. We present here an experimental study of the harmonic regime for a saturated high power SOA. The electro-optic parameters are measured and a model is proposed in two configurations: when the modulation is applied at the input or at the output of a two section high power SOA.
{"title":"Directly modulated high power semiconductor optical amplifier","authors":"F. Duport, Carmen Gomez, C. Fortin, C. Pham, Jean-Francois Paret, K. Mekhazni, R. Brenot, A. Garreau, F. van Dijk","doi":"10.1109/MWP.2018.8552859","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552859","url":null,"abstract":"High power Semiconductor Optical Amplifiers (SOA) are used in optical systems such as Mode Locked Lasers (MLL) as gain medium, or in Master Oscillator Power Amplifiers (MOPA) when they are monolithically integrated with a DFB Laser. In both applications, the optical power at the input of the SOA is rather large (from 1 to few 10th of mW) leading to gain saturation in the device. We present here an experimental study of the harmonic regime for a saturated high power SOA. The electro-optic parameters are measured and a model is proposed in two configurations: when the modulation is applied at the input or at the output of a two section high power SOA.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124563657","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 : 2018-10-01DOI: 10.1109/MWP.2018.8552878
G. Gredat, Hui Liu, G. Baili, F. Gutty, F. Goldfarb, I. Sagnes, F. Bretenaker
We investigate the strategies to reduce the noise of a class-A dual-frequency vertical external cavity surface emitting laser (VECSEL) operating at Cesium clock wavelength. We focus mainly on the beatnote phase noise of the two orthogonally polarized modes emitted. Within the framework of coupled rate equations, we show that the phase noise spectrum of the beatnote is well described by considering both the phase–amplitude coupling and the thermal effects. The spearhead of this study consists in first theoretically evidencing reduction strategies for the phase noise beatnote by optimizing the physical parameters of the model and then experimentally demonstrating its feasibility by using two in-phase fully–correlated beams pumping each mode separately. Possible ways to decrease the intensity noises are also identified.
{"title":"Strategies for noise reduction of a dual-frequency VECSEL dedicated to cesium CPT clocks","authors":"G. Gredat, Hui Liu, G. Baili, F. Gutty, F. Goldfarb, I. Sagnes, F. Bretenaker","doi":"10.1109/MWP.2018.8552878","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552878","url":null,"abstract":"We investigate the strategies to reduce the noise of a class-A dual-frequency vertical external cavity surface emitting laser (VECSEL) operating at Cesium clock wavelength. We focus mainly on the beatnote phase noise of the two orthogonally polarized modes emitted. Within the framework of coupled rate equations, we show that the phase noise spectrum of the beatnote is well described by considering both the phase–amplitude coupling and the thermal effects. The spearhead of this study consists in first theoretically evidencing reduction strategies for the phase noise beatnote by optimizing the physical parameters of the model and then experimentally demonstrating its feasibility by using two in-phase fully–correlated beams pumping each mode separately. Possible ways to decrease the intensity noises are also identified.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127198159","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 : 2018-10-01DOI: 10.1109/MWP.2018.8552850
Xingwei Ye, Fangzheng Zhang, Yue Yang, S. Pan
A compact photonics-based radar transceiver for simultaneous measurement of all the four elements in target polarization scatting matrix is proposed. In the transmitter, two wideband linear frequency modulated (LFM) signals with complementary chirp slopes are generated as the excitations in different polarizations. In the receiver, de-chirping and decoupling of radar echoes with different polarizations are implemented based on photonic frequency mixing. A proof-of-concept experiment of full-polarimetric inverse synthetic aperture radar (ISAR) imaging is carried out with a bandwidth of 6 GHz (9∼15 GHz). Polarization-dependent ISAR images are successfully recovered, which can verify the feasibility of the proposed radar transceiver.
{"title":"Photonics-based Radar Transceiver For Full-Polarimetric Inverse Synthetic Aperture Imaging","authors":"Xingwei Ye, Fangzheng Zhang, Yue Yang, S. Pan","doi":"10.1109/MWP.2018.8552850","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552850","url":null,"abstract":"A compact photonics-based radar transceiver for simultaneous measurement of all the four elements in target polarization scatting matrix is proposed. In the transmitter, two wideband linear frequency modulated (LFM) signals with complementary chirp slopes are generated as the excitations in different polarizations. In the receiver, de-chirping and decoupling of radar echoes with different polarizations are implemented based on photonic frequency mixing. A proof-of-concept experiment of full-polarimetric inverse synthetic aperture radar (ISAR) imaging is carried out with a bandwidth of 6 GHz (9∼15 GHz). Polarization-dependent ISAR images are successfully recovered, which can verify the feasibility of the proposed radar transceiver.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129712993","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}
A dual-band linear frequency-modulated continuous-wave (LFMCW) microwave photonic radar is proposed and demonstrated. The system is capable of operating at different bands independently and simultaneously based on a photonic-assisted stretch processing receiver. An experimental demonstration is conducted, operating at C-band and Ku-band with a bandwidth of 700MHz and 3600MHz respectively. A series of tests in a microwave anechoic chamber are performed. The results verify the concept of the dual-band microwave photonic radar, which provides a photonic solution to multi-band radar based on a unified system.
{"title":"Dual-band Microwave Photonic Radar based on a Photonic-Assisted Stretch Processing Receiver","authors":"Jiming Cao, Wen Jiang, Ruoming Li, Jiyao Yang, Zhenwei Mo, Xiangpeng Zhang, Wangzhe Li","doi":"10.1109/MWP.2018.8552864","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552864","url":null,"abstract":"A dual-band linear frequency-modulated continuous-wave (LFMCW) microwave photonic radar is proposed and demonstrated. The system is capable of operating at different bands independently and simultaneously based on a photonic-assisted stretch processing receiver. An experimental demonstration is conducted, operating at C-band and Ku-band with a bandwidth of 700MHz and 3600MHz respectively. A series of tests in a microwave anechoic chamber are performed. The results verify the concept of the dual-band microwave photonic radar, which provides a photonic solution to multi-band radar based on a unified system.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126484758","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 : 2018-10-01DOI: 10.1109/MWP.2018.8552915
Mónica Rico-Martínez, Christian Camilo Cano Vásquez, Santiago Isaac Rodríguez, G. M. V. Durán, I. Monroy
This work presents a comparison between Orthogonal Frequency Division Multiplexing OFDM and Generalized Frequency Division Multiplexing GFDM to evaluate the latency and bit error rate in a Fiber-wireless link in 3.5 GHz band using Software Defined Radio SDR, taking into account its feasibility for the 5G networks in the future.
{"title":"Comparison of performance between OFDM and GFDM in a 3.5GHz band 5G hybrid Fiber-Wireless link using SDR","authors":"Mónica Rico-Martínez, Christian Camilo Cano Vásquez, Santiago Isaac Rodríguez, G. M. V. Durán, I. Monroy","doi":"10.1109/MWP.2018.8552915","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552915","url":null,"abstract":"This work presents a comparison between Orthogonal Frequency Division Multiplexing OFDM and Generalized Frequency Division Multiplexing GFDM to evaluate the latency and bit error rate in a Fiber-wireless link in 3.5 GHz band using Software Defined Radio SDR, taking into account its feasibility for the 5G networks in the future.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129230984","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 : 2018-10-01DOI: 10.1109/MWP.2018.8552870
Xin Jiang, Xiangchuan Wang, S. Pan
A novel multi-antenna global navigation satellite system over fiber (GNSS-over-fiber) system with real-time microwave-photonics-based fiber-length-difference monitoring is proposed. In the architecture, GNSS signal transmission from two or more remote antennas to the local processing center is realized based on radio-over-fiber techniques. A novel microwavephotonics-based fiber length measurement scheme is applied to compensate the line bias delay between different GNSS channels due to the fiber-length variation. Then the carrier phase single difference (SD) algorithm, instead of the carrier phase double difference (DD) algorithm, can be used to improve the vertical precision of multi-antenna GNSS system. Experimental results show that the vertical positioning precision with SD algorithm is about 1.3 mm which is 3.15 times better than that with DD algorithm. Meanwhile, the horizontal positioning precision is about 1.5 mm which is on the same level compared with the system with DD algorithm.
{"title":"A Multi-antenna GNSS-over-fiber System with High Vertical Precision","authors":"Xin Jiang, Xiangchuan Wang, S. Pan","doi":"10.1109/MWP.2018.8552870","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552870","url":null,"abstract":"A novel multi-antenna global navigation satellite system over fiber (GNSS-over-fiber) system with real-time microwave-photonics-based fiber-length-difference monitoring is proposed. In the architecture, GNSS signal transmission from two or more remote antennas to the local processing center is realized based on radio-over-fiber techniques. A novel microwavephotonics-based fiber length measurement scheme is applied to compensate the line bias delay between different GNSS channels due to the fiber-length variation. Then the carrier phase single difference (SD) algorithm, instead of the carrier phase double difference (DD) algorithm, can be used to improve the vertical precision of multi-antenna GNSS system. Experimental results show that the vertical positioning precision with SD algorithm is about 1.3 mm which is 3.15 times better than that with DD algorithm. Meanwhile, the horizontal positioning precision is about 1.5 mm which is on the same level compared with the system with DD algorithm.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126649285","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 : 2018-10-01DOI: 10.1109/MWP.2018.8552880
A. Kondrashov, A. Ustinov, V. Sokolov, B. Kalinikos
Influence of an optical fiber length on nonlinear dynamics of a spin-wave optoelectronic oscillator is investigated. An increase of the signal power level leads to transition from a stable monochromatic oscillations to a chaotic signal generation through a number of bifurcations. Generation of the rectangular pulses, periodic nonlinear pulses, chaotic pulses, and dynamic chaos are observed for the different fiber lengths. Numerical characterization demonstrates increase of the fractal dimension with increasing of the optical fiber length.
{"title":"Investigation of the dynamic regime in operation of spin-wave optoelectronic oscillators","authors":"A. Kondrashov, A. Ustinov, V. Sokolov, B. Kalinikos","doi":"10.1109/MWP.2018.8552880","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552880","url":null,"abstract":"Influence of an optical fiber length on nonlinear dynamics of a spin-wave optoelectronic oscillator is investigated. An increase of the signal power level leads to transition from a stable monochromatic oscillations to a chaotic signal generation through a number of bifurcations. Generation of the rectangular pulses, periodic nonlinear pulses, chaotic pulses, and dynamic chaos are observed for the different fiber lengths. Numerical characterization demonstrates increase of the fractal dimension with increasing of the optical fiber length.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121826500","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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