Pub Date : 2018-10-01DOI: 10.1109/MWP.2018.8552911
C. Jeon, Yongjin Na, Jungwon Kim, B. Lee
We demonstrate a passively phase-biased simple all-fiber optical-microwave phase detector based on intrinsic phase shift of multiport fiber coupler. It is composed of fiber coupler, phase modulator and balanced photodetector, hence free of additional phase bias and magneto-optic components. As a result of optical-microwave synchronization between mode-locked laser and voltage controlled microwave oscillator, 875-as integrated jitter [1 Hz-1 MHz] and 860-as rms timing drift over 1 hour is achieved.
{"title":"Simple all-fiber optical-microwave phase detector for subfemtosecond synchronization","authors":"C. Jeon, Yongjin Na, Jungwon Kim, B. Lee","doi":"10.1109/MWP.2018.8552911","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552911","url":null,"abstract":"We demonstrate a passively phase-biased simple all-fiber optical-microwave phase detector based on intrinsic phase shift of multiport fiber coupler. It is composed of fiber coupler, phase modulator and balanced photodetector, hence free of additional phase bias and magneto-optic components. As a result of optical-microwave synchronization between mode-locked laser and voltage controlled microwave oscillator, 875-as integrated jitter [1 Hz-1 MHz] and 860-as rms timing drift over 1 hour is achieved.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"11 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":"116931875","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.2018.8552906
L. Marigo-Lombart, C. Viallon, A. Rumeau, O. Gauthier-Lafaye, A. Monmayrant, H. Thienpont, K. Panajotov, G. Almuneau
This paper describes the high-frequency characterizations of a vertical electro-absorption modulator (EAM) to ensure its monolithic integration onto a VCSEL for data communications. Splitting the emitting and the modulating parts is an attractive approach compared to directly current-modulated VCSEL since it releases the intrinsic limitations due to carriers dynamics that occurs in such VCSEL device. It is, in this aim, utmost to thoroughly characterize and understand the properties and performances of the vertically integrated EAM under high frequency operation, as it will be decisive for the application of EAM-VCSEL to very high data-rate communications. EAM measurements, presented up to 40 GHz, require a precise control of the optical fiber coupling and a precise evaluation of the injection losses over the full frequency range.
{"title":"High frequency characterization of a vertical electro-absorption modulator for data communications","authors":"L. Marigo-Lombart, C. Viallon, A. Rumeau, O. Gauthier-Lafaye, A. Monmayrant, H. Thienpont, K. Panajotov, G. Almuneau","doi":"10.1109/MWP.2018.8552906","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552906","url":null,"abstract":"This paper describes the high-frequency characterizations of a vertical electro-absorption modulator (EAM) to ensure its monolithic integration onto a VCSEL for data communications. Splitting the emitting and the modulating parts is an attractive approach compared to directly current-modulated VCSEL since it releases the intrinsic limitations due to carriers dynamics that occurs in such VCSEL device. It is, in this aim, utmost to thoroughly characterize and understand the properties and performances of the vertically integrated EAM under high frequency operation, as it will be decisive for the application of EAM-VCSEL to very high data-rate communications. EAM measurements, presented up to 40 GHz, require a precise control of the optical fiber coupling and a precise evaluation of the injection losses over the full frequency range.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"22 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":"129016611","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.2018.8552922
B. Haas, J. McKinney
We present, characterize, and demonstrate a simple, and novel, continuous-time band-folding microwave photonic link. Implemented with a single dual-drive Mach-Zehnder modulator (DDMZM) acting as 2 parallel phase modulators, the link effects an 8:1 bandwidth folding to enable direct sampling and digitization of an entire band. Two microwave tones modulated on one arm along with their 3rd-order intermodulation (IMD) products serve as the spectral comb that exists only in the desired band, and the microwave spectrum of interest (SOI) is modulated onto the other arm. Parallel implementation adds, rather than multiplies, the tone and signal together, eliminating many cross-modulation products and spurs that would otherwise complicate and limit the foldable bandwidth. The link can operate with no optical filters if biased or with no bias if an optical bandpass filter is used.
{"title":"A band-limited, intermodulation-based band-folding frequency translation link using a single modulator","authors":"B. Haas, J. McKinney","doi":"10.1109/MWP.2018.8552922","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552922","url":null,"abstract":"We present, characterize, and demonstrate a simple, and novel, continuous-time band-folding microwave photonic link. Implemented with a single dual-drive Mach-Zehnder modulator (DDMZM) acting as 2 parallel phase modulators, the link effects an 8:1 bandwidth folding to enable direct sampling and digitization of an entire band. Two microwave tones modulated on one arm along with their 3rd-order intermodulation (IMD) products serve as the spectral comb that exists only in the desired band, and the microwave spectrum of interest (SOI) is modulated onto the other arm. Parallel implementation adds, rather than multiplies, the tone and signal together, eliminating many cross-modulation products and spurs that would otherwise complicate and limit the foldable bandwidth. The link can operate with no optical filters if biased or with no bias if an optical bandpass filter is used.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"114 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":"129990138","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.2018.8552912
J. Clement, H. Maestre, G. Torregrosa, C. Fernández-Pousa
An incoherent optical frequency domain reflectometer (I-OFDR) has been implemented using frequency-shifted interferometry in a 9-GHz bandwidth. The system is based on low-bandwidth direct detection and balanced bidirectional phase modulation, which provides negligible amplitude and phase imbalance in frequency up and down-conversion. The setup is fed with dithered laser light to reduce coherent effects, and the intensity detected after the slope of a fiber Bragg grating. The reflectometer shows a dynamic range of 25 dB, a sensitivity $< $ -55 dB, and a resolution of 2.3 cm in fiber. These results show the feasibility of this type of I-OFDR systems for the interrogation of quasi-distributed, high-density optical fiber sensor networks.
{"title":"Incoherent Optical Frequency Domain Reflectometry Using Balanced Frequency-Shifted Interferometry in a Downconverted Phase-Modulated Link","authors":"J. Clement, H. Maestre, G. Torregrosa, C. Fernández-Pousa","doi":"10.1109/MWP.2018.8552912","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552912","url":null,"abstract":"An incoherent optical frequency domain reflectometer (I-OFDR) has been implemented using frequency-shifted interferometry in a 9-GHz bandwidth. The system is based on low-bandwidth direct detection and balanced bidirectional phase modulation, which provides negligible amplitude and phase imbalance in frequency up and down-conversion. The setup is fed with dithered laser light to reduce coherent effects, and the intensity detected after the slope of a fiber Bragg grating. The reflectometer shows a dynamic range of 25 dB, a sensitivity $< $ -55 dB, and a resolution of 2.3 cm in fiber. These results show the feasibility of this type of I-OFDR systems for the interrogation of quasi-distributed, high-density optical fiber sensor networks.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"9 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":"130014896","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.2018.8552901
M. Burla, W. Heni, C. Hoessbacher, D. Werner, Y. Fedoryshyn, J. Leuthold, D. Elder, L. Dalton
We report the first experimental characterization of intermodulation distortions in ultrafast (> 325 GHz) plasmonic-organic hybrid Mach-Zehnder modulators. The third-order input intercept point (IIP3) measured for a 25 μ m-long plasmonic modulator reaches 18.9 dBm, very close to the value of 19 dBm obtained for a commercial high-performance GaAs modulator. The plasmonic approach may provide ultrafast (hundreds GHz speeds), ultracompact and highly linear modulators for novel microwave photonics applications.
{"title":"Nonlinear Distortions in Plasmonic Mach-Zehnder Modulators","authors":"M. Burla, W. Heni, C. Hoessbacher, D. Werner, Y. Fedoryshyn, J. Leuthold, D. Elder, L. Dalton","doi":"10.1109/MWP.2018.8552901","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552901","url":null,"abstract":"We report the first experimental characterization of intermodulation distortions in ultrafast (> 325 GHz) plasmonic-organic hybrid Mach-Zehnder modulators. The third-order input intercept point (IIP3) measured for a 25 μ m-long plasmonic modulator reaches 18.9 dBm, very close to the value of 19 dBm obtained for a commercial high-performance GaAs modulator. The plasmonic approach may provide ultrafast (hundreds GHz speeds), ultracompact and highly linear modulators for novel microwave photonics applications.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"11 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":"121196502","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.2018.8552921
Jiachen Li, Yu Li, Minghua Chen
We propose a narrowband rectangular optical filter based on cascading ring-assisted Mach-Zehnder interferometers with spectrum tailoring. Just by reasonably arranging the temperatures of different micro heaters on each stage, the center wavelength and bandwidth of filter can be tuned simply. We fabricated the device and measured the performance to prove that the bandwidth could be adjusted from 14 GHz to 4 GHz maintaining rectangular response. The filter shows potential in practical applications due to its flexibility and reconfigurability.
{"title":"An Integrated Adjustable-Bandwidth Rectangular Filter Based on Cascading Ring-Assisted Mach-Zehnder Interferometers","authors":"Jiachen Li, Yu Li, Minghua Chen","doi":"10.1109/MWP.2018.8552921","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552921","url":null,"abstract":"We propose a narrowband rectangular optical filter based on cascading ring-assisted Mach-Zehnder interferometers with spectrum tailoring. Just by reasonably arranging the temperatures of different micro heaters on each stage, the center wavelength and bandwidth of filter can be tuned simply. We fabricated the device and measured the performance to prove that the bandwidth could be adjusted from 14 GHz to 4 GHz maintaining rectangular response. The filter shows potential in practical applications due to its flexibility and reconfigurability.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"34 5 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":"116498565","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.2018.8552872
H. Park, I. Ha, Sang‐Kook Han
We propose and experimentally demonstrate a frequency-separated model based digital pre-distortion (DPD) technique in intermediate frequency over fiber system. Frequency-separated model based DPD could mitigate distortion caused by optical and electrical components in the transmission system. To employ the proposed DPD technique, least-mean-square (LMS) algorithm is used to derive the coefficients of pre-distorting equalizer. By the proposed DPD, error vector magnitude was decreased and adjacent carrier leakage ratio was increased.
{"title":"Distortion mitigation in IFoF system employing frequency-separated DPD","authors":"H. Park, I. Ha, Sang‐Kook Han","doi":"10.1109/MWP.2018.8552872","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552872","url":null,"abstract":"We propose and experimentally demonstrate a frequency-separated model based digital pre-distortion (DPD) technique in intermediate frequency over fiber system. Frequency-separated model based DPD could mitigate distortion caused by optical and electrical components in the transmission system. To employ the proposed DPD technique, least-mean-square (LMS) algorithm is used to derive the coefficients of pre-distorting equalizer. By the proposed DPD, error vector magnitude was decreased and adjacent carrier leakage ratio was increased.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"42 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":"116463163","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.2018.8552903
A. Louchet-Chauvet
We propose a novel analog architecture for timereversing optically carried RF signals, based on a rare-earth atomic processor. Our scheme combines long processed signals duration (> 10 μs), potentially GHz bandwidth, direct access to the signal field amplitude, and compatibility with phase-modulated signals. The combination of these features makes this architecture ideal for refocusing RF signals distorted by their propagation in a reverberating environment.
{"title":"Analog time-reversal of optically-carried RF signals with a rare earth ion-doped processor with broadband potential","authors":"A. Louchet-Chauvet","doi":"10.1109/MWP.2018.8552903","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552903","url":null,"abstract":"We propose a novel analog architecture for timereversing optically carried RF signals, based on a rare-earth atomic processor. Our scheme combines long processed signals duration (> 10 μs), potentially GHz bandwidth, direct access to the signal field amplitude, and compatibility with phase-modulated signals. The combination of these features makes this architecture ideal for refocusing RF signals distorted by their propagation in a reverberating environment.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"8 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":"125205945","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.2018.8552879
Hui Liu, G. Gredat, S. De, I. Fsaifes, Aliou Ly, Rémy Vatré, G. Baili, S. Bouchoule, F. Goldfarb, F. Bretenaker
We demonstrate the noise reduction in a dual-frequency vertical-external-cavity surface-emitting laser at telecom wavelength using fully correlated pumping. A fully in-phase correlated pumping is obtained by polarization combining two single-mode fibered laser diodes in a single-mode fiber. With this pumping, ultra-low noises are observed, i. e. relative intensity noise lower than -140 dB/Hz, and beatnote phase noise suppression by 30 dB, getting close to the spontaneous emission limit. The generalized noise reduction is shown by modeling the beatnote phase noise spectra and relative intensity noise transfer gain depending on the in-phase correlation amplitude.
{"title":"Noise reduction in a dual-frequency VECSEL at telecom wavelength using fully correlated pumping","authors":"Hui Liu, G. Gredat, S. De, I. Fsaifes, Aliou Ly, Rémy Vatré, G. Baili, S. Bouchoule, F. Goldfarb, F. Bretenaker","doi":"10.1109/MWP.2018.8552879","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552879","url":null,"abstract":"We demonstrate the noise reduction in a dual-frequency vertical-external-cavity surface-emitting laser at telecom wavelength using fully correlated pumping. A fully in-phase correlated pumping is obtained by polarization combining two single-mode fibered laser diodes in a single-mode fiber. With this pumping, ultra-low noises are observed, i. e. relative intensity noise lower than -140 dB/Hz, and beatnote phase noise suppression by 30 dB, getting close to the spontaneous emission limit. The generalized noise reduction is shown by modeling the beatnote phase noise spectra and relative intensity noise transfer gain depending on the in-phase correlation amplitude.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"41 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":"124699682","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.2018.8552883
T. Koonen, F. Gomez-Agis, J. Sung, Z. Cao, K. Mekonnen, F. Huijskens, E. Tangdiongga
A hybrid wireless indoor system has been designed and validated which realizes ultrahigh-capacity transmission downstream by directing narrow infrared beams to mobile devices individually, using an AWGR-based module for wavelength-controlled 2D beam steering. For upstream, 60GHz radio techniques are employed which are also used to localize the devices and enable automatic infrared beam steering by a remotely located central communication controller. In a laboratory demonstrator, automatic mobile device localization and IR beam steering is demonstrated, and the transmission performance of conveying two high-def video streams optical-wirelessly to two users individually is demonstrated.
{"title":"Indoor Optical/Radio Wireless Communication - Demonstration of High-Def Video Streaming using Steerable Infrared Beams","authors":"T. Koonen, F. Gomez-Agis, J. Sung, Z. Cao, K. Mekonnen, F. Huijskens, E. Tangdiongga","doi":"10.1109/MWP.2018.8552883","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552883","url":null,"abstract":"A hybrid wireless indoor system has been designed and validated which realizes ultrahigh-capacity transmission downstream by directing narrow infrared beams to mobile devices individually, using an AWGR-based module for wavelength-controlled 2D beam steering. For upstream, 60GHz radio techniques are employed which are also used to localize the devices and enable automatic infrared beam steering by a remotely located central communication controller. In a laboratory demonstrator, automatic mobile device localization and IR beam steering is demonstrated, and the transmission performance of conveying two high-def video streams optical-wirelessly to two users individually is demonstrated.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"48 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":"122543101","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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