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.2018.8552892
G. Hasanuzzaman, H. Shams, C. Renaud, J. Mitchell, S. Iezekiel
We propose and experimentally demonstrate a photonic THz signal generation technique combining a discrete optoelectronic oscillator (OEO) and optical frequency comb (OFC) generator. Using a microwave photonic filter (MPF), we generate an electrical oscillation up to 17.33 GHz with a phase noise of -103 dBc/Hz at 10 kHz offset frequency. The OEO frequency tunability is obtained by changing the bandwidth of a tunable optical band pass filter (TOBF). This can produce an electrical RF carrier from 6.58 GHz - 18.36 GHz. The OEO-driven optical comb generates 22 optical comb lines with a frequency spacing of 17.33 GHz covering a bandwidth of 360 GHz. By selecting two optical comb lines using a wavelength selective switch (WSS) and beating them in a uni-travelling carrier photodiode (UTC-PD), a THz wave is generated at 242.6 GHz with a phase noise of -78 dBc/Hz at 10 kHz offset frequency. This technique has potential for use in THz signal generation where it is possible to tune the THz carrier frequency by tuning the RF carrier generated from the OEO.
{"title":"Photonic THz Generation using Optoelectronic Oscillator-driven Optical Frequency Comb Generator","authors":"G. Hasanuzzaman, H. Shams, C. Renaud, J. Mitchell, S. Iezekiel","doi":"10.1109/MWP.2018.8552892","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552892","url":null,"abstract":"We propose and experimentally demonstrate a photonic THz signal generation technique combining a discrete optoelectronic oscillator (OEO) and optical frequency comb (OFC) generator. Using a microwave photonic filter (MPF), we generate an electrical oscillation up to 17.33 GHz with a phase noise of -103 dBc/Hz at 10 kHz offset frequency. The OEO frequency tunability is obtained by changing the bandwidth of a tunable optical band pass filter (TOBF). This can produce an electrical RF carrier from 6.58 GHz - 18.36 GHz. The OEO-driven optical comb generates 22 optical comb lines with a frequency spacing of 17.33 GHz covering a bandwidth of 360 GHz. By selecting two optical comb lines using a wavelength selective switch (WSS) and beating them in a uni-travelling carrier photodiode (UTC-PD), a THz wave is generated at 242.6 GHz with a phase noise of -78 dBc/Hz at 10 kHz offset frequency. This technique has potential for use in THz signal generation where it is possible to tune the THz carrier frequency by tuning the RF carrier generated from the OEO.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"295 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":"115610415","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.2018.8552868
R. Karembera, Takashi Yamaguchi, H. Toda
In this manuscript, we propose to use optical pulse compression in a dispersion managed fiber (DMF) with highly nonlinear fiber to enhance the output power in photonic-based 100-GHz RF generation. Even though the average dispersion is zero, RF gain of more than 5.0 dB can be obtained with moderate optical power to the DMF. Using four-sectioned DMF with zero average dispersion, we found the possibility of near octave-band operation in RF frequency.
{"title":"Output power enhancement in photonic-based RF generation by optical pulse compression with a dispersion managed highly-nonlinear fiber","authors":"R. Karembera, Takashi Yamaguchi, H. Toda","doi":"10.1109/MWP.2018.8552868","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552868","url":null,"abstract":"In this manuscript, we propose to use optical pulse compression in a dispersion managed fiber (DMF) with highly nonlinear fiber to enhance the output power in photonic-based 100-GHz RF generation. Even though the average dispersion is zero, RF gain of more than 5.0 dB can be obtained with moderate optical power to the DMF. Using four-sectioned DMF with zero average dispersion, we found the possibility of near octave-band operation in RF frequency.","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":"114526750","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.2018.8552844
Noor Hamdash, A. Sharaiha, T. Rampone, P. Morel, D. Le Berre, N. Martin, C. Quendo
This paper investigates the performance differences obtained by using four different SOAs as microwave phase shifters. All performances are evaluated in terms of measured phase shift, radiofrequency gain penalty and 3 dB bandwidth. A microwave phase shift as high as 89.3° is achieved by slow and fast light effects in a high gain extra-nonlinear SOA. In the same SOA a different response of the phase from usual CPO is observed experimentally at low frequencies for particular operating points in saturated regime. This phenomenon is theoretically analyzed by means of a small-signal analysis.
{"title":"Experimental and Small-signal Analysis of Microwave Photonic Phase Shifter based on Slow and Fast Light using Linear and Nonlinear Semiconductor Optical Amplifiers","authors":"Noor Hamdash, A. Sharaiha, T. Rampone, P. Morel, D. Le Berre, N. Martin, C. Quendo","doi":"10.1109/MWP.2018.8552844","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552844","url":null,"abstract":"This paper investigates the performance differences obtained by using four different SOAs as microwave phase shifters. All performances are evaluated in terms of measured phase shift, radiofrequency gain penalty and 3 dB bandwidth. A microwave phase shift as high as 89.3° is achieved by slow and fast light effects in a high gain extra-nonlinear SOA. In the same SOA a different response of the phase from usual CPO is observed experimentally at low frequencies for particular operating points in saturated regime. This phenomenon is theoretically analyzed by means of a small-signal analysis.","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":"128458436","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.2018.8552851
Pedro Tovar, Luis E. Ynoquio H, J. P. Weid, Vladimir B. RJabulkaibeiro, R. Ribeiro
This paper reports the photonic generation of apodized non-linear frequency modulation (NLFM) microwave pulses by using a self-heterodyne scheme. Time-resolved optical spectroscopy was developed for the characterization of the laser diode chirp. By using a step-shaped current stimulus the laser chirp transfer function H(s) was obtained.With knowledge of H(s), a numerical model produced the suitable current stimulus i(t) needed to generate apodized-shaped radio frequency chirped pulses through self-heterodyning. Experiment results agreed with the numerical simulations.
{"title":"Time-Resolved spectroscopy for laser chirp characterization and self-heterodyne generation of apodized-NLFM microwave pulses","authors":"Pedro Tovar, Luis E. Ynoquio H, J. P. Weid, Vladimir B. RJabulkaibeiro, R. Ribeiro","doi":"10.1109/MWP.2018.8552851","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552851","url":null,"abstract":"This paper reports the photonic generation of apodized non-linear frequency modulation (NLFM) microwave pulses by using a self-heterodyne scheme. Time-resolved optical spectroscopy was developed for the characterization of the laser diode chirp. By using a step-shaped current stimulus the laser chirp transfer function H(s) was obtained.With knowledge of H(s), a numerical model produced the suitable current stimulus i(t) needed to generate apodized-shaped radio frequency chirped pulses through self-heterodyning. Experiment results agreed with the numerical simulations.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"65 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":"123544884","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.2018.8552869
D. Seidel, A. Savchenkov, D. Eliyahu, Skip Williams, A. Matsko
We report on recent experiments involving tight packaging of Ka-band photonic oscillators based on Kerr frequency combs generated in nonlinear microresonators. The devices with volume not exceeding 1 cc characterized with phase noise approaching -120 dBc/Hz at 10 kHz frequency offset are demonstrated at both 28 GHz and 35 GHz.
{"title":"Minituarized Ka-band Photonic Oscillators","authors":"D. Seidel, A. Savchenkov, D. Eliyahu, Skip Williams, A. Matsko","doi":"10.1109/MWP.2018.8552869","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552869","url":null,"abstract":"We report on recent experiments involving tight packaging of Ka-band photonic oscillators based on Kerr frequency combs generated in nonlinear microresonators. The devices with volume not exceeding 1 cc characterized with phase noise approaching -120 dBc/Hz at 10 kHz frequency offset are demonstrated at both 28 GHz and 35 GHz.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"4 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":"124125384","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.2018.8552858
Chaitanya K. Mididoddi, Guoqing Wang, U. Habib, Hongxia Zhang, Chao Wang
Wavelength-controlled laser beam steering has been successfully demonstrated for indoor optical wireless communications (OWC). Here we demonstrate ultrafast user localization (50 million scans per second) in OWC based on real-time wavelength monitoring. A separate time stretched pulsed laser source is introduced to implement ultrafast optical wavelength (hence optical beam) scanning. A dispersion unbalanced Mach-Zehnder interferometric configuration creates chirped encoding in stretch optical pulses. The reflected optical wavelength from a remote user carrying the location information of the user is detected by real-time instantaneous microwave frequency detection. This new approach facilitates simultaneous ultrafast user localization and data transmission at communication C-band. A proof-of-concept experiment is carried out to verify the proposed approach.
{"title":"Ultrafast User Localization and Beam Steering in Optical Wireless Communication Using an In-Fibre Diffraction Grating","authors":"Chaitanya K. Mididoddi, Guoqing Wang, U. Habib, Hongxia Zhang, Chao Wang","doi":"10.1109/MWP.2018.8552858","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552858","url":null,"abstract":"Wavelength-controlled laser beam steering has been successfully demonstrated for indoor optical wireless communications (OWC). Here we demonstrate ultrafast user localization (50 million scans per second) in OWC based on real-time wavelength monitoring. A separate time stretched pulsed laser source is introduced to implement ultrafast optical wavelength (hence optical beam) scanning. A dispersion unbalanced Mach-Zehnder interferometric configuration creates chirped encoding in stretch optical pulses. The reflected optical wavelength from a remote user carrying the location information of the user is detected by real-time instantaneous microwave frequency detection. This new approach facilitates simultaneous ultrafast user localization and data transmission at communication C-band. A proof-of-concept experiment is carried out to verify the proposed approach.","PeriodicalId":146799,"journal":{"name":"2018 International Topical Meeting on Microwave Photonics (MWP)","volume":"17 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":"131252824","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.2018.8552867
Jiejun Zhao, Zhidan Ding, Fei Yang, H. Cai
We propose and demonstrate a configurable and flexible photonic true-time delay (PTTD) line for integrated transmitting/receiving optically controlled phased array antenna (PAA) based on combinations of cascaded linear chirped fiber Bragg grating (LCFBG). A large-scale beam steering angle close to the limit and high angle resolution can be obtained by precisely configuring the parameters including dispersion coefficient and the numbers of cascaded LCFBG; Multi-beams for different beam steering angles are acquired synchronously.
{"title":"Configurable Photonic True-Time Delay Line Based On Cascaded Linearly Chirped Fiber Bragg Grating","authors":"Jiejun Zhao, Zhidan Ding, Fei Yang, H. Cai","doi":"10.1109/MWP.2018.8552867","DOIUrl":"https://doi.org/10.1109/MWP.2018.8552867","url":null,"abstract":"We propose and demonstrate a configurable and flexible photonic true-time delay (PTTD) line for integrated transmitting/receiving optically controlled phased array antenna (PAA) based on combinations of cascaded linear chirped fiber Bragg grating (LCFBG). A large-scale beam steering angle close to the limit and high angle resolution can be obtained by precisely configuring the parameters including dispersion coefficient and the numbers of cascaded LCFBG; Multi-beams for different beam steering angles are acquired synchronously.","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":"130473694","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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