Pub Date : 2014-12-22DOI: 10.1109/MWP.2014.6994543
Jieyu Ning, Yitang Dai, Feifei Yin, Jianqiang Li, Kun Xu
We propose and experimentally demonstrate a linearization approach for a novel type of intensity-modulated directly-detected (IM-DD) analog photonic link based on digital processing technique. In our scheme, the analog signal is intensity and orthogonally modulated on a pair of co-propagated photonic links, i.e. one of the two intensity modulations has a bias angle which is 90 degree difference from the other. At the remote end, the analog signal can be linearly recovered by a digital signal processing based on the direct detections of the link pair. We experimentally demonstrate our concept through a piece of polarization maintained fiber (PMF), a polarization modulator (PolM), a polarizer, and the dual-channel wavelength division multiplexing (WDM) technology. The PMF, PolM, and the polarizer constitute an asymmetric mach-zehnder modulator (A-MZM), whose bias angle can be tuned easily by tuning the input optical carrier wavelength. Experiment results show 26.8 dB suppression of the third-order intermodulation distortion (IMD3) compared with the traditional quadrature-biased IM-DD link is achieved. Compared with the previously-reported linearized phase- or polarization-modulated, in-phase/quadrature demodulation (PM-IQD or PolM-IQD) analog photonic links, our scheme has the advantage that neither the highly-coherent optical local oscillation nor the precise polarization alignment is required in the remote end.
{"title":"Linear demodulation of intensity-modulated analog photonic link based on polarization modulator","authors":"Jieyu Ning, Yitang Dai, Feifei Yin, Jianqiang Li, Kun Xu","doi":"10.1109/MWP.2014.6994543","DOIUrl":"https://doi.org/10.1109/MWP.2014.6994543","url":null,"abstract":"We propose and experimentally demonstrate a linearization approach for a novel type of intensity-modulated directly-detected (IM-DD) analog photonic link based on digital processing technique. In our scheme, the analog signal is intensity and orthogonally modulated on a pair of co-propagated photonic links, i.e. one of the two intensity modulations has a bias angle which is 90 degree difference from the other. At the remote end, the analog signal can be linearly recovered by a digital signal processing based on the direct detections of the link pair. We experimentally demonstrate our concept through a piece of polarization maintained fiber (PMF), a polarization modulator (PolM), a polarizer, and the dual-channel wavelength division multiplexing (WDM) technology. The PMF, PolM, and the polarizer constitute an asymmetric mach-zehnder modulator (A-MZM), whose bias angle can be tuned easily by tuning the input optical carrier wavelength. Experiment results show 26.8 dB suppression of the third-order intermodulation distortion (IMD3) compared with the traditional quadrature-biased IM-DD link is achieved. Compared with the previously-reported linearized phase- or polarization-modulated, in-phase/quadrature demodulation (PM-IQD or PolM-IQD) analog photonic links, our scheme has the advantage that neither the highly-coherent optical local oscillation nor the precise polarization alignment is required in the remote end.","PeriodicalId":220534,"journal":{"name":"Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129545278","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 : 2014-12-22DOI: 10.1109/MWP.2014.6994567
Chao Wang, N. Gomes
A novel approach to sensing broadband radio frequency (RF) spectrum beyond the Nyquist limit based on photonic temporal channelization and compressive sensing is proposed. A spectrally-sparse RF signal with unknown frequencies is modulated onto a highly chirped optical pulse. An optical channelizer slices the modulated pulse spectrum, which is equivalent to temporally sampling the RF waveform thanks to the dispersion-induced wavelength-to-time mapping. This serial-to-parallel conversion avoids the use of a high-speed detector and digitizer. Furthermore, compressive sensing with optical random demodulation is achieved using a spatial light modulator, enabling the system to capture the wideband multi-tone RF signal with a sampling rate far lower than the Nyquist rate. It is demonstrated that the temporal channelization system with a channel spacing of 20 GHz achieves RF spectrum sensing with a high resolution of 196 MHz. With an equivalent sampling rate of only 25 GHz, a 50-GHz broadband two-tone RF signal can be captured and reconstructed by the system thanks to compressive sensing with a compression ratio of 4.
{"title":"Photonics-enabled sub-Nyquist radio frequency sensing based on temporal channelization and compressive sensing","authors":"Chao Wang, N. Gomes","doi":"10.1109/MWP.2014.6994567","DOIUrl":"https://doi.org/10.1109/MWP.2014.6994567","url":null,"abstract":"A novel approach to sensing broadband radio frequency (RF) spectrum beyond the Nyquist limit based on photonic temporal channelization and compressive sensing is proposed. A spectrally-sparse RF signal with unknown frequencies is modulated onto a highly chirped optical pulse. An optical channelizer slices the modulated pulse spectrum, which is equivalent to temporally sampling the RF waveform thanks to the dispersion-induced wavelength-to-time mapping. This serial-to-parallel conversion avoids the use of a high-speed detector and digitizer. Furthermore, compressive sensing with optical random demodulation is achieved using a spatial light modulator, enabling the system to capture the wideband multi-tone RF signal with a sampling rate far lower than the Nyquist rate. It is demonstrated that the temporal channelization system with a channel spacing of 20 GHz achieves RF spectrum sensing with a high resolution of 196 MHz. With an equivalent sampling rate of only 25 GHz, a 50-GHz broadband two-tone RF signal can be captured and reconstructed by the system thanks to compressive sensing with a compression ratio of 4.","PeriodicalId":220534,"journal":{"name":"Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126306191","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 : 2014-12-22DOI: 10.1587/TRANSELE.E98.C.764
A. Beling, J. Campbell, Kejia Li, Qinglong Li, Ye Wang, M. Woodson, Xiaojun Xie, Zhanyu Yang
This talk reviews modified uni-traveling carrier (MUTC) photodiodes that have achieved high RF output power levels of up to 1.8 Watt. Discrete wideband photodiodes, narrowband photodiodes, and photodiode arrays and their applications in analog links and photonic microwave generation are discussed.
{"title":"High-power photodiodes for analog applications","authors":"A. Beling, J. Campbell, Kejia Li, Qinglong Li, Ye Wang, M. Woodson, Xiaojun Xie, Zhanyu Yang","doi":"10.1587/TRANSELE.E98.C.764","DOIUrl":"https://doi.org/10.1587/TRANSELE.E98.C.764","url":null,"abstract":"This talk reviews modified uni-traveling carrier (MUTC) photodiodes that have achieved high RF output power levels of up to 1.8 Watt. Discrete wideband photodiodes, narrowband photodiodes, and photodiode arrays and their applications in analog links and photonic microwave generation are discussed.","PeriodicalId":220534,"journal":{"name":"Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124088679","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 : 2014-12-22DOI: 10.1109/MWP.2014.6994552
Q. N. Q. Nhu, Q. Nguyen-The, H. N. Tan, M. Matsuura, N. Kishi
A novel technique for all-optical 4×10 Gb/s NRZ-to-RZ format conversion and wavelength multicasting with pulsewidth tunability using a Raman amplification-based multiwavelength pulses compressor and a high nonlinear fiber is successfully demonstrated. The input NRZ signal is multicast and converted to RZ signals at four wave mixing products and the pulsewidths follow those of the compressed clocks. The tunable pulsewidth of RZ signals outputs are around from 4.68 ps to 12.17 ps. Error-free operations are achieved with small penalty variations among RZ outputs channels.
{"title":"Parametric NRZ-to-RZ wavelength multicasting with pulsewidth tunability using Raman amplification multiwavelength pulse compressor","authors":"Q. N. Q. Nhu, Q. Nguyen-The, H. N. Tan, M. Matsuura, N. Kishi","doi":"10.1109/MWP.2014.6994552","DOIUrl":"https://doi.org/10.1109/MWP.2014.6994552","url":null,"abstract":"A novel technique for all-optical 4×10 Gb/s NRZ-to-RZ format conversion and wavelength multicasting with pulsewidth tunability using a Raman amplification-based multiwavelength pulses compressor and a high nonlinear fiber is successfully demonstrated. The input NRZ signal is multicast and converted to RZ signals at four wave mixing products and the pulsewidths follow those of the compressed clocks. The tunable pulsewidth of RZ signals outputs are around from 4.68 ps to 12.17 ps. Error-free operations are achieved with small penalty variations among RZ outputs channels.","PeriodicalId":220534,"journal":{"name":"Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130732553","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 : 2014-12-22DOI: 10.1109/MWP.2014.6994523
M. Ameya, S. Kurokawa
In this paper, we propose a new method for electromagnetic interference (EMI) noise analysis using an analog radio-over-fiber (RoF) link, cross domain analyzer, and mobile robot. With this new method, both the phase distribution and amplitude distribution of an electric field radiated by an EMI noise source can be measured. From the measured and simulated results obtained using the method of moments technique, we show that we can differentiate between noise sources in different positions using the phase distribution measured on a measurement circle.
{"title":"EMI noise source discrimination using cross domain analyzer and analog RoF link with mobile robot","authors":"M. Ameya, S. Kurokawa","doi":"10.1109/MWP.2014.6994523","DOIUrl":"https://doi.org/10.1109/MWP.2014.6994523","url":null,"abstract":"In this paper, we propose a new method for electromagnetic interference (EMI) noise analysis using an analog radio-over-fiber (RoF) link, cross domain analyzer, and mobile robot. With this new method, both the phase distribution and amplitude distribution of an electric field radiated by an EMI noise source can be measured. From the measured and simulated results obtained using the method of moments technique, we show that we can differentiate between noise sources in different positions using the phase distribution measured on a measurement circle.","PeriodicalId":220534,"journal":{"name":"Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133435603","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 : 2014-12-22DOI: 10.1109/MWP.2014.6994574
H. Shams, M. Fice, K. Balakier, C. Renaud, A. Seeds, F. van Dijk
We experimentally demonstrate photonic generation of a multichannel THz wireless signal at 200 GHz, with data rate up to 40 Gb/s QPSK modulation format using an optical heterodyne technique and digital coherent detection. The BER measurements were carried out for three subcarriers each modulated with 5 Gbaud QPSK or for two subcarriers modulated with 10 Gbaud QPSK, giving a total speed of 30 Gb/s or 40 Gb/s, respectively. The proposed system can provide a high-speed wireless transmission capability by using spectrally efficient subcarrier channels that increase the overall speed and reduce the requirement for electronic bandwidth.
{"title":"Multichannel 200GHz 40Gb/s wireless communication system using photonic signal generation","authors":"H. Shams, M. Fice, K. Balakier, C. Renaud, A. Seeds, F. van Dijk","doi":"10.1109/MWP.2014.6994574","DOIUrl":"https://doi.org/10.1109/MWP.2014.6994574","url":null,"abstract":"We experimentally demonstrate photonic generation of a multichannel THz wireless signal at 200 GHz, with data rate up to 40 Gb/s QPSK modulation format using an optical heterodyne technique and digital coherent detection. The BER measurements were carried out for three subcarriers each modulated with 5 Gbaud QPSK or for two subcarriers modulated with 10 Gbaud QPSK, giving a total speed of 30 Gb/s or 40 Gb/s, respectively. The proposed system can provide a high-speed wireless transmission capability by using spectrally efficient subcarrier channels that increase the overall speed and reduce the requirement for electronic bandwidth.","PeriodicalId":220534,"journal":{"name":"Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131071583","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 : 2014-12-22DOI: 10.1109/MWP.2014.6994528
Y. N. Wijayanto, A. Kanno, T. Kawanishi, H. Murata, Y. Okamura
We propose z-cut LiNbO3 optical modulators using patch-antennas with orthogonal-gaps for millimeter-wave radar applications. They are fabricated on thin LiNbO3 crystals bonded with low-k dielectric materials. Large modulation efficiency and low noise response are obtainable.
{"title":"Z-cut LiNbO3 optical modulator using patch-antenna with orthogonal-gaps for millimeter-wave radar applications","authors":"Y. N. Wijayanto, A. Kanno, T. Kawanishi, H. Murata, Y. Okamura","doi":"10.1109/MWP.2014.6994528","DOIUrl":"https://doi.org/10.1109/MWP.2014.6994528","url":null,"abstract":"We propose z-cut LiNbO3 optical modulators using patch-antennas with orthogonal-gaps for millimeter-wave radar applications. They are fabricated on thin LiNbO3 crystals bonded with low-k dielectric materials. Large modulation efficiency and low noise response are obtainable.","PeriodicalId":220534,"journal":{"name":"Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123822554","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 : 2014-12-22DOI: 10.1109/MWP.2014.6994478
Yuting Fan, Anthony E. Aighobahi, N. Gomes, Kun Xu
In this paper, we experimentally investigate the throughput of IEEE 802.11n 2×2 multiple-input-multiple-output (MIMO) signals in a radio-over-fiber-based distributed antenna system (DAS) with different fiber links. Both a MIMO-supported access point (AP) and a spatial-diversity-supported AP were separately employed in the experiments. Throughput measurements were carried out with wireless users at different locations in a typical office environment. The results indicate that MIMO signals can maintain high throughput when the fiber length difference between the two remote antenna units (RAUs) is under 100 m and falls quickly when the length difference is greater. For the spatial diversity signals, high throughput can be maintained even when the difference is 150m.
{"title":"Performance of commercial MIMO access point in distributed antenna system with different fiber lengths","authors":"Yuting Fan, Anthony E. Aighobahi, N. Gomes, Kun Xu","doi":"10.1109/MWP.2014.6994478","DOIUrl":"https://doi.org/10.1109/MWP.2014.6994478","url":null,"abstract":"In this paper, we experimentally investigate the throughput of IEEE 802.11n 2×2 multiple-input-multiple-output (MIMO) signals in a radio-over-fiber-based distributed antenna system (DAS) with different fiber links. Both a MIMO-supported access point (AP) and a spatial-diversity-supported AP were separately employed in the experiments. Throughput measurements were carried out with wireless users at different locations in a typical office environment. The results indicate that MIMO signals can maintain high throughput when the fiber length difference between the two remote antenna units (RAUs) is under 100 m and falls quickly when the length difference is greater. For the spatial diversity signals, high throughput can be maintained even when the difference is 150m.","PeriodicalId":220534,"journal":{"name":"Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132954331","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 : 2014-12-22DOI: 10.1109/MWP.2014.6994501
Y. Fukuchi, Taku Sekine, Kazuhiro Ohnaka
We propose a bismuth-based actively and harmonically mode-locked short-cavity fiber laser. A 1.5-m-long bismuth-oxide-based nonlinear erbium-doped fiber is used as both a gain medium and a noise suppressor, and ultra-stable 10GHz short pulses are generated.
{"title":"Ultra-stable short pulse generation from an actively and harmonically mode-locked fiber laser employing a bismuth-oxide-based nonlinear erbium-doped fiber","authors":"Y. Fukuchi, Taku Sekine, Kazuhiro Ohnaka","doi":"10.1109/MWP.2014.6994501","DOIUrl":"https://doi.org/10.1109/MWP.2014.6994501","url":null,"abstract":"We propose a bismuth-based actively and harmonically mode-locked short-cavity fiber laser. A 1.5-m-long bismuth-oxide-based nonlinear erbium-doped fiber is used as both a gain medium and a noise suppressor, and ultra-stable 10GHz short pulses are generated.","PeriodicalId":220534,"journal":{"name":"Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128884121","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 : 2014-12-22DOI: 10.1109/MWP.2014.6994507
S. Mieda, S. Shiratori, N. Yokota, H. Yasaka, W. Kobayashi
An optically controlled semiconductor laser with broad 3-dB bandwidth is achieved by introducing a phase- and intensity-controllable external cavity into a DFB laser. The external cavity functions as a passive-feedback section for the semiconductor laser. The optimum structure of an optically controlled passive-feedback laser (OC-PFL) for widening the 3-dB bandwidth of the laser is numerically analyzed. A broad 3-dB bandwidth of up to 40 GHz is experimentally confirmed by using a fabricated OC-PFL with a structure designed on the basis of the analysis results. It is also experimentally confirmed that it is possible to achieve 3-dB bandwidth of more than 50 GHz.
{"title":"High-speed optically controlled semiconductor light source with an external cavity","authors":"S. Mieda, S. Shiratori, N. Yokota, H. Yasaka, W. Kobayashi","doi":"10.1109/MWP.2014.6994507","DOIUrl":"https://doi.org/10.1109/MWP.2014.6994507","url":null,"abstract":"An optically controlled semiconductor laser with broad 3-dB bandwidth is achieved by introducing a phase- and intensity-controllable external cavity into a DFB laser. The external cavity functions as a passive-feedback section for the semiconductor laser. The optimum structure of an optically controlled passive-feedback laser (OC-PFL) for widening the 3-dB bandwidth of the laser is numerically analyzed. A broad 3-dB bandwidth of up to 40 GHz is experimentally confirmed by using a fabricated OC-PFL with a structure designed on the basis of the analysis results. It is also experimentally confirmed that it is possible to achieve 3-dB bandwidth of more than 50 GHz.","PeriodicalId":220534,"journal":{"name":"Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129158629","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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