We discuss the performance of Coherent-MIMO-DFS over deployed optical networks in various configurations and address technological challenges such as adaptation to various fiber types and disturbance identification. Two different field trial results are exploited, demonstrating the adaptability of our distributed fiber sensing interrogator to the diverse environments that can be encountered in the context of sensing over terrestrial telecommunication networks. We discuss the advantages of extracting the full backscattered Jones matrices using a DFS interrogator. Mechanical events including threats to the infrastructure are localized and identified and different identification methods are discussed. We draw a correspondence between lab measurements and field events based on the type of environment, and finally we present a classification method based on transfer learning with 90% accuracy.
{"title":"Distributed Coherent Sensing Over Deployed Fibers for Network as a Sensor Applications","authors":"Sterenn Guerrier;Christian Dorize;Khouloud Abdelli;Haïk Mardoyan;Henrique Pavani;Cristian Antonelli;Antonio Mecozzi;Amin Koubaa;Khalid Darwish;Mohammed Biyahi;Élie Awwad;Jérémie Renaudier","doi":"10.1109/JLT.2024.3498070","DOIUrl":"https://doi.org/10.1109/JLT.2024.3498070","url":null,"abstract":"We discuss the performance of Coherent-MIMO-DFS over deployed optical networks in various configurations and address technological challenges such as adaptation to various fiber types and disturbance identification. Two different field trial results are exploited, demonstrating the adaptability of our distributed fiber sensing interrogator to the diverse environments that can be encountered in the context of sensing over terrestrial telecommunication networks. We discuss the advantages of extracting the full backscattered Jones matrices using a DFS interrogator. Mechanical events including threats to the infrastructure are localized and identified and different identification methods are discussed. We draw a correspondence between lab measurements and field events based on the type of environment, and finally we present a classification method based on transfer learning with 90% accuracy.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1736-1745"},"PeriodicalIF":4.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The E/W band millimeter-wave (MMW) emerges as a promising frequency band with many advantages such as the possession of abundant spectrum resources, low atmospheric attenuation, and good directionality. Meanwhile, full-photonic based MMW systems offer the potential to further reduce the complexity of electronic down-conversion and enhance overall system bandwidth, and allow seamless integration with the fiber-optic network. In this paper, we proposed an E/W band MMW communication architecture based on full-photonic up- and down-conversions, utilizing a frequency- and phase-locked optical two-tone generator at both the transmitting and receiving end. We successfully demonstrated a long-distance field trial of E/W-Band wireless transmission, achieving 26.8-km wireless delivery of 32-Gb/s quadrature phase shift keying (QPSK) signal, and the largest net-rate-distance-product up to 745.74 Gb/s·km per antenna per channel. The long-distance transmission performance of different modulation formats was also studied. We also achieved a 22-Gb/s QPSK transmission over a longer distance of 30.4 km, with a net-rate and distance product reaching 581.56 Gb/s·km. Moreover, this paper analyzes the complex sea surface channel and experimentally verifies the influence of the sea surface environment on the channel, which is instructive for long-distance MMW sea surface communications.
{"title":"Long Distance Field Trial of E/W-Band Signal Wireless Delivery Based on Full Photonic Up- and Down-Conversions","authors":"Yinjun Liu;Li Tao;Boyu Dong;Dianyuan Ping;Junhao Zhao;Shuhong He;Qichao Lu;Tong Cheng;Yaxuan Li;Renjie Li;Sizhe Xing;Junlian Jia;An Yan;Jianyang Shi;Chao Shen;Ziwei Li;Nan Chi;Junwen Zhang","doi":"10.1109/JLT.2024.3496894","DOIUrl":"https://doi.org/10.1109/JLT.2024.3496894","url":null,"abstract":"The E/W band millimeter-wave (MMW) emerges as a promising frequency band with many advantages such as the possession of abundant spectrum resources, low atmospheric attenuation, and good directionality. Meanwhile, full-photonic based MMW systems offer the potential to further reduce the complexity of electronic down-conversion and enhance overall system bandwidth, and allow seamless integration with the fiber-optic network. In this paper, we proposed an E/W band MMW communication architecture based on full-photonic up- and down-conversions, utilizing a frequency- and phase-locked optical two-tone generator at both the transmitting and receiving end. We successfully demonstrated a long-distance field trial of E/W-Band wireless transmission, achieving 26.8-km wireless delivery of 32-Gb/s quadrature phase shift keying (QPSK) signal, and <italic>the largest net-rate-distance-product</i> up to 745.74 Gb/s·km per antenna per channel. The long-distance transmission performance of different modulation formats was also studied. We also achieved a 22-Gb/s QPSK transmission over a longer distance of 30.4 km, with a net-rate and distance product reaching 581.56 Gb/s·km. Moreover, this paper analyzes the complex sea surface channel and experimentally verifies the influence of the sea surface environment on the channel, which is instructive for long-distance MMW sea surface communications.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1794-1805"},"PeriodicalIF":4.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1109/JLT.2024.3496519
Gang Qiao;Yu Yang;Honglin Ji;Shuailuo Huang;Chengbin Long;Yuyang Gao;Mingqing Zuo;Jiarui Zhang;Zhaopeng Xu;Qi Wu;Shangcheng Wang;Lulu Liu;Lei Shen;Jie Luo;Zhixue He;Yongqi He;Weisheng Hu;Zhangyuan Chen;Juhao Li
Space-division multiplexing (SDM) technology by exploring fiber cores and linearly-polarized (LP) modes in few-mode multicore fibers (FM-MCF) as spatial channels is highly expected to break the capacity bottleneck of long-haul optical fiber transmission systems. However, the utility of LP modes is seriously impeded by huge computation complexity induced by inter-modal multiple-input multiple-output digital signal processing (MIMO-DSP) when the modal crosstalk in the fiber link is not strictly suppressed. In this paper, we propose a sparse mode-division multiplexing (MDM) scheme for weakly-coupled FM-MCF long-haul transmission, in which only a set of non-adjacent LP modes in each fiber core are selected to be active channels to significantly suppress inter-modal crosstalk. A multiple-ring-core 6-LP-mode 7-core fiber with low crosstalk is first designed and fabricated. The all-fiber spatial multiplexer and demultiplexer matched with the weakly-coupled FM-MCF are realized, which achieve low insertion loss and low crosstalk among all the spatial channels. Then, experimental recirculating-loop FM-MCF transmission system is established to verify the feasibility of the proposed sparse-MDM scheme. 205.8-Tb/s transmission over 1170-km 2-mode (LP01/LP02) 7-core weakly-coupled FM-MCF is experimentally demonstrated only utilizing 2×2 MIMO-DSP. 14 SDM × 180 wavelength-division multiplexing (WDM) channels across C-band bearing 24.5-Gbaud dual-polarization quadrature phase shift keying (DP-QPSK) signals are adopted. The proposed scheme could achieve high compatibility with conventional single-mode optical transceivers, and may pave the way for near-term long-haul SDM transmission applications.
{"title":"205.8-Tb/s Weakly-Coupled 2-Mode 7-Core Transmission Over 1170-km FM-MCF Only Using 2×2 MIMO-DSP","authors":"Gang Qiao;Yu Yang;Honglin Ji;Shuailuo Huang;Chengbin Long;Yuyang Gao;Mingqing Zuo;Jiarui Zhang;Zhaopeng Xu;Qi Wu;Shangcheng Wang;Lulu Liu;Lei Shen;Jie Luo;Zhixue He;Yongqi He;Weisheng Hu;Zhangyuan Chen;Juhao Li","doi":"10.1109/JLT.2024.3496519","DOIUrl":"https://doi.org/10.1109/JLT.2024.3496519","url":null,"abstract":"Space-division multiplexing (SDM) technology by exploring fiber cores and linearly-polarized (LP) modes in few-mode multicore fibers (FM-MCF) as spatial channels is highly expected to break the capacity bottleneck of long-haul optical fiber transmission systems. However, the utility of LP modes is seriously impeded by huge computation complexity induced by inter-modal multiple-input multiple-output digital signal processing (MIMO-DSP) when the modal crosstalk in the fiber link is not strictly suppressed. In this paper, we propose a sparse mode-division multiplexing (MDM) scheme for weakly-coupled FM-MCF long-haul transmission, in which only a set of non-adjacent LP modes in each fiber core are selected to be active channels to significantly suppress inter-modal crosstalk. A multiple-ring-core 6-LP-mode 7-core fiber with low crosstalk is first designed and fabricated. The all-fiber spatial multiplexer and demultiplexer matched with the weakly-coupled FM-MCF are realized, which achieve low insertion loss and low crosstalk among all the spatial channels. Then, experimental recirculating-loop FM-MCF transmission system is established to verify the feasibility of the proposed sparse-MDM scheme. 205.8-Tb/s transmission over 1170-km 2-mode (LP<sub>01</sub>/LP<sub>02</sub>) 7-core weakly-coupled FM-MCF is experimentally demonstrated only utilizing 2×2 MIMO-DSP. 14 SDM × 180 wavelength-division multiplexing (WDM) channels across C-band bearing 24.5-Gbaud dual-polarization quadrature phase shift keying (DP-QPSK) signals are adopted. The proposed scheme could achieve high compatibility with conventional single-mode optical transceivers, and may pave the way for near-term long-haul SDM transmission applications.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1934-1940"},"PeriodicalIF":4.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-11DOI: 10.1109/JLT.2024.3496477
Daniele Orsuti;Benjamin J. Puttnam;Ruben S. Luís;Manuel S. Neves;Menno van den Hout;Giammarco Di Sciullo;Divya A. Shaji;Budsara Boriboon;Georg Rademacher;Jun Sakaguchi;Cristian Antonelli;Chigo Okonkwo;Paulo P. Monteiro;Fernando P. Guiomar;Luca Palmieri;Hideaki Furukawa
We demonstrate parametric optical frequency comb (OFC) regeneration based on a transmitted seed in a high spatial density SDM fiber with 114 spatial channels and a seed distribution core. We show that such a fiber is compatible with ultra-high data rate links in a recently proposed network architecture that exploits the synergy between SDM fibers and OFC technology, extending this network concept to include few-mode cores for the first time. The employed OFCs support the generation of 650 x 25 GHz-spaced carriers covering the S/C/L-band for a total useful bandwidth of 134 nm, i.e., 50% wider than previously demonstrated with an OFC. Data rates of approximately 330 Tb/s per few-mode core are measured, with a potential of more than 12.7 Pb/s per fiber. We show that the use of OFCs for both transmission and detection simplifies coherent reception with a 3 orders of magnitude lower frequency offset compared to conventional intradyne schemes. We also show that the phase coherence among the comb carriers can be exploited to share digital signal processing (DSP) resources among the received channels. These results demonstrate the potential of OFCs for high-capacity networking, capable of replacing hundreds of transceiver lasers in each node and simplifying the DSP through the use of coherent and frequency-locked carriers.
{"title":"S/C/L-Band Transmission in Few-Mode MCF With Optical Frequency Comb Regeneration via Single-Mode Core Seed Distribution","authors":"Daniele Orsuti;Benjamin J. Puttnam;Ruben S. Luís;Manuel S. Neves;Menno van den Hout;Giammarco Di Sciullo;Divya A. Shaji;Budsara Boriboon;Georg Rademacher;Jun Sakaguchi;Cristian Antonelli;Chigo Okonkwo;Paulo P. Monteiro;Fernando P. Guiomar;Luca Palmieri;Hideaki Furukawa","doi":"10.1109/JLT.2024.3496477","DOIUrl":"https://doi.org/10.1109/JLT.2024.3496477","url":null,"abstract":"We demonstrate parametric optical frequency comb (OFC) regeneration based on a transmitted seed in a high spatial density SDM fiber with 114 spatial channels and a seed distribution core. We show that such a fiber is compatible with ultra-high data rate links in a recently proposed network architecture that exploits the synergy between SDM fibers and OFC technology, extending this network concept to include few-mode cores for the first time. The employed OFCs support the generation of 650 x 25 GHz-spaced carriers covering the S/C/L-band for a total useful bandwidth of 134 nm, i.e., 50% wider than previously demonstrated with an OFC. Data rates of approximately 330 Tb/s per few-mode core are measured, with a potential of more than 12.7 Pb/s per fiber. We show that the use of OFCs for both transmission and detection simplifies coherent reception with a 3 orders of magnitude lower frequency offset compared to conventional intradyne schemes. We also show that the phase coherence among the comb carriers can be exploited to share digital signal processing (DSP) resources among the received channels. These results demonstrate the potential of OFCs for high-capacity networking, capable of replacing hundreds of transceiver lasers in each node and simplifying the DSP through the use of coherent and frequency-locked carriers.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1786-1793"},"PeriodicalIF":4.1,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10750396","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-11DOI: 10.1109/JLT.2024.3496314
Zijian Li;Chen Ding;Qiarong Xiao;Qijie Xie;Chaoran Huang;Chester Shu
We propose and experimentally demonstrate an all-fiber reconfigurable comb spacing multiplier based on parametric and Raman-assisted spectral Talbot effect. In proof-of-concept experiments, our method transforms a Gaussian-shaped optical frequency comb (OFC) initially spaced at 13.5 GHz into 94.5-GHz and 108-GHz spaced OFCs in a fully programmable fashion, achieving different multiplication factors. This transformation is realized through the collaborative combination of linear Talbot effect and non-linear Raman-assisted four-wave mixing (FWM) in a Kerr medium. The generated OFCs exhibit significantly expanded comb spacing, enhanced carrier-to-noise ratio (CNR) of up to 35 dB, and practical power levels (> −10 dBm) for each frequency tone. These attributes are feasible for high-data-rate coherent communications. We have successfully demonstrated 81-km coherent optical transmission using the widely spaced combs, modulating individual frequency tones with 40 GBaud probabilistic constellation shaping (PCS) 64-QAM signals. Additionally, the reconfigurable comb spacing can benefit other potential applications including broadband spectroscopy, bandwidth-flexible optical networking, and photonic neuromorphic computing.
{"title":"Raman Spectral Talbot Amplifier: A Subsystem for Producing Customizable Broadband Optical Frequency Combs","authors":"Zijian Li;Chen Ding;Qiarong Xiao;Qijie Xie;Chaoran Huang;Chester Shu","doi":"10.1109/JLT.2024.3496314","DOIUrl":"https://doi.org/10.1109/JLT.2024.3496314","url":null,"abstract":"We propose and experimentally demonstrate an all-fiber reconfigurable comb spacing multiplier based on parametric and Raman-assisted spectral Talbot effect. In proof-of-concept experiments, our method transforms a Gaussian-shaped optical frequency comb (OFC) initially spaced at 13.5 GHz into 94.5-GHz and 108-GHz spaced OFCs in a fully programmable fashion, achieving different multiplication factors. This transformation is realized through the collaborative combination of linear Talbot effect and non-linear Raman-assisted four-wave mixing (FWM) in a Kerr medium. The generated OFCs exhibit significantly expanded comb spacing, enhanced carrier-to-noise ratio (CNR) of up to 35 dB, and practical power levels (> −10 dBm) for each frequency tone. These attributes are feasible for high-data-rate coherent communications. We have successfully demonstrated 81-km coherent optical transmission using the widely spaced combs, modulating individual frequency tones with 40 GBaud probabilistic constellation shaping (PCS) 64-QAM signals. Additionally, the reconfigurable comb spacing can benefit other potential applications including broadband spectroscopy, bandwidth-flexible optical networking, and photonic neuromorphic computing.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1962-1971"},"PeriodicalIF":4.1,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-08DOI: 10.1109/JLT.2024.3494694
Yonghang Sun;James Salamy;Caitlin E. Murray;Xiaotian Zhu;Brent E. Little;Roberto Morandotti;Arnan Mitchell;Sai T. Chu;David J. Moss;Bill Corcoran
We self-injection locked two free-running DFB lasers to two adjacent resonances of microring resonators (MRRs) to enhance the lasers frequency spacing stability. The frequency spacing stability between the two locked lasers was $< $300 MHz while locking to a $sim$0.5 million Q microring with $sim$19.6 GHz free spectral range (FSR), improving to $< $100 MHz level after locking to a $sim$1.5 million Q microring with $sim$25.2 GHz FSR. The locked lasers were modulated with dual polarisation 16-QAM signals with $< $1 GHz guard-band between two channels, and the MRR locked DFB lasers achieved similar performance to commercial external cavity lasers in the coherent communication system.
{"title":"Self-Locking of Free-Running DFB Lasers to a Single Microring Resonator for Dense WDM","authors":"Yonghang Sun;James Salamy;Caitlin E. Murray;Xiaotian Zhu;Brent E. Little;Roberto Morandotti;Arnan Mitchell;Sai T. Chu;David J. Moss;Bill Corcoran","doi":"10.1109/JLT.2024.3494694","DOIUrl":"https://doi.org/10.1109/JLT.2024.3494694","url":null,"abstract":"We self-injection locked two free-running DFB lasers to two adjacent resonances of microring resonators (MRRs) to enhance the lasers frequency spacing stability. The frequency spacing stability between the two locked lasers was <inline-formula><tex-math>$< $</tex-math></inline-formula>300 MHz while locking to a <inline-formula><tex-math>$sim$</tex-math></inline-formula>0.5 million Q microring with <inline-formula><tex-math>$sim$</tex-math></inline-formula>19.6 GHz free spectral range (FSR), improving to <inline-formula><tex-math>$< $</tex-math></inline-formula>100 MHz level after locking to a <inline-formula><tex-math>$sim$</tex-math></inline-formula>1.5 million Q microring with <inline-formula><tex-math>$sim$</tex-math></inline-formula>25.2 GHz FSR. The locked lasers were modulated with dual polarisation 16-QAM signals with <inline-formula><tex-math>$< $</tex-math></inline-formula>1 GHz guard-band between two channels, and the MRR locked DFB lasers achieved similar performance to commercial external cavity lasers in the coherent communication system.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1995-2002"},"PeriodicalIF":4.1,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-07DOI: 10.1109/JLT.2024.3493855
Xin Li;Sajay Bhuvanendran Nair Gourikutty;Jiaqi Wu;Teck Guan Lim;Pengfei Guo;Jaye Charles Davies;Edward Sing Chee Koh;Boon Long Lau;Ming Chinq Jong;Ser Choong Chong;San Sandra;Chao Li;Guo-Qiang Lo;Surya Bhattacharya;Jason Tsung-Yang Liow
Co-packaged optics (CPO) has emerged as a promising solution to address the limitations of traditional pluggable optical transceivers, offering enhanced bandwidth, improved energy efficiency, and reduced signal loss. This paper presents a low-cost, volume-manufacturable Fan-Out Wafer Level Packaging (FOWLP) silicon photonic engine with an aggregate data transmission capacity of 1.79 Tbps (8 × 224 Gbps). The FOWLP platform enables the seamless integration of Electronic ICs (EICs) and Photonic ICs (PICs) without wire bonds, preserving signal integrity and minimizing losses. By demonstrating 112 Gbaud NRZ (112 Gbps/λ) and PAM4 (224 Gbps/λ) transmission with minimal digital signal processing, this work highlights the potential of silicon photonics for 200 Gbps/λ Co-Packaged Optics (CPO) and Linear Pluggable Optics (LPO) applications. The findings underscore the enhanced signal integrity, power efficiency, and reduced latency achieved with FOWLP, addressing critical bottlenecks in hyperscale data centers and AI/ML clusters.
{"title":"1.6 Tbps FOWLP-Based Silicon Photonic Engine for Co-Packaged Optics","authors":"Xin Li;Sajay Bhuvanendran Nair Gourikutty;Jiaqi Wu;Teck Guan Lim;Pengfei Guo;Jaye Charles Davies;Edward Sing Chee Koh;Boon Long Lau;Ming Chinq Jong;Ser Choong Chong;San Sandra;Chao Li;Guo-Qiang Lo;Surya Bhattacharya;Jason Tsung-Yang Liow","doi":"10.1109/JLT.2024.3493855","DOIUrl":"https://doi.org/10.1109/JLT.2024.3493855","url":null,"abstract":"Co-packaged optics (CPO) has emerged as a promising solution to address the limitations of traditional pluggable optical transceivers, offering enhanced bandwidth, improved energy efficiency, and reduced signal loss. This paper presents a low-cost, volume-manufacturable Fan-Out Wafer Level Packaging (FOWLP) silicon photonic engine with an aggregate data transmission capacity of 1.79 Tbps (8 × 224 Gbps). The FOWLP platform enables the seamless integration of Electronic ICs (EICs) and Photonic ICs (PICs) without wire bonds, preserving signal integrity and minimizing losses. By demonstrating 112 Gbaud NRZ (112 Gbps/λ) and PAM4 (224 Gbps/λ) transmission with minimal digital signal processing, this work highlights the potential of silicon photonics for 200 Gbps/λ Co-Packaged Optics (CPO) and Linear Pluggable Optics (LPO) applications. The findings underscore the enhanced signal integrity, power efficiency, and reduced latency achieved with FOWLP, addressing critical bottlenecks in hyperscale data centers and AI/ML clusters.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1979-1986"},"PeriodicalIF":4.1,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10747125","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, the novel and simple transceiver digital signal processing for a coherent system with Tomlinson-Harashima pre-coding was proposed and digitally implemented at 1 sample/symbol speed for the low power consumption with the high optical power at the transmitter output. The performance of beyond 200 GBd PDM-16QAM signals were evaluated with a system of 74 GHz bandwidth at −3 dB down frequency. The sampling speed of digital-to-analog converter was equal to the symbol rate. The archivable information rates were 1.82 Tb/s and 1.73 Tb/s for the back-to-back and 130 km SSMF transmission, respectively, with 240 GBd PDM-16QAM signals. The net data rates were 1.67 Tb/s and 1.57 Tb/s, respectively, with the assumption of the LDPC code rates of 8/9, 5/6 and an outer BCH code rate of 0.9922. To the best of our knowledge, this work achieved the highest net data rate among the recent reports of coherent experiment beyond 200 GBd with the sampling speed of digital-to-analog converter to be lower than 264 GSa/s. The transmission distance of 130 km was much longer than the other reports. In the receiver DSP, the common issue of timing recovery function for such kind of faster-than-Nyquist signal was solved at 1 sample/symbol processing speed with the adaptive equalizer aided algorithm. The timing recovery performance was confirmed by compensating the sampling error with the monitored jitter of lower than −35 dB.
{"title":"240 GBd PDM-16QAM Single-Carrier Coherent Transmission Beyond 130 km SSMF for a Bandwidth Limited System With Low Power Consumption DSP","authors":"Guoxiu Huang;Yo Nakamura;Hisao Nakashima;Takeshi Hoshida","doi":"10.1109/JLT.2024.3492732","DOIUrl":"https://doi.org/10.1109/JLT.2024.3492732","url":null,"abstract":"In this paper, the novel and simple transceiver digital signal processing for a coherent system with Tomlinson-Harashima pre-coding was proposed and digitally implemented at 1 sample/symbol speed for the low power consumption with the high optical power at the transmitter output. The performance of beyond 200 GBd PDM-16QAM signals were evaluated with a system of 74 GHz bandwidth at −3 dB down frequency. The sampling speed of digital-to-analog converter was equal to the symbol rate. The archivable information rates were 1.82 Tb/s and 1.73 Tb/s for the back-to-back and 130 km SSMF transmission, respectively, with 240 GBd PDM-16QAM signals. The net data rates were 1.67 Tb/s and 1.57 Tb/s, respectively, with the assumption of the LDPC code rates of 8/9, 5/6 and an outer BCH code rate of 0.9922. To the best of our knowledge, this work achieved the highest net data rate among the recent reports of coherent experiment beyond 200 GBd with the sampling speed of digital-to-analog converter to be lower than 264 GSa/s. The transmission distance of 130 km was much longer than the other reports. In the receiver DSP, the common issue of timing recovery function for such kind of faster-than-Nyquist signal was solved at 1 sample/symbol processing speed with the adaptive equalizer aided algorithm. The timing recovery performance was confirmed by compensating the sampling error with the monitored jitter of lower than −35 dB.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1874-1880"},"PeriodicalIF":4.1,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10746600","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We investigate the effect of mode dispersion on the variance of the nonlinear interference (NLI) in weakly-coupled cohe rent space-division multiplexed (SDM) transmissions based on few-mode fibers (FMFs). We present an extended Gaussian noise model that incorporates mode dispersion in both the intra- and inter-group NLI. We show that the random spatial mode dispersion (SMD) of quasi-degenerate mode groups has a significant role in setting the dependence of the NLI variance on the systematic and deterministic differential mode group delay (DMGD) between mode groups. After validating the model by comparison with the split-step Fourier method, we use it to isolate different nonlinear effects and provide insights into how they interact with SMD and DMGD. The theoretical model exhibits great accuracy in fast computation times, making it a valuable tool for a comprehensive investigation of nonlinear FMF transmissions.
{"title":"Effects of Mode Dispersion on the Nonlinear Interference in Few-Mode Fiber Transmissions","authors":"Chiara Lasagni;Paolo Serena;Alberto Bononi;Antonio Mecozzi;Cristian Antonelli","doi":"10.1109/JLT.2024.3492344","DOIUrl":"https://doi.org/10.1109/JLT.2024.3492344","url":null,"abstract":"We investigate the effect of mode dispersion on the variance of the nonlinear interference (NLI) in weakly-coupled cohe rent space-division multiplexed (SDM) transmissions based on few-mode fibers (FMFs). We present an extended Gaussian noise model that incorporates mode dispersion in both the intra- and inter-group NLI. We show that the random spatial mode dispersion (SMD) of quasi-degenerate mode groups has a significant role in setting the dependence of the NLI variance on the systematic and deterministic differential mode group delay (DMGD) between mode groups. After validating the model by comparison with the split-step Fourier method, we use it to isolate different nonlinear effects and provide insights into how they interact with SMD and DMGD. The theoretical model exhibits great accuracy in fast computation times, making it a valuable tool for a comprehensive investigation of nonlinear FMF transmissions.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1604-1614"},"PeriodicalIF":4.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10746361","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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