Based on a silicon platform, we design and fabricate a four-mode division(de)multiplexer for chip-scale optical data transmission in the 2 μm waveband for the first time, to the best of our knowledge. The(de)multiple...Based on a silicon platform, we design and fabricate a four-mode division(de)multiplexer for chip-scale optical data transmission in the 2 μm waveband for the first time, to the best of our knowledge. The(de)multiplexer is composed of three tapered directional couplers for both mode multiplexing and demultiplexing processes. In the experiment, the average crosstalk for four channels is measured to be less than-18 dB over a wide wavelength range(70 nm) from 1950 to 2020 nm, and the insertion losses are also assessed. Moreover, we further demonstrate stable 5 Gbit/s direct modulation data transmission through the fabricated silicon photonic devices with nonreturn-to-zero on–off keying signals. The experimental results show clear eye diagrams, and the penalties at a bit error rate of 3.8 × 10-3 are all less than 2.5 dB after on-chip data transmission. The obtained results indicate that the presented silicon four-mode division multiplexer in the mid-infrared wavelength band might be a promising candidate facilitating chip-scale high-speed optical interconnects.展开更多
The emergence of dynamic optical switching has opened up new perspectives for lightening the ever growing load on the electrical switches and routers,to meet the increasing demand on high-speed and flexible data proce...The emergence of dynamic optical switching has opened up new perspectives for lightening the ever growing load on the electrical switches and routers,to meet the increasing demand on high-speed and flexible data processing and management in fiber-optic communications.Despite diversity schemes of optical switching in the single-mode regime,multi-mode switching of the hybrid fiber and chip system enabled by photonic integrated circuits,especially for the fiber-chip-fiber system,is still an outstanding challenge.Here,we propose and demonstrate the mode and polarization transmission and switching fiber-chip-fiber system with few-mode fibers(FMFs),including the FMF links for mode-and polarization-division multiplexing data transmission,the femtosecond(fs)-laser inscribed 3-dimensional(3D)photonic lantern silica chip for(de)multiplexing and coupling between FMFs and chip,and the topology-optimized N×N non-blocking 2-dimensional(2D)silicon switch array chip for switching and routing.Using 30-Gbaud quadrature phase-shift keying signals on wavelength-division multiplexing(WDM)channels,the WDM-compatible hybrid mode/polarization transmission,switching and routing system with FMFs,fs-laser inscribed silica(de)multiplexing chip and silicon switch array chip are demonstrated in the experiment with favorable operation performance.The demonstration may open the door for developing robust multi-dimensional optical data processing in fiber-optic communication systems with versatile fibers and chips.展开更多
基金National Natural Science Foundation of China(NSFC)(61761130082,11574001,11774116,61705072)Royal Society-Newton Advanced Fellowship+4 种基金National Program for Support of Top-notch Young ProfessionalsNatural Science Foundation of Hubei Province(2018CFA048,ZRMS2017000413)Beijing University of Posts and Telecommunications(BUPT))(IPOC2018A002)Program for HUST Academic Frontier Youth Team(2016QYTD05)Fundamental Research Funds for the Central Universities(2019kfyRCPY037)
文摘Based on a silicon platform, we design and fabricate a four-mode division(de)multiplexer for chip-scale optical data transmission in the 2 μm waveband for the first time, to the best of our knowledge. The(de)multiplexer is composed of three tapered directional couplers for both mode multiplexing and demultiplexing processes. In the experiment, the average crosstalk for four channels is measured to be less than-18 dB over a wide wavelength range(70 nm) from 1950 to 2020 nm, and the insertion losses are also assessed. Moreover, we further demonstrate stable 5 Gbit/s direct modulation data transmission through the fabricated silicon photonic devices with nonreturn-to-zero on–off keying signals. The experimental results show clear eye diagrams, and the penalties at a bit error rate of 3.8 × 10-3 are all less than 2.5 dB after on-chip data transmission. The obtained results indicate that the presented silicon four-mode division multiplexer in the mid-infrared wavelength band might be a promising candidate facilitating chip-scale high-speed optical interconnects.
基金National Key R&D Program of China(2019YFB2203604)National Natural Science Foundation of China(NSFC)(62125503,62261160388)+3 种基金Key R&D Program of Hubei Province of China(2020BAB001,2021BAA024)Key R&D Program of Guangdong Province(2018B030325002)Shenzhen Science and Technology Program(JCYJ20200109114018750)Innovation Project of Optics Valley Laboratory(OVL2021BG004).
文摘The emergence of dynamic optical switching has opened up new perspectives for lightening the ever growing load on the electrical switches and routers,to meet the increasing demand on high-speed and flexible data processing and management in fiber-optic communications.Despite diversity schemes of optical switching in the single-mode regime,multi-mode switching of the hybrid fiber and chip system enabled by photonic integrated circuits,especially for the fiber-chip-fiber system,is still an outstanding challenge.Here,we propose and demonstrate the mode and polarization transmission and switching fiber-chip-fiber system with few-mode fibers(FMFs),including the FMF links for mode-and polarization-division multiplexing data transmission,the femtosecond(fs)-laser inscribed 3-dimensional(3D)photonic lantern silica chip for(de)multiplexing and coupling between FMFs and chip,and the topology-optimized N×N non-blocking 2-dimensional(2D)silicon switch array chip for switching and routing.Using 30-Gbaud quadrature phase-shift keying signals on wavelength-division multiplexing(WDM)channels,the WDM-compatible hybrid mode/polarization transmission,switching and routing system with FMFs,fs-laser inscribed silica(de)multiplexing chip and silicon switch array chip are demonstrated in the experiment with favorable operation performance.The demonstration may open the door for developing robust multi-dimensional optical data processing in fiber-optic communication systems with versatile fibers and chips.
