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| 1 | On-chip programmable pulse processor employing cascaded MZI-MRR structure显示文摘Optical pulse processor meets the urgent demand for high-speed,ultra wideband devices,which can avoid electrical confinements in various fields,e.g.,alloptical communication,optical computing technology,cohcrcnt control and microwave fields.To date,great efforts have been madc particularly in on-chip programmable pulse proccessing.Here,we experimentally demonstrate a programmable pulse proceesor employing 16cascaded Mach-Zehnder interferometer coupled microring resonator(MZI-MRR)structure based on silicon-oninsulator wafer.With micro-heaters loaded to the device,both amplitude and frequency tunings can be realized in each MZI-MRR unit.Thanks to its reconfigurability and integration ability,First,it can serve as a fractional differentiator whose tuning range is 0.51-2.23 with deviation no more than 7%.Second,the device can be tuned into a programmable optical filter whose bandwidth varies from 0.15to 0.97nm.The optical filter is also shape tunable.Especially,15-channel wavelength selective switches are generated. | Yuhe ZHAO Xu WANG Dingshan GAO Jianji DONG Xinliang ZHANG | 2019 | Frontiers of Optoelectronics2019，12，2： | 9 |
| 2 | Wideband adaptive microwave frequency identification using an integrated silicon photonic scanning filter显示文摘Photonic-assisted microwave frequency identification with distinct features, including wide frequency coverage and fast tunability, has been conceived as a key technique for applications such as cognitive radio and dynamic spectrum access. The implementations based on compact integrated photonic chips have exhibited distinct advantages in footprint miniaturization, light weight, and low power consumption, in stark contrast with discrete optical-fiber-based realization. However, reported chip-based instantaneous frequency measurements can only operate at a single-tone input, which stringently limits their practical applications that require wideband identification capability in modern RF and microwave applications. In this article, we demonstrate, for the first time, a wideband, adaptive microwave frequency identification solution based on a silicon photonic integrated chip,enabling the identification of different types of microwave signals from 1 to 30 GHz, including single-frequency,multiple-frequency, chirped-frequency, and frequency-hopping microwave signals, and even their combinations.The key component is a high Q-factor scanning filter based on a silicon microring resonator, which is used to implement frequency-to-time mapping. This demonstration opens the door to a monolithic silicon platform that makes possible a wideband, adaptive, and high-speed signal identification subsystem with a high resolution and a low size, weight, and power(SWaP) for mobile and avionic applications. | XU WANG FENG ZHOU DINGSHAN GAO YANXIAN WEI XI XIAO SHAOHUA YU JIANJI DONG XINLIANG ZHANG | 2019 | Photonics Research2019，7，2： | 3 |
| 3 | Compact and broadband multimode waveguide bend by shape-optimizing with transformation optics显示文摘Multimode waveguide bend is one of the key components for realizing high-density mode-division multiplexing systems on chip.However,the reported multimode waveguide bends are either large,bandwidth-limited or fabrication-complicated,which hinders their applications in future high-density multimode photonic circuits.Here we propose a compact multimode waveguide bend supporting four TE modes simply by shape-optimizing with transformation optics.The shape of the waveguide is optimized in the virtual space with gradient distribution of the refractive index,so that the scattering loss and intermode cross talk are well suppressed.After conformal mapping back into the physical space,a compact(effective radius of 17μm)multimode bending waveguide is obtained.Simulations show that the proposed multimode waveguide bend has little loss(<0.1 dB)and low cross talk(<−20 dB)throughout an ultrabroad wavelength range of 1.16–1.66μm.We also fabricated the shape-optimized multimode bending waveguide on a silicon-on-insulator wafer.At 1550 nm wavelength,the measured excess losses for the four lowest-order TE modes are less than 0.6 dB,and the intermode cross talks are all below−17 dB.Our study paves the way for realizing high-density and large-scale multimode integrated optical circuits for optical interconnect. | SHUYI LI LIFENG CAI DINGSHAN GAO JIANJI DONG JIN HOU CHUNYONG YANG SHAOPING CHEN XINLIANG ZHANG | 2020 | Photonics Research2020，8，12： | 3 |
| 4 | An efficient directional coupling from dielectric waveguide to hybrid long-range plasmonic waveguide on a silicon platform显示文摘 | Chen Lin Li Xun Gao Dingshan | 2013 | Applied Physics B2013，111，： | 1 |
| 5 | Nonlinear equation method for band structure calculations of photonic crystal slab显示文摘 | Dingshan Gao D S Zhou Z P | 2006 | Applied Physics Letters2006，88，16： | 1 |
| 6 | Simultaneous multi-channel RZ-OOK/DPSK to NRZ-OOK/DPSK format conversion based on integrated delay interferometers and arrayed-waveguide grating显示文摘Format conversion is enabling function at the interface of different networks with different optimal modulation formats.Meanwhile,multi-channel signal processing function has its special significance for dense wavelength division multiplexing networks.In this paper,we designed and fabricated a delay interferometer cascaded with an arrayed-waveguide grating based on silicon on insulator.The 4-channel return-to-zero on-off keying(RZ-OOK) to non-return-to-zero on-off keying(NRZ-OOK) and return-to-zero differential phase shift keying(RZ-DPSK) to non-return-to-zero differential phase shift keying(NRZ-DPSK) format conversions at 40 Gbit/s were realized with this integrated device,the output eye diagrams showed a good conversion performance.Thanks to the mature fabrication technology,this device shows great potential for its small size,low power consumption and possibility of monolithic integration. | XIANG Lei GAO DingShan ZOU BingRong HU ShouJin ZHANG XinLiang | 2013 | Chinese Science Bulletin2013，58，7： | 1 |
| 7 | Integrated photonic convolution acceleration core for wearable devices显示文摘With the advancement of deep learning and neural networks,the computational demands for applications in wearable devices have grown exponentially.However,wearable devices also have strict requirements for long battery life,low power consumption,and compact size.In this work,we propose a scalable optoelectronic computing system based on an integrated optical convolution acceleration core.This system enables high-precision computation at the speed of light,achieving 7-bit accuracy while maintaining extremely low power consumption.It also demonstrates peak throughput of 3.2 TOPS(tera operations per second)in parallel processing.We have successfully demonstrated image convolution and the typical application of an interactive first-person perspective gesture recognition application based on depth information.The system achieves a comparable recognition accuracy to traditional electronic computation in all blind tests. | Baiheng Zhao Junwei Cheng Bo Wu Dingshan Gao Hailong Zhou Jianji Dong | 2023 | Opto-Electronic Science2023，2，12： | 1 |
| 8 | Silicon-based optoelectronics:progress towards large scale optoelectronic integration and applications显示文摘In the past half century,silicon-based microelectronics and optical fiber communication have triggered a far-reaching information technology revolution,which has moved human society into a high-speed information age.The demand for communication capacity and speed is growing exponentially.On the other hand,data center and high-performance computing are facing bottlenecks of speed,bandwidth,and energy consumption of electrical interconnections. | Dingshan Gao Zhiping Zhou | 2022 | Frontiers of Optoelectronics2022，15，2： | 0 |
| 9 | Ultrafast polarization optical switch constructed from one-dimensional photonic crystal and its performance analysis显示文摘All-optical switch with the ultrafast optical switching rate is a key device in the next generation optical network.In this article,we propose a polarization switch with ps switching time,which is constructed from one-dimensional resonant photonic crystal(1D RPC).The model of switch operating at 1.5 μm is established based on the optical stark effect(OSE).We calculate the performance indices of the switch and the influences of errors of periods and refractive index on the performance characteristics. | WANG Tao LI Qing GAO DingShan | 2009 | Chinese Science Bulletin2009，54，20： | 0 |
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