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Ultra-compact wavelength multiplexer/demultiplexer based on subwavelength grating-assisted multimode interference coupler by inverse design 认领 引用
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作者 WEN Jin PAN Yu +1 位作者 WU Zhengwei ZHANG Ying 《Optoelectronics Letters》 EI 2025年第9期513-519,共7页
We proposed and demonstrated the ultra-compact 1310/1550 nm wavelength multiplexer/demultiplexer assisted by subwavelength grating(SWG)using particle swarm optimization(PSO)algorithm in silicon-on-insulator(SOI)platfo... We proposed and demonstrated the ultra-compact 1310/1550 nm wavelength multiplexer/demultiplexer assisted by subwavelength grating(SWG)using particle swarm optimization(PSO)algorithm in silicon-on-insulator(SOI)platform.Through the self-imaging effect of multimode interference(MMI)coupler,the demultiplexing function for 1310 nm and 1550 nm wavelengths is implemented.After that,three parallel SWG-based slots are inserted into the MMI section so that the effective refractive index of the modes can be engineered and thus the beat length can be adjusted.Importantly,these three SWG slots significantly reduce the length of the device,which is much shorter than the length of traditional MMI-based wavelength demultiplexers.Ultimately,by using the PSO algorithm,the equivalent refractive index and width of the SWG in a certain range are optimized to achieve the best performance of the wavelength demultiplexer.It has been verified that the device footprint is only 2×30.68μm2,and 1 dB bandwidths of larger than 120 nm are acquired at 1310 nm and 1550 nm wavelengths.Meanwhile,the transmitted spectrum shows that the insertion loss(IL)values are below 0.47 dB at both wavelengths when the extinction ratio(ER)values are above 12.65 dB.This inverse design approach has been proved to be efficient in increasing bandwidth and reducing device length. 展开更多
关键词 subwavelength grating swg using effective refractive index mmi section subwavelength grating multimode interference coupler inverse design particle swarm optimization pso algorithm demultiplexing function
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Two-Mode Converters at 1.3μm Based on Multimode Interference Couplers on InP Substrates 认领 引用 被引量：2
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作者 郭菲 陆丹 +3 位作者 张瑞康 王会涛 王圩 吉晨 《Chinese Physics Letters》 SCIE EI CAS CSCD 2016年第2期39-42,共4页
Two-mode converters at 1.3μm, aiming at applications in mode-division multiplexing in Ethernet systems, are proposed and experimentally demonstrated. Based on multimode interference couplers, the two-mode converters ... Two-mode converters at 1.3μm, aiming at applications in mode-division multiplexing in Ethernet systems, are proposed and experimentally demonstrated. Based on multimode interference couplers, the two-mode converters with 50% and 66% mode conversion efficiencies are designed and fabricated on InP substrates. AIode conver- sion from the fundamental mode （TEo） to the first order mode （TE1） is successfully demonstrated within the wavelength range of 1280-1320nm. The 1.3-μm mode converters should be important devices in mode-division multiplexing systems in Ethernet systems. 展开更多
关键词 mode InP Two-Mode Converters at 1.3 m Based on Multimode Interference Couplers on InP Substrates of in TE on
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Unitary transformation of general nonoverlapping-image multimode interference couplers with any input and output ports 认领 引用
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作者 Ze-Zheng Li Wei-Hua Han Zhi-Yong Li 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第1期287-292,共6页
An explanation of optical unitary transformation is presented for general nonoverlapping-image multimode interference(MMI)couplers with any number of input and output ports.The light transformation in the MMI coupler ... An explanation of optical unitary transformation is presented for general nonoverlapping-image multimode interference(MMI)couplers with any number of input and output ports.The light transformation in the MMI coupler can be considered as an optical field matrix acting on an input light column vector.We investigate the general phase principle of output light image.The complete proof of nonoverlapping-image MMI coupler’s optical unitarity along with the phase analysis of matrix element is provided.Based on a two-dimensional finite-difference time-domain(2 D-FDTD)simulation,the unitary transformation is obtained for a 4×4 nonoverlapping-image MMI coupler within a deviation of 4×10-2 for orthogonal invariance and 8×10-2 for transvection invariance in the C-band spectral range.A compact 1×4 splitter based on cascaded MMI coupler is proposed,showing a phase deviation less than 5.4°while maintaining a low-loss performance in C-band spectra. 展开更多
关键词 multimode interference coupler optical unitary transformation integrated photonics
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Broadband all-optical wavelength conversion using a multimode interference coupler-based ring resonator on an SOI platform 认领 引用
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作者 LINYE HE YIXIANG LIU +5 位作者 CHENGANG ZHANG QIJIE XIE ZHIPENG LI LEI WANG FENG GAO FUYONG YUE 《Photonics Research》 SCIE EI CAS CSCD 2026年第6期2480-2489,共10页
On-chip effective and broadband wavelength conversion using modulated continuous wave is greatly needed in practical applications of optical communication and signal processing.While conventional directional couplerba... On-chip effective and broadband wavelength conversion using modulated continuous wave is greatly needed in practical applications of optical communication and signal processing.While conventional directional couplerbased ring(DC-ring)resonators can enhance wavelength conversion efficiency,their application in high-speed signal processing has been limited by stringent bandwidth constraints and high sensitivity to resonance conditions.We overcome this limitation by employing a multimode interference coupler-based ring(MMI-ring)resonator structure,which combines resonator-enhanced wavelength conversion efficiency with optical signal processing capabilities.Compared to conventional four-wave mixing implementations in waveguides or the DC-ring,our MMI-ring demonstrates superior conversion efficiency and broader operational bandwidth while preserving the original signal modulation format.Furthermore,this approach substantially reduces the required pump power for wavelength conversion,enabling integration with on-chip lasers and aligning with the trend toward miniaturized,integrated optical signal processing.The MMI-ring offers additional advantages of reduced sensitivity to temperature and wavelength variations,along with enhanced fabrication tolerance and stability.Using a low pump power of just 14 mW,we achieve a wavelength conversion efficiency of-34 dB,successfully demonstrate 10 Gbit/s signal transmission,and attain a conversion range covering 160 nm. 展开更多
关键词 modulated continuous wave broadband wavelength conversion chip optical processing signal processing signal processingwhile multimode interference coupler based ring resonator optical communication four wave mixing
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A novel DWDM inter leaver scheme based on phased-array wavelength demultiplexer with multimode interference couplers 认领 引用 被引量：3
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作者 陆思 严瑛白 金国藩 《Chinese Optics Letters》 EI CAS 2004年第6期314-315,共2页
A novel integrated dense wavelength division multiplexing interleaver scheme is presented based on phased-array (PHASAR) wavelength demultiplexer with multimode interference (MMI) couplers. MMI-PHASAR interleaver with... A novel integrated dense wavelength division multiplexing interleaver scheme is presented based on phased-array (PHASAR) wavelength demultiplexer with multimode interference (MMI) couplers. MMI-PHASAR interleaver with simple structure and compact si/e can reali/e narrow channel spacing through simple design procedure. And it is convenient for integration with integrated planar waveguide multiplexer/demultiplexers. A 25/50-GHz MMI-PHASAR interleaver is designed and the transmission characteristic is investigated by beasu propagation method. 展开更多
关键词 DWDM MMI A novel DWDM inter leaver scheme based on phased-array wavelength demultiplexer with multimode interference couplers
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Design and Fabrication of Ultracompact 3-dB MMI Coupler in Silicon-on-Insulator 认领 引用 被引量：1
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作者 严清峰 余金中 刘忠立 《Journal of Semiconductors》 CAS 北大核心 2003年第2期133-136,共4页
An ultracompact 3 dB coupler is designed and fabricated in silicon on insulator,based on 1×2 line tapered multimode interference (MMI) coupler.Comparing with the conventional straight MMI coupler,the device is ～... An ultracompact 3 dB coupler is designed and fabricated in silicon on insulator,based on 1×2 line tapered multimode interference (MMI) coupler.Comparing with the conventional straight MMI coupler,the device is ～40% shorter in length.The device exhibits uniformity of 1 3dB and excess loss of 2 5dB. 展开更多
关键词 multimode interference coupler line tapered waveguide silicon on insulator
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Performance Study of Silica-on-Silicon Based Multimode Interference (MMI) Optical Coupler 认领 引用 被引量：2
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作者 A. Zahed Chowdhury 《Photonic Sensors》 EI 2014年第1期34-42,共9页
In recent years, the silica-on-silicon based multimode interference （MMI） optical waveguide is an interesting research topic. It is being advanced various researches on the silica based MMI coupler. This paper repre... In recent years, the silica-on-silicon based multimode interference （MMI） optical waveguide is an interesting research topic. It is being advanced various researches on the silica based MMI coupler. This paper represents the considerations of the optimal design of the silica-on-silicon based MMI optical coupler for better performance. For that, we have illustrated the simulation results on a particular case of the 4x4 silica-on-silicon based MMI coupler. From the simulation results, it is seen that the performance of the MMI coupler depends on multiple width and length combinations of the MMI waveguide. The results also show that the width of the multimode waveguide could not be too small or too large for optimal performance, and at the widths, 100~tm, 120~tm and 130~tm, the performance could be optimized and be almost 0.62 - 0.64 in a given length range. Finally, the results have been compared with the optical coupler presently available in the market and show that the silica-on-silicon based MMI coupler is much more efficient in terms of losses and the performance associated with it and the size of the coupler. 展开更多
关键词 Optical coupler planar lightwave circuits （PLCs） silica-on-silicon waveguide multimode interference（MMI） coupler performance （PF）
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Experimental demonstration of a performance-enhanced optical quantizer based on adjoint shape optimization 认领 引用
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作者 Yijun He Jifang Qiu +4 位作者 Bowen Zhang Qiuyan Li Suping Jiao Yan Li Jian Wu 《Chinese Optics Letters》 SCIE EI CAS CSCD 2025年第4期86-90,共5页
We propose and demonstrate a performance-enhanced optical quantizer by inverse design.An adjoint shape cooptimization method is used to optimize the boundaries of the optical quantizer,aiming to reduce the insertion l... We propose and demonstrate a performance-enhanced optical quantizer by inverse design.An adjoint shape cooptimization method is used to optimize the boundaries of the optical quantizer,aiming to reduce the insertion loss(IL),improve the uniformity,and increase the bandwidth of the effective number of bits(ENOB).Meanwhile,the optimized shape maintains its deep ultraviolet(DUV)photolithography fabrication capability.We fabricate the device on a commercial silicon-on-insulator(SOI)platform.Measurement results show that the IL is reduced from 0.85 to 0.35 d B,and the uniformity is optimized from 1.21 to 0.24 d B at 1550 nm.The maximum ENOB increases to 3.31 bit,which is very close to the ideal value of 3.32 bit,and the bandwidth of the ENOB>3 bit is expanded to more than 50 nm. 展开更多
关键词 optical quantizer shape optimization multimode interference coupler
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