Article
Physics, Applied
Weicheng Chen, Jingwen Wu, Dian Wan, Jie Wang, Jiaqi Wang, Yi Zou, Zhenzhou Cheng, Tiegen Liu
Summary: The study demonstrated high coupling efficiency and bandwidth of subwavelength grating couplers in the spectral range of 2.2-2.5 μm. Reproducibility of fabricated grating couplers and design and fiber coupling tolerance were also investigated in the study.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Optics
Xu Han, Yongheng Jiang, Huifu Xiao, Mingrui Yuan, Thach Giang Nguyen, Andreas Boes, Guanghui Ren, Yong Zhang, Qinfen Hao, Yikai Su, Arnan Mitchell, Yonghui Tian
Summary: Grating-assisted contra-directional couplers are important optical components in photonic integrated circuits (PICs) and are used as fundamental building blocks for various applications. LNOI has emerged as an attractive PIC platform with multiple active photonic circuit components, but lacks some passive photonic circuit components. This study proposes, designs and experimentally demonstrates a subwavelength grating-assisted contra-directional coupler in a silicon nitride-loaded LNOI waveguide platform. A three-channel wavelength-division (de)multiplexer is fabricated and experimentally demonstrated using the proposed coupler.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Yu Qu, Lei Lei, Yu Yu, Xinliang Zhang, Ping Xu, Zhengfang Qian
Summary: In this paper, a new design of grating couplers (GCs) is proposed to overcome the limited optical bandwidth of traditional GCs caused by the wavelength's dependency on the coupling angle. This device combines a dual-broadband achromatic metalens (ML) with two focusing GCs to achieve excellent dual-broadband achromatic convergence. The ML-assisted GCs device exhibits a good broadband property, improving the coupling of spatial light with a wide spectrum.
Article
Engineering, Multidisciplinary
Ting Li, Pei Yuan, Shufeng Li, Ke Li, Lianqing Zhu
Summary: Fiber Bragg grating (FBG) interrogator is a scientific instrument that indirectly monitors physical quantities by detecting the center wavelength of FBG. An arrayed waveguide grating (AWG), a fundamental part of the FBG interrogation system, is designed and fabricated for a photonic integrated FBG interrogation system with 12 channels, a 3 dB bandwidth of 2.23 nm, insertion loss of less than 5 dB, and crosstalk of -16.64 dB. The AWG has a wavelength resolution of 8 pm and a wavelength accuracy of 10.59 pm in the dynamic range of 0.8 nm, making it suitable for FBG interrogation systems.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Optics
Jinsong Zhang, Luhua Xu, Deng Mao, Yannick D'Mello, Weijia Li, Stephane Lessard, David Plant
Summary: We propose an all-silicon design of a multi-band transverse-magnetic-pass (TM-pass) polarizer based on one-dimensional gratings that work under different polarization states. By multiplexing diffraction in the O-band and reflection in the S-, C-, and L-bands, the operation bandwidth can be extended with a tapered structure.
Article
Optics
Ke Li, Jingping Zhu, Qihang Duan, Yuzhou Sun, Xun Hou
Summary: The first ultra-broadband Bragg concave diffraction grating on a 220-nm silicon-on-insulator is presented, covering most telecommunication wavebands. Numerical simulations and design verification demonstrate the high performance of the grating in wavelength demultiplexing.
Article
Engineering, Electrical & Electronic
Siming Weng, Pei Yuan, Lidan Lu, Dongliang Zhang, Lianqing Zhu
Summary: In this study, a novel silicon-based AWG was designed and fabricated as a critical component for fiber Bragg grating interrogation systems. By modifying the input waveguide with an MMI coupler, the AWG achieved higher demodulation precision and wider dynamic range. The optimized AWG exhibited excellent performance with low crosstalk, wide dynamic range, and high resolution, showing great potential for fiber Bragg grating interrogation.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Shufeng Li, Pei Yuan, Ting Li, Ke Li, Lianqing Zhu
Summary: This article presents a 15-channel 400 GHz AWG based on silicon on insulator (SOI) substrate, which has good spectral characteristics and can be used as a spectral device in the fiber Bragg grating (FBG) interrogation system.
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2023)
Article
Optics
Jun Zou, Lingfeng Li, Changhui Wang, Yuan Zhuang, Xuyang Wang, Jinhua Hu, Shaobo Luo, Jian-Jun He
Summary: In this study, a novel micro-spectrometer with high-resolution and large-bandwidth is proposed and demonstrated. It utilizes an arrayed waveguide grating (AWG) and dual-wavelength grating couplers to operate at dual-wavelength band. The resolution of the micro-spectrometer is improved by employing time-division-multiplexing inputs, and the effective channel number is enlarged. Experimental results show that the fabricated device achieves 63 effective channels and resolutions of 0.5 and 0.442 nm at 1550 and 1310 nm bands, respectively.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Philippe Jean, Alexandre Douaud, Sophie LaRochelle, Younes Messaddeq, Wei Shi
Summary: Silicon subwavelength grating waveguides can be combined with high-index chalcogenide glass as a top cladding to modify waveguiding behavior, showcasing potential for modal confinement engineering and controlling light-matter interaction. The use of As20S80 with a negative thermo-optic coefficient allows for near-athermal behavior in these waveguides, with applications in reconfigurable photonics, nonlinear optics, metamaterials, or slow light.
Article
Materials Science, Multidisciplinary
Guanglian Cheng, Qiyuan Yi, Fanglu Xu, Min Yang, Zhiwei Yan, Qiyuan Li, Yongchao Zou, Yu Yu, Li Shen
Summary: Efficient fiber-chip couplers operating at distinct wavelength bands are designed and demonstrated in this study. The dual-band silicon-integrated grating coupler (GC) is capable of coupling 1.55 and 2 μm wavebands light simultaneously. Numerical simulations and experimental results show that the proposed device achieves high coupling efficiencies and enables wavelength division multiplexing transmission at 1.55 and 2 μm wavebands.
ADVANCED PHOTONICS RESEARCH
(2023)
Article
Optics
Siming Weng, Pei Yuan, Wei Zhuang, Dongliang Zhang, Fei Luo, Lianqing Zhu
Summary: This paper presents an 8-channel SOI-based AWG for a photonic integrated FBG interrogation microsystem. The AWG shows fine transmission spectrum with crosstalk below -16 dB and nonuniformity below 0.4 dB, making it suitable for high-dynamic-range demodulation. The proposed AWG has a large dynamic range of 1.2 nm, a resolution for measurements of 1.27 pm, and a high accuracy of 20.6 pm.
Article
Optics
Tarun Sharma, Vaibhav Rana, Jiaqi Wang, Zhenzhou Cheng, Yuzhi Chen, Youfu Geng, Xueming Hong, Xuejin Li, Kyoungsik Yu, Brajesh Kumar Kaushik
Summary: A grating-based narrowband wavelength selective reflector on silicon on insulator waveguide is proposed, which achieves a reflection of 96% with a full-width half maximum bandwidth of 1.5 nm at 1550 nm wavelengths by optimizing the dutycycle, grating-period, and side etching depth.
Article
Optics
Jiaxin Chen, Jinzhao Wang, Jiewen Li, Yong Yao, Yunxu Sun, Jiajun Tian, Yi Zou, Xiangjie Zhao, Xiaochuan Xu
Summary: To address the limitations of current silicon photonics based optical phased arrays, researchers have proposed an ultra-long waveguide grating antenna utilizing subwavelength segments to achieve small beam divergence and large field-of-view. By leveraging the bound state in the continuum effect, sidewall emission is effectively suppressed. This concept was theoretically demonstrated with a millimeter-long through-etched waveguide grating antenna that has compatible feature sizes with existing silicon photonics foundries.
Article
Optics
Mengjia Lu, Chunyu Deng, Yu Sun, Dongyu Wang, Lei Huang, Pengcheng Liu, Dongdong Lin, Wei Cheng, Tong Lin, Guohua Hu, Binfeng Yun, Yiping Cui
Summary: A compact asymmetrical directional coupler based on coupling between a conventional subwavelength grating and a bricked subwavelength grating is proposed to realize a broadband polarization beam splitter with high extinction ratio on a silicon-on-insulator platform.
OPTICS COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Wim Bogaerts, Sarvagya Dwivedi, Roelof Jansen, Xavier Rottenberg, Marcus S. Dahlem
Summary: The chip-based optical beam scanner utilizes a dispersive optical phased array to illuminate the far field with a pixelated pattern. By breaking up the OPA into manageable blocks with dispersive delay lines, it enables the scaling up of antennas. The power distribution of individual OPA antennas can control the sidelobes and the power in the main lobe in the far-field illumination.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Optics
Xin Guo, Yang Liu, Tangman Yin, Blair Morrison, Mattia Pagani, Okky Daulay, Wim Bogaerts, Benjamin J. Eggleton, Alvaro Casas-Bedoya, David Marpaung
Summary: Optical modulation plays a crucial role in microwave photonic systems, but the versatility to generate and transform analog optical modulation is currently lacking. Researchers have demonstrated a versatile radiofrequency photonic spectral shaper integrated in a silicon photonic circuit, which enhances the diversity of microwave photonic modulation. Using the spectral shaper, researchers showed electrically tailorable modulation transformations and a series of unprecedented RF filtering experiments through monolithic integration with reconfigurable ring resonators.
Article
Engineering, Electrical & Electronic
Domenico Spina, Yinghao Ye, Dirk Deschrijver, Wim Bogaerts, Tom Dhaene
Summary: CVF is a robust method for modeling linear and passive baseband systems efficiently and accurately, crucial for the analysis and design of modern communication systems. An efficient toolbox implementation of the CVF algorithm is introduced in this letter, illustrated on a suitable application example.
ELECTRONICS LETTERS
(2021)
Article
Multidisciplinary Sciences
Mi Wang, Xiangfeng Chen, Umar Khan, Wim Bogaerts
Summary: In this paper, a novel filter circuit that combines a double ring resonator with a balanced Mach-Zehnder interferometer (MZI) is proposed. The circuit offers increased configurability compared to conventional ring loaded MZI filters. The filter can be programmed using a combination of local and global optimization strategies, and has been tested in simulations and experiments.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Gaehun Jo, Pierre Edinger, Simon J. Bleiker, Xiaojing Wang, Alain Yuji Takabayashi, Hamed Sattari, Niels Quack, Moises Jezzini, Jun Su Lee, Peter Verheyen, Iman Zand, Umar Khan, Wim Bogaerts, Goran Stemme, Kristinn B. Gylfason, Frank Niklaus
Summary: The emerging fields of silicon photonic MEMS and optomechanics offer new possibilities for developing high-performance photonic devices with ultra-low power consumption. In this study, we demonstrate the wafer-level vacuum sealing of Si photonic MEMS inside cavities with ultra-thin caps featuring optical and electrical feedthroughs. The sealed cavities provide protection for the MEMS devices and enable optical and electrical connections between the inside and outside.
PHOTONICS RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Lukas Van Iseghem, Ewout Picavet, Alain Yuji Takabayashi, Pierre Edinger, Umar Khan, Peter Verheyen, Niels Quack, Kristinn B. Gylfason, Klaartje De Buysser, Jeroen Beeckman, Wim Bogaerts
Summary: Low-power and compact phase shifters are crucial for large photonic circuits. This work demonstrates a novel structure using liquid crystal for phase shifting, where the liquid crystal is locally deposited on the waveguide to achieve strong electric field control.
OPTICAL MATERIALS EXPRESS
(2022)
Proceedings Paper
Optics
Umar Khan, Iman Zand, Pierre Edinger, Gaehun Jo, Simon J. Bleiker, Alain Yuji Takabayashi, Cleitus Antony, Moises Jezzini, Giuseppe Talli, Hamed Sattari, Jun Su Lee, Arun Kumar Mallik, Peter Verheyen, Saurav Kumar, Cristina Lerma Arce, Marco Garcia, Tigers Jonuzi, Jan Watte, Niels Quack, Frank Niklaus, Kristinn B. Gylfason, Wim Bogaerts
Summary: We present our work in the European project MORPHIC to extend an established silicon photonics platform with low-power and non-volatile micro-electromechanical (MEMS) actuators to demonstrate large-scale programmable photonic integrated circuits (PICs).
INTEGRATED PHOTONICS PLATFORMS II
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Wim Bogaerts, Alain Yuji Takabayashi, Pierre Edinger, Gaehun Jo, Iman Zand, Peter Verheyen, Moises Jezzini, Hamed Sattari, Giuseppe Talli, Cleitus Antony, Mehrdad Saei, Cristina Lerma Arce, Jun Su Lee, Arun Kumar Mallik, Saurav Kumar, Marco Garcia, Tigers Jonuzi, Kristinn B. Gylfason, Niels Quack, Frank Niklaus, Umar Khan
Summary: This paper presents a method to extend silicon photonics with MEMS actuators for low-power, large scale programmable photonic circuits. By adding free-standing movable waveguides to the existing silicon photonics platform, phase shifters and tunable couplers can be implemented using electrostatically actuated MEMS. The MEMS devices are protected using wafer-level sealing and interfaced with custom multi-channel driver and readout electronics.
SMART PHOTONIC AND OPTOELECTRONIC INTEGRATED CIRCUITS 2022
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Jing Zhang, Emadreza Soltanian, Bahawal Haq, Stefan Ertl, Johanna Rimbock, Bozena Matuskova, Emanuele Pelucchi, Agnieszka Gocalinska, Joris Van Campenhout, Guy Lepage, Peter Verheyen, Wim Bogaerts, Gunther Roelkens
Summary: We present a C-band optical transmitter with an integrated widely-tunable III-V-on-silicon laser, fabricated using micro-transfer printing on the imec iSiPP50G platform. The back-to-back operation at 40 Gbit/s non-return-to-zero On-Off keying over the C-band is demonstrated.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Pierre Edinger, Alain Yuji Takabayashi, Carlos Errando-Herranz, Umar Khan, Cleitus Antony, Giuseppe Talli, Peter Verheyen, Wim Bogaerts, Niels Quack, Kristinn B. Gylfason
Summary: The research team has demonstrated a nonvolatile photonic MEMS pi-phase switch, which has low loss, low dispersion, and can be cycled through over 100 times with retention times over 12 hours. This technology opens up new possibilities for the development of programmable photonic chips.
2022 IEEE 35TH INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS CONFERENCE (MEMS)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Alain Y. Takabayashi, Duarte Silva, Hamed Sattari, Pierre Edinger, Peter Verheyen, Kristinn B. Gylfason, Wim Bogaerts, Niels Quack
Summary: Programmable photonics offers a wide range of optical functions and reduces the time and costs of photonic integrated circuit development. The primary challenge lies in the difficulty of increasing component density due to excessive power consumption. In this study, we propose a MEMS-based Silicon Photonic power coupler that provides high optical performance within a compact footprint, enabling power-efficient active function of fast and continuous power tuning.
2022 IEEE 35TH INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS CONFERENCE (MEMS)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Wim Bogaerts, Lukas Van Iseghem, Pierre Edinger, Hamed Sattari, Alain Yuji Takabayashi, Xiangfeng Chen, Hong Deng, Peter Verheyen, Antonio Ribeiro, Umar Khan, Niels Quack, Kristinn B. Gylfason
Summary: Photonic integrated circuits are becoming more complex with the emergence of programmable photonic circuits, requiring many tunable photonic elements. Progress has been made in developing compact, low-power silicon photonics actuators based on heaters, liquid crystal, and MEMS that can be scaled up to large circuits.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Pierre Edinger, Kristofer Kristinsson, Carlos Errando-Herranz, Alain Yuji Takabayashi, Hamed Sattari, Niels Quack, Peter Verheyen, Wim Bogaerts, Kristinn B. Gylfason
Summary: The newly developed MEMS phase shifter has advantages in terms of range, speed, and loss, enabling low-power tuners in silicon photonics.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Mi Wang, Xiangfeng Chen, Umar Khan, Wim Bogaerts
Summary: A novel filter circuit incorporating a balanced Mach-Zehnder interferometer loaded with a double coupled ring resonator is proposed, with a global optimization method applied to optimize the auto-regression/moving average (ARMA) filter to a specific target function.
2021 IEEE 17TH INTERNATIONAL CONFERENCE ON GROUP IV PHOTONICS (GFP 2021)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Hong Deng, Wim Bogaerts
Summary: The configurable modulator demonstrated in this study, implemented with a silicon Mach-Zehnder interferometer featuring a plasma dispersion modulator and tunable couplers, can function as a phase modulator or intensity modulator with optimized modulation response.
2021 IEEE 17TH INTERNATIONAL CONFERENCE ON GROUP IV PHOTONICS (GFP 2021)
(2021)
