Explanipedia

Dual modulation of phase and intensity based on cascaded DML and EAM Open

Acai Tan, Zhengxuan Li, Sheng Luo, Yiyang Feng, Y.P. Wang , et al. · 2025

We propose a dual modulation scheme that integrates phase and intensity modulation, enabled by a directly modulated laser (DML) and an electro-absorption modulator (EAM). Unlike conventional intensity modulation schemes, we employ the freq…

Rose Petal‐Inspired Random Lasers on Flexible PET Substrates for Achieving Wavelength Tunability and Speckle‐Free Imaging (Advanced Optical Materials 21/2025) Open

Ja‐Hon Lin, Shao‐Chien Pan, Song Zheng, Yangwei Huang, Jung‐Chen Tung , et al. · 2025

Pulse duration tunable ultra-narrow bandwidth mode-locked lasers Open

Weixi Li, Lilong Dai, Qianqian Huang Qianqian Huang, Meng Zou, Xiangpeng Xiao , et al. · 2025

A Compact High-Precision Cascade PID-Control Laser Driver for Airborne Coherent LiDAR Applications Open

Zixuan Ming, Xianzhuo Li, Yanyi Wang, Yuanzhe Qu, Zhiyong Lu , et al. · 2025

This paper solves the challenge of precise dual-frequency laser control in Airborne Coherent Doppler LiDAR systems by implementing an innovative laser driver architecture, which integrates compact hardware design with cascade Proportional-…

Chirp-free hundred-picosecond pulse fiber laser based on carbon nanotubes mode-locker Open

Wei‐Xi Li, Kailin Jiang, 戴礼龙 Dai Lilong, Qianqian Huang, Meng Zou , et al. · 2025

We demonstrate a narrow bandwidth passively erbium-doped mode-locked fiber laser based on single-wall carbon nanotubes (SWCNTs). The center wavelength is 1546.61 nm. The strong filtering effect and low saturable absorber (SA) modulation de…

An approach for improving the distorted structured light in holographic optical tweezers Open

Yingxiong Song, Zhengshu Zhang, Yiming Shen, Xionggui Tang · 2025

Optical tweezers have been widely used for optical manipulation of various particles. At present, there are different type of optical tweezers. Among them, holographic optical tweezers have attracted growing attention as a powerful tools f…

Joint frequency offset estimation and adaptive equalization for a coherent passive optical network Open

Yiyang Feng, Zhengxuan Li, Chenyu Liu, Bingyao Cao, Lilin Yi , et al. · 2025

Multimode Miniature Polarization-Sensitive Metamaterial Absorber with Ultra-Wide Bandwidth in the K Band Open

Zhonghang Ji, Yingxiong Song, Mandi Gao, Qiong Zhang, Yunqing Liu · 2024

Metamaterial absorbers have gained widespread applications in fields such as sensing, imaging, and electromagnetic cloaking due to their unique absorption characteristics. This paper presents the design and fabrication of a novel K-band po…

Optical carrier regeneration based on injection locking for single-sideband self-coherent detection Open

Siyu Luo, Zhengxuan Li, Bingyao Cao, Lilin Yi, Yingxiong Song · 2024

In this work, we demonstrate a low-cost electro-absorption modulated laser (EML)-based coherent receiver enabled by the injection locking technique in a 32-Gb/s single-sideband (SSB) transmission system. We focus on analyzing the harmonic …

A 2 μm Wavelength Band Low-Loss Spot Size Converter Based on Trident Structure on the SOI Platform Open

Zhutian Wang, Chenxi Xu, Zhiming Shi, Nan Ye, Hairun Guo , et al. · 2024

A 2 μm wavelength band spot size converter (SSC) based on a trident structure is proposed, which is coupled to a lensed fiber with a mode field diameter of 5 μm. The cross-section of the first segment of the tapered waveguide structure in …

Net 835-Gb/s/λ Carrier- and LO-Free 100-km Transmission Using Channel-Aware Phase Retrieval Reception Open

Hanzi Huang, Haoshuo Chen, Qian Hu, Di Che, Yetian Huang , et al. · 2024

We experimentally demonstrate the first carrier- and LO-free 800G/λ receiver enabling direct compatibility with standard coherent transmitters via phase retrieval, achieving net 835-Gb/s transmission over 100-km SMF and record 8.27-b/s/Hz …

Self-injection locked low-noise Brillouin random fiber laser via dynamic fiber grating for QAM coherent communication Open

Liang Zhang, Haozhe Shou, Yiyang Feng, Zhengxuan Li, Mengshi Zhu , et al. · 2024

A low-noise Brillouin random fiber laser (BRFL) based on dynamic fiber grating (DFG)-assisted self-injection locking (SIL) as a laser carrier for coherent communication is proposed and experimentally demonstrated. The utilization of the DF…

Impact and Compensation of Electrical-to-Optical Frequency Response on Carrierless Phase Retrieval Receivers Open

Qi Gao, Hanzi Huang, Zhengxuan Li, Ziyue Liu, Yuanzhe Qu , et al. · 2024

On carrierless phase retrieval (PR) receivers based on direct detection, bandwidth limitation of electrical-to-optical (E/O) conversion at the transmitter side (Tx) distorts the modulated optical signal. In this paper, we propose the Gerch…

Improving orbital angular momentum mode transmission with imperfect ring–core fiber Open

Xiaohui Wang, Yongze Yu, Dongdong Deng, Shuai Mao, Yang Wang , et al. · 2024

Orbital angular momentum (OAM), inherent to light beams characterized by helical phase fronts, represents an alternative spatial degree of freedom for photons. In recent years, OAM-based communication has gained significant attention as a …

Simple real-time high-sensitivity heterodyne coherent optical transceiver at intraplane satellite communication Open

Yuanzhe Qu, Qianwu Zhang, Yanyi Wang, Yanhao Chen, Lewei Gong , et al. · 2024

In this paper, we demonstrate a high-sensitivity and real-time heterodyne coherent optical transceiver for intraplane satellite communication, without digital-to-analog converter (DAC) devices and an optical phase lock loop (OPLL). Based o…

Distortion-Aware Phase Retrieval Receiver for High-Order QAM Transmission with Carrierless Intensity-Only Measurements Open

Hanzi Huang, Haoshuo Chen, Qi Gao, Yetian Huang, Nicolas K. Fontaine , et al. · 2023

We experimentally investigate transmitting high-order quadrature amplitude modulation (QAM) signals with carrierless and intensity-only measurements with phase retrieval (PR) receiving techniques. The intensity errors during measurement, i…

On-chip metamaterial-enabled high-order mode-division multiplexing Open

Yu He, Xingfeng Li, Yong Zhang, Shaohua An, Hongwei Wang , et al. · 2023

Mode-division multiplexing (MDM) technology enables high-bandwidth data transmission using orthogonal waveguide modes to construct parallel data streams. However, few demonstrations have been realized for generating and supporting high-ord…

The Low-Loss Spot Size Converter for Alignment with Cleaved Single Mode Fiber Open

Jinyang Zhao, Zhutian Wang, Nan Ye, Fufei Pang, Yingxiong Song · 2023

Integrating the graded index (GRIN) waveguide with the 2-D inversely-tapered waveguide, a new design of spot size converter (SSC) has been proposed to couple the light beam between the cleaved single-mode fiber (SMF) and the silicon (Si) w…

Numerical study of microstructured fiber with concentric dual rings for supporting orbital angular momentum mode propagation Open

Xiaohui Wang, Yongze Yu, Haoyu Gu, Dongdong Deng, Yang Wang , et al. · 2023

A microstructured fiber with two concentric high-refractive-index rings is proposed to support more orbital angular momentum (OAM) beam propagations and OAM-based mode-division multiplexing (MDM) for improving the channel capacity and spec…

Digital mobile fronthaul based on delta-sigma modulation employing a simple self-coherent receiver Open

Siyu Luo, Zhengxuan Li, Fan Chen, Xiaoguang Zhu, Kailin Lv , et al. · 2022

The coherent digital radio-over-fiber (DRoF) system is a promising candidate for future mobile fronthaul networks (MFNs) due to its high receiver sensitivity and excellent robustness against nonlinearities. However, conventional coherent r…

Photo-Generation of Tunable Microwave Carriers at 2 µm Wavelengths Using Double Sideband with Carrier Suppression Modulation Open

Di Ji, Zhitao Hu, Nan Ye, Fufei Pang, Yingxiong Song · 2022

At 2 µm wavelengths (149.9 THz), hollow-core photonics band gap fibers have higher light power damage thresholds, stable polarization states, and lower losses of 0.1 dB/km. Additionally, a thulium-doped fiber amplifier can provide a gain o…

SOA Amplified 100 Gb/s/λ PAM-4 TDM-PON Supporting PR-30 Power Budget with >18 dB Dynamic Range Open

Zhengxuan Li, Yuwen Li, Siyu Luo, Fan Yin, Yuming Wang , et al. · 2022

Semiconductor optical amplifier (SOA) is considered an excellent candidate for power amplification at O-band due to its low cost and small footprint. In passive optical networks (PONs), SOA is popular as a booster and pre-amplifier to impr…

Geo2-Doped Hybrid Photonic Crystal Fiber For Orbital Angular Momentum Mode Propagation Open

Xiaohui Wang, Yongze Yu, Haoyu Gu, Deng Dongdong, Wang Yang , et al. · 2022

Demonstration of a 50G-PON with a 45-dB power budget using an IQ-interleaved coherent detection scheme Open

Zhengxuan Li, Fan Yin, Xingang Huang, Zhuang Ma, Yingxiong Song , et al. · 2021

The application of traditional coherent detection technology to optical access networks has been undermined due to its high complexity and high cost. In this paper, we propose a novel IQ-interleaved detection method which uses the preset f…

Digital Interference Mitigation in Space Division Multiplexing Self-Homodyne Coherent Detection Open

Hanzi Huang, Yetian Huang, Haoshuo Chen, Qianwu Zhang, Jian Chen , et al. · 2021

We propose a digital interference mitigation scheme to reduce the impact of mode coupling in space division multiplexing self-homodyne coherent detection and experimentally verify its effectiveness in 240-Gbps mode-multiplexed transmission…

1.23-Tb/s per Wavelength Single-Waveguide On-Chip Optical Interconnect Enabled by Mode-division Multiplexing Open

Hanzi Huang, Yetian Huang, Yu He, Haoshuo Chen, Yong Zhang , et al. · 2020

We experimentally demonstrate a record net capacity per wavelength of 1.23~Tb/s over a single silicon-on-insulator (SOI) multimode waveguide for optical interconnects employing on-chip mode-division multiplexing and 11$\times$11 multiple-i…

137 Gb/s PAM-4 Transmissions at 850 nm over 40 cm Optical Backplane with 25 G Devices with Improved Neural Network-Based Equalization Open

Qianwu Zhang, Yuntong Jiang, Hai Zhou, Chuanlu Deng, Shuaihang Duan , et al. · 2019

An improved neural network-based equalization method is proposed and experimentally demonstrated. The up-to-137 Gb/s transmission of four level pulse amplitude modulation (PAM-4) signals with 25 G class 850 nm optical devices is achieved o…

Mode- and wavelength-multiplexed transmission with crosstalk mitigation using a single amplified spontaneous emission source Open

Yetian Huang, Haoshuo Chen, Hanzi Huang, Zhengxuan Li, Nicolas K. Fontaine , et al. · 2019

We propose to use the low-coherence property of amplified spontaneous emission (ASE) noise to mitigate optical crosstalk, such as spatial, polarization, and modal crosstalk, which currently limits the density of photonic integration and fi…

A Simple Joint Modulation Format Identification and OSNR Monitoring Scheme for IMDD OOFDM Transceivers Using K-Nearest Neighbor Algorithm Open

Qianwu Zhang, Hai Zhou, Yuntong Jiang, Bingyao Cao, Yingchun Li , et al. · 2019

In this study, a joint modulation format identification and optical signal-to-noise ratio (OSNR) monitoring algorithm is proposed and experimentally demonstrated using the k-nearest neighbor algorithm for intensity modulation and direct de…

Transfer learning assisted deep neural network for OSNR estimation Open

Le Xia, Jing Zhang, Shaohua Hu, Mingyue Zhu, Yingxiong Song , et al. · 2019

We propose a transfer learning assisted deep neural network (DNN) method for optical-signal-to-noise ratio (OSNR) monitoring and realize fast remodel to response to various system parameters changing, e.g. optical launch power, residual ch…

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