Article
Materials Science, Ceramics
S. Muthu Mariappan, Aslam Khan, Mohd Shkir
Summary: In this study, Pr-doped Co3O4 thin films were prepared using spray coating technique, and their optoelectronic and nonlinear optical properties were investigated. The results show that Pr has significant effects on the crystal structure, band gap, energy levels, and optical response of Co3O4.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Yanzhen Zheng, Changzheng Sun, Bing Xiong, Lai Wang, Zhibiao Hao, Jian Wang, Yanjun Han, Hongtao Li, Jiadong Yu, Yi Luo
Summary: This paper reports GaNOI microresonators with intrinsic quality factors over 2.5 million, corresponding to an optical loss of 0.17 dB cm(-1). It demonstrates a parametric oscillation threshold power as low as 6.2 mW and estimates the experimentally extracted nonlinear index of GaN at telecom wavelengths to be n(2) = 1.4 x 10(-18) m(2) W-1, which is several times larger than that of commonly used platforms such as Si3N4, LiNbO3, and AlN. The large intrinsic nonlinear refractive index, together with its broadband transparency window and high refractive index contrast, make GaNOI a promising platform for chip-scale nonlinear applications.
LASER & PHOTONICS REVIEWS
(2022)
Review
Optics
Yuning Zhang, Jiayang Wu, Linnan Jia, Yang Qu, Yunyi Yang, Baohua Jia, David J. Moss
Summary: Integrated photonic devices operating via optical nonlinearities offer a powerful solution for all-optical information processing, and graphene oxide (GO) has attracted significant attention for its large optical nonlinearity and facile fabrication processes. This paper reviews the applications of GO to nonlinear integrated photonics, including its optical properties, fabrication technologies, and the state-of-the-art GO nonlinear integrated photonic devices. The challenges and future opportunities in this field are also discussed.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Hao Chen, Jiatong Li, Zhenyuan Shang, Guoqing Wang, Ziming Zhang, Zexing Zhao, Mengyu Zhang, Jinde Yin, Jinzhang Wang, Kai Guo, Junbo Yang, Peiguang Yan
Summary: Due to the slowdown of Moore's law, integrated photonic devices have become an important route for the development of large-scale optical communications. Researchers have designed and fabricated an integrated nonlinear optical switch using the inverse-design method, which exhibits significant intensity-dependent transmission at 1.5 μm waveband and has potential applications.
LASER & PHOTONICS REVIEWS
(2022)
Review
Chemistry, Analytical
Ehsan Mobini, Daniel H. G. Espinosa, Kaustubh Vyas, Ksenia Dolgaleva
Summary: This review provides a comprehensive overview of AlGaAs nonlinear waveguide platforms, including their geometries, nonlinear optical performances, and measured values and wavelength dependencies of their effective nonlinear coefficients. The state-of-the-art achievements in the field, such as tunable wavelength converters, on-chip frequency-comb generation, and ultra-broadband on-chip supercontinuum generation, are highlighted. The potential applications of AlGaAs nonlinear functional devices, such as all-optical signal processing in optical communication networks and integrated quantum photonic circuits, are also discussed.
Article
Optics
Xulun Zhang, Lixia Xi, Jiacheng Wei, Shucheng Du, Wenbo Zhang, Jianping Li, Xiaoguang Zhang
Summary: Polarization mode dispersion (PMD) is a crucial property of standard single-mode fibers, affecting signal transmission and system performance. This study introduces an NFD-PMD model and a corresponding equalization scheme, which outperforms traditional methods according to simulation results.
Article
Chemistry, Multidisciplinary
Minjuan Li, Ziyi Wang, Belal Ahmed, Yanqiang Li, Han Wang, Yipeng Song, Xianyu Song, Xiaojun Kuang, Junhua Luo, Sangen Zhao
Summary: This work presents a novel second-order nonlinear optical material, [C(NH2)(3)](3)C3N3S3 (GU(3)TMT), composed of pi-conjugated planar (C3N3S3)(3-) and triangular [C(NH2)(3)](+) groups. Surprisingly, GU(3)TMT exhibits a remarkable NLO response (2.0xKH(2)PO(4)) and a moderate birefringence (0.067 at 550 nm), despite the unfavorable arrangement of (C3N3S3)(3-) and [C(NH2)(3)](+) in its structure. First-principles calculations indicate that the NLO properties mainly originate from the highly pi-conjugated (C3N3S3)(3-) rings, while the pi-conjugated [C(NH2)(3)](+) triangles contribute less to the overall NLO response. This work will stimulate further exploration of the role of pi-conjugated groups in NLO crystals.
Article
Optics
P. S. Ryzhikov, V. A. Makarov
Summary: This paragraph describes various characteristics of the nth order nonlocal nonlinear optical susceptibility relations that emerge in the absence of absorption.
LASER PHYSICS LETTERS
(2022)
Article
Optics
Haonan Ling, Arnab Manna, Jialiang Shen, Ho-Ting Tung, David Sharp, Johannes Froch, Siyuan Dai, Arka Majumdar, Artur R. Davoyan
Summary: This study investigates the interaction between light and matter in van der Waals MoS2 nanophotonic devices and demonstrates deep subwavelength optical field confinement in nanostructures, which has the potential to significantly reduce the size of integrated photonic devices and opto-electronic circuits.
Article
Optics
Mathias Hedegaard Kristensen, Peter Kjaer Kristensen, Kjeld Pedersen, Esben Skovsen
Summary: This communication demonstrates a new characterization technique that combines FT spectroscopy and SHG to achieve high spectral resolution with broadband femtosecond laser pulses. By showcasing the capabilities of the method with the strong and narrow exciton resonances of ZnO, FT-SHG offers high reproducibility and resolution within the bandwidth of the input pulse.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
Stijn Sackesyn, Chonghuai Ma, Joni Dambre, Peter Bienstman
Summary: This study investigates the application of optical techniques in mitigating nonlinearity in optical fiber networks, demonstrating the potential and performance advantages of photonic reservoirs in reducing nonlinear distortions.
Review
Nanoscience & Nanotechnology
Sylvain Gennaro, Raktim Sarma, Igal Brener
Summary: This review summarizes the research on controlling optical wavefronts and enhancing nonlinear effects using metasurfaces with arrays of nanoscale resonators. The study focuses on the generation of harmonic light in GaAs metasurfaces and all-dielectric metasurfaces coupled to intersubband transitions in III-V semiconductor heterostructures. The review concludes by discussing the potential of metasurfaces as a platform for on-chip quantum light generation.
Review
Optics
Marc Hanna, Florent Guichard, Nour Daher, Quentin Bournet, Xavier Delen, Patrick Georges
Summary: Multipass cells serve as a platform for nonlinear optics, allowing for nonlinear distribution, enhancing robustness of the beam, and exploring various nonlinear phenomena, with engineering potential.
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
H. Lemziouka, F. Nekkach, A. Boutahar, R. Moubah, L. H. Omari, M. Filali, A. Rjeb, H. Lassri, M. Abid, E. K. Hlil, M. El Yazidi
Summary: The crystal structure, morphology, and optical properties of Co-doped Ba1-xCoxTiO3 were studied. XRD confirmed that the samples crystallized in the perovskite phase, with a transition to pseudo-cubic phase observed upon Co doping. Co doping caused a decrease in the band gap and changes in the electronic levels associated with lattice defects. Optical parameters such as refractive index and optical conductivity were extracted and linked to the Co content. Analysis of the linear and nonlinear optical parameters revealed an increase in the NLOp refractive index and third-order NLOp susceptibility with increasing Co content.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Optics
P. S. Ryzhikov, V. A. Makarov
Summary: Using energy and momentum conservation laws, this paper derived the intrinsic symmetry relations for the nonlocal nonlinear optical susceptibility tensor in lossless nth order nonlinear medium of arbitrary symmetry class, for the case when less than n + 1 electromagnetic waves with different frequencies interact. The focus is on the relations of the components of this tensor, which cannot be obtained as limiting case from the symmetry relations for the nonlocal nonlinear susceptibility tensor describing interaction of exactly n + 1 waves with different frequencies. The examples of these symmetry relations for degenerate second- and third-order processes often considered are given.
LASER PHYSICS LETTERS
(2023)
Article
Optics
Zhi-Huan Pang, Meng Liu, Ai-Ping Luo, Yi Xu, Wen-Cheng Xu, Songnian Fu, Zhi-Chao Luo
Summary: We propose a novel mode-dependent gain equalizer using a few-mode chirped fiber Bragg grating (FM-CFBG) to effectively mitigate the mode-dependent gain in an all-fiber 2-mode EDFA. The equalizer based on FM-CFBG offers compact size, low insertion loss, and wavelength scalability, making it meaningful for long-haul MDM transmission.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yiwei Qiu, Chenliang Ding, Gangyao Zhan, Mengdi Luo, Jisen Wen, Mengbo Tang, Chun Cao, Wenjie Liu, Liang Xu, Bihu Lv, Dazhao Zhu, Cuifang Kuang, Xu Liu
Summary: This article proposes a novel method to simultaneously reduce the axial and lateral feature sizes of PPI-DLW. By employing a pseudo 3D hollow focus, a suspended nanowire with an isotropic 30-nm feature size was realized, thereby improving the capabilities of PPI-DLW for fabricating arbitrary 3D structures.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Manzhuo Wang, Jianbo Yue, Zhentao Yao, Tingyu Liu, Xiaoqiang Sun, Yuanda Wu, Daming Zhang
Summary: A silica waveguide 1×8 thermo-optic switch consisting of cascaded three-stage Mach-Zehnder interferometers (MZIs) is successfully demonstrated. The switch utilizes a multimode interference (MMI) coupler in the MMI-MZI 1×2 switch unit for its wavelength insensitivity and favorable fabrication tolerance. The switch design and optimization is based on the beam propagation method (BPM) and implemented using standard CMOS technologies. Experimental results show that the switch meets the requirements for insertion loss and crosstalk at 1550 nm wavelength, and also performs well in a wide wavelength range.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
H. M. de la Cruz, E. D. Hernandez-Campos, E. Ortiz-Ricardo, A. Martinez-Borquez, I. Rosas-Roman, V. Contreras, G. Ramos-Ortiz, B. Mendoza-Santoyo, Cecilia I. Zurita-Lopez, R. Castro-Beltran
Summary: Acoustic levitation is an important contactless manipulation technique in various fields. This study presents an affordable phased-array levitator that can stably trap micrometer dye-doped droplets in the air, enabling the creation of microlasers. The levitated microlasers exhibit comparable optical lasing features to On-a-Chip devices, with a maximum Q-factor of approximately 105 and a minimum lasing threshold of approximately 150 nJ cm-2.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yuqi Wang, Zilong Zhang, Suyi Zhao, Wei He, Xiaotian Li, Xin Wang, Yuchen Jie, Changming Zhao
Summary: This paper investigates the impact of localized defects in SLM devices on structured light generation and demonstrates the reconstructed light field results under different defect states using CGH loaded onto the DMD. The results show that central defects have minimal influence on the reconstructed light field, while edge defects have a significant impact. This study expands the application scenarios for the generation of structured light beams with SLM.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ashraf A. A. Beshr, Hossam El-Din Fawzy, Ehab A. A. Eldin, Jong Wan Hu, Fathi A. Abdelmgeed
Summary: This paper introduces the application of digital measuring techniques, specifically Digital Close Range Photogrammetry (DCRP), in the detection of deformation in post-tensioned structural elements (PTSEs). The use of digital equipment and a terrestrial laser scanner (TLS) allows for highly accurate monitoring of PTSE camber, with deviations not exceeding 0.01 mm.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Shihao Gou, Danping Huang, Shipeng Liao, Fan Luo, Yang Yuan, Liang Liu, Xiaomei Wen
Summary: This paper proposes an online intelligent detection method for cable pitch defects in the field of optical cable manufacturing. The method utilizes a multi-sensor fusion image acquisition platform and deep learning technology to achieve accurate detection of pitch defects in optical cables.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Tun-Yao Hung, David W. U. Chan, Ching-Wei Peng, Chi-Wai Chow, Hon Ki Tsang
Summary: We present the first experimental demonstration of a high-capacity short-reach optical communication link which utilizes LSTM and DNN to achieve 300 Gbit/s 8-level pulse amplitude modulation (PAM8) generated by a single microring modulator. The experimental results show that 300 Gbit/s and 270 Gbit/s PAM8 modulation can be achieved at back-to-back and after 1 km transmission respectively.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Long Zhang, Li Pei, Jianshuai Wang, Jingjing Zheng, Kaihua Hu, Zhiqi Li, Tigang Ning, Jing Li, Li Zhong, Ruisi He
Summary: The amplification of long-haul mode division multiplexing (MDM) transmission systems is currently achieved through three steps, which can result in complexity and degraded transmission performance. To address this issue, this paper proposes an in-line few-mode erbium-doped fiber amplifier (FM-EDFA) based on cladding pumping, which enables simultaneous amplification and transmission in MDM systems. Experimental results demonstrate that the in-line FM-EDFA has excellent performance and shows great potential for practical long-haul transmission systems.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Chong Wang, Miaomiao Li, Jiahao Yang, Bingli Zhu, Jianghao Han, Wenbin Dang
Summary: This paper introduces the design of drive circuits using step recovery diodes and RF bipolar transistors to produce narrow pulse lasers, achieving the reduction of system size, power consumption and cost.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ziqian Zhang, Liangyu Zhao, Chaorun Si, Yang Tian, Shilin Xu
Summary: A Hastelloy C276 coating was prepared on a martensitic stainless-steel substrate using laser melting deposition, resulting in a coating with high resistance to cavitation erosion. The coating exhibited a thick, progressively changing grain morphology from bottom to top, and the grains grew in a specific angle to the substrate plane. A compositional mixing zone was formed at the interface, forming a stable metallurgical bond. The coating showed a significantly improved hardness and enhanced resistance to cavitation erosion compared to the substrate.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Cui-Hong Li, Chao-Xiong He, Yuan-Yuan Ma, Jin-Chuan Wang, Ying Dong, Shao-Chong Zhu, Xiao-Wen Gao, Hui-Zhu Hu
Summary: In this paper, a non-contact optical measuring method for characterizing nanoparticles using optical tweezers is presented. The method relies on the optical polarization and scattering of nanoparticles, providing insights into both shape and size parameters. Experimental results show that the method can accurately measure the shape and size of nanoparticles, making it an effective tool for identifying and studying individual nanoparticles.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Magdalena Zieba, Cuma Tyszkiewicz, Katarzyna Wojtasik, Krystian Pavlov, Pawel Chaber, Ewa Gondek, Jacek Niziol, Roman Rogozinski, Pawel Kielan, Pawel Karasinski
Summary: This work presents a study on low-loss waveguide layers for planar evanescent wave sensor applications. Crack-free SiOx:TiOy composite layers with refractive indices of approximately 1.65 were fabricated using a sol-gel method and dip-coating technique. The fabricated layers exhibited good waveguide properties and optical homogeneity.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yali He, Jiao Tang, Zhongyang Li, Yaowu Hu
Summary: In this paper, a lithography-free broadband absorbing metasurface consisting of Ag nanoparticles with ultrafine nanogaps is demonstrated. The experimental results and numerical simulations show that the horizontally compressed Ag nanoparticles possess smaller nanogaps for high sensitivity, uniformity, and stability. The novel substrate also exhibits insensitivity to the incident or observation angle in an ambient environment and has promising practical applications.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Linqing Li, Chengwei Yang, Zhuo Wang, Kun Xiao, Rui Min
Summary: In this study, a stretchable polymer optical fiber with a sandwich structure was proposed for sleep monitoring. The fiber improved the pressure sensitivity of the mattress and enabled the measurement of respiratory rate, heart rate, and body motion information.
OPTICS AND LASER TECHNOLOGY
(2024)