Instrumentation and Measurements
Reducing statistical noise in frequency ratio measurement between Ca+ and Sr optical clocks with a frequency-synthesized local oscillator from a Sr optical clock
Haosen Shi, Bingkun Lu, Huaqing Zhang, Ruming Hu, Yuan Qian, Yao Huang, Tao Yang, Yuan Yao, Hongfu Yu, Zhanjun Fang, Kelin Gao, Hua Guan, Yige Lin, Yanyi Jiang, and Longsheng Ma
Photonics Research
  • Nov. 01, 2024
  • Vol. 12, Issue 11 (2024)
Nonlinear Optics
Linear and nonlinear coupling of light in twin-resonators with Kerr nonlinearity
Arghadeep Pal, Alekhya Ghosh, Shuangyou Zhang, Lewis Hill, Haochen Yan, Hao Zhang, Toby Bi, Abdullah Alabbadi, and Pascal Del’Haye
Photonics Research
  • Nov. 01, 2024
  • Vol. 12, Issue 11 (2024)
Physical Optics
Measuring the OAM spectrum of a fractional helical beam in a single shot
Tushar Sarkar, Jiapeng Cai, Xiang Peng, and Wenqi He
Photonics Research
  • Nov. 01, 2024
  • Vol. 12, Issue 11 (2024)
Imaging Systems, Microscopy, and Displays
Transport-of-intensity differential phase contrast imaging: defying weak object approximation and matched-illumination condition
Photonics Research
  • Nov. 01, 2024
  • Vol. 12, Issue 11 (2024)
Imaging Systems, Microscopy, and Displays
Multifunctional computational fluorescence self-interference holographic microscopy
Wenxue Zhang, Tianlong Man, Minghua Zhang, Hongqiang Zhou, Zenghua Liu, and Yuhong Wan
Photonics Research
  • Nov. 01, 2024
  • Vol. 12, Issue 11 (2024)
On the Cover
Nitride material has shown its potential for the ultraviolet light detection, which are valuable for both military and civil applications. However, the response ability is restricted by the low conductivity and limited carrier migration distance for that with high Al content. Benefiting from the unique characteristics and compatibility, the combination of 2D graphene with 3D nitride for the construction of van der Waals junction enlightens the advances of ultraviolet photodetectors. It is known that the device could be existed in lateral or vertical configuration, but the later one suffers from high fabrication and technique difficulties according to the dielectric inserting layer deposition or "Mesa" etching. Generally, the response behavior between these two types of devices is different, while none research has been focused on the distinction of device working mechanism and features, making their real application demands still not clear.
Photonics Research
  • Oct. 22, 2024
  • Vol. 12, Issue 9 (2024)
Editors' Picks
Flow vector measurement has important research significance and application value in fields of biomedicine, such as blood flow monitoring, quantitative drug delivery, and biochemical analysis. At present, laser feedback interferometry technology has been widely used in the field of velocity measurement by virtue of the merits of auto-alignment, and cavity gain, which can acquire the flow velocity information by monitoring the interference signal between the backscattered light and the original optical field in the cavity. However, the uncertainty of the feedback angle of incident light and scattered light causes a challenge in obtaining real-time velocity vector information. To solve these problems, Professor Liang Lu's team of Anhui University proposed a two-dimensional flow vector measurement system based on all-fiber laser feedback frequency-shifted multiplexing technology. Through innovative optical design, the two-dimensional vector velocity information can be decomposed into one-dimensional velocity information in the frequency domain. The distribution of the two-dimensional vector flow velocity in the pipeline is accurately identified from the rate distribution characteristics, and the incident angle of the laser beam on the fluid is also obtained. This work provides a highly efficient non-contact solution for 2D vector velocity sensing in various complex scenes. Relevant research results were recently published in Photonics Research, Volume 12, Issue 7, 2024.[ Lei Zhang, Jialiang Lv, Yunkun Zhao, Jie Li, Keyan Liu, Qi Yu, Hongtao Li, Benli Yu, Liang Lu, "Two-dimensional flow vector measurement based on all-fiber laser feedback frequency-shifted multiplexing technology," Photonics Res. 12, 1371 (2024)]
Photonics Research
  • Oct. 21, 2024
  • Vol. 12, Issue 7 (2024)
PR Highlights
The in-plane photonic integrated circuits (PICs) can integrate a large number of active and passive photonic devices in a monolithic integration manner or a hybrid integration manner on a common substrate. The in-plane PIC exhibits diverse functions like wavelength tuning, filtering, routing, amplifying, modulation, detection, power monitoring, and so on. In PICs, the wavelength tunable laser and the power monitor photodiode (PD) are basic blocks. Compared to the edge-emitting laser used for the in-plane PIC, vertical-cavity surface-emitting laser (VCSEL) has many advantages, such as high modulation speed, low cost, low power, small footprint, two-dimensional array configuration, on-wafer testing, and circular beam. Since the light emits normally to the substrate of the VCSEL, VCSELs are the ideal laser sources for the vertically integrated photonic systems. In the future, the three-dimensional (3D) vertically integrated photonic system based on VCSELs will be promising in artificial intelligence and 3D sensing. VCSELs will be the key devices in future 3D vertically integrated photonic systems.
Photonics Research
  • Oct. 21, 2024
  • Vol. 12, Issue 7 (2024)
Spotlight on Optics
Besides biochemical characteristics, mechanical properties (such as elasticity and viscosity) also play a crucial role in determining biological functions. Biomechanics is to study the mechanical changes in biological systems and how they respond to mechanical changes in the environment to help early diagnosis and treatment of diseases. However, despite tremendous progress thanks to mechanical measurement technologies like atomic force microscopy, we are still lacking viable techniques that can achieve non-contact measurements at high spatial resolution.
Photonics Research
  • Oct. 21, 2024
  • Vol. 12, Issue 4 (2024)
Top Downloads
Guan Wang, Huaxia Deng, Yu Cai, Mengchao Ma, Xiang Zhong, and Xinglong Gong
  • Photonics Research
  • Vol. 12, Issue 6, 1313 (2024)
Chengying Liu, Haibo Hu, Zhengtong Liu, Shumin Xiao, Junfeng Wang, Yu Zhou, and Qinghai Song
  • Photonics Research
  • Vol. 12, Issue 8, 1696 (2024)
Kewei Bian, Zhenyu Li, Yushuai Liu, Sumei Xu, Xingyan Zhao, Yang Qiu, Yuan Dong, Qize Zhong, Tao Wu, Shaonan Zheng, and Ting Hu
  • Photonics Research
  • Vol. 12, Issue 6, 1138 (2024)
Liming Yang, Ruihai Wang, Qianhao Zhao, Pengming Song, Shaowei Jiang, Tianbo Wang, Xiaopeng Shao, Chengfei Guo, Rishikesh Pandey, and Guoan Zheng
  • Photonics Research
  • Vol. 11, Issue 12, 2242 (2023)
Yue Wang, Dashan Dong, Wenkai Yang, Renxi He, Ming Lei, and Kebin Shi
  • Photonics Research
  • Vol. 12, Issue 2, 271 (2024)
Weike Zhao, Yingying Peng, Mingyu Zhu, Ruoran Liu, Xiaolong Hu, Yaocheng Shi, and Daoxin Dai
  • Photonics Research
  • Vol. 12, Issue 2, 183 (2024)