Article
Optics
Dante Roa, Jeffrey Kuo, Harry Moyses, Peter Taborek, Toshiki Tajima, Gerard Mourou, Fuyuhiko Tamanoi
Summary: Ultra-compact electron beam technology based on laser wakefield acceleration has the potential to greatly impact radiotherapy treatments, allowing for cancer treatments with electron beams from a miniature electronic source. This technology could also lead to the development of endoscopy-based radiotherapy and high-dose-rate brachytherapy systems. The use of low-energy LWFA electron beams could benefit various types of tumors and significantly reduce operating costs in radiation oncology clinics.
Article
Optics
Jinhwa Gene, Dong-Il Yeom, Seung Kwan Kim, Sun Do Lim
Summary: The study introduces a high-energy, low-frequency 2-micron femtosecond fiber laser designed for laser surgery and vehicle laser detection and ranging applications. The laser, incorporating thulium-doped fiber gains and hybrid mode-locking techniques, achieved the highest pulse energy and lowest pulse rate reported to date, with pulse duration and output optical spectrum characteristics also evaluated for stability over extended periods.
OPTICS AND LASER TECHNOLOGY
(2021)
Review
Engineering, Electrical & Electronic
Fufei Pang, Lina Xiang, Huanhuan Liu, Liang Zhang, Jianxiang Wen, Xianglong Zeng, Tingyun Wang
Summary: Vortex beams with phase or polarization singularity in their center part have unique features and applications in fields such as optical communication and optical tweezer. Compared to traditional Gaussian beams, vortex beams offer more freedom in optical sensing by controlling spin, orbital phase, and polarization. This review discusses the theory of polarization and phase vortices, as well as the generation of vortex beams in optical fiber and their sensing applications, aiming to inspire further research and development in fiber vortex for sensing applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Review
Chemistry, Analytical
Alberto Rovera, Alexandru Tancau, Nadia Boetti, Matteo D. L. Dalla Vedova, Paolo Maggiore, Davide Janner
Summary: This article mainly introduces the application of fiber optic sensors in the aerospace field. Fiber optic sensors, with advantages such as small size and electromagnetic immunity, play a significant role in the control systems of automated, smart, and crewless vehicles as well as reusable spacecraft. However, the radiation and harsh conditions in the aerospace environment pose challenges for potential users and fiber optic sensor specialists. This review discusses the main requirements of the aerospace industry for fiber optic sensors and provides an overview of fiber optics and sensors based on them. Finally, various examples of applications in radiation environments for aerospace are presented.
Article
Spectroscopy
Hugh J. Byrne, Isha Behl, Genecy Calado, Ola Ibrahim, Mary Toner, Sheila Galvin, Claire M. Healy, Stephen Flint, Fiona M. Lyng
Summary: Vibrational spectroscopy, whether based on infrared absorption or Raman scattering, has increasingly attracted attention for biomedical applications. Proof of concept explorations have shown potential for diagnosis of oral potentially malignant disorders and cancer. Raman microspectroscopy is being widely applied for analysis of histological, cytological, and saliva samples, with future prospects for routine in vivo screening.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Physics, Applied
Hu Ge, Jin Hu, Rui Wang, Gang Zhao, Weiguang Ma, Weigen Chen, Fu Wan
Summary: This paper presents a robust approach for phase-locking, which utilizes the shape and intensity of cavity transmission profiles to identify phase deviations. The outstanding performance of this approach under severe airflow shocks demonstrates its feasibility for real-time gas detection in harsh environments.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Yizhu Chen, Tianfu Yao, Hu Xiao, Jinyong Leng, Pu Zhou
Summary: Raman fiber lasers are versatile light sources for various applications, with high power and brightness-enhanced RFLs attracting significant interest. However, stable Raman lasing at high power levels is challenged by thermal effects. By introducing an all-fiberized Raman fiber amplifier based on metal-coated passive fiber, researchers achieved high power lasing with effective thermal management, reaching the highest power record in the field of Raman lasers based purely on nonlinear gain.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Kejun Shang, Ming Lei, Haowei Li, Tianqi Zhang, Xiaozhi Yu, Qiang Xiang, Yonglin Na, Lizhe Zhang
Summary: This study presents a novel interferometric fiber optic gyroscope (IFOG) utilizing an integrated optical chip, application-specific integrated circuit, and small-diameter sensing coil. The prototype has an overall size of 30 mm x 30 mm x 30 mm and weighs 68 g, making it the smallest closed-loop IFOG currently known. Static experiments demonstrate that the bias stability of the integrated IFOG closely matches the theoretical accuracy limit determined by the fiber coil, meeting the requirements of near-navigation-grade compact inertial navigation systems.
CHINESE OPTICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
V. Balaswamy, V. R. Supradeepa
Summary: This study demonstrates the versatility of a recently developed technique called Stimulated Raman Scattering, which allows for simultaneous wavelength conversion and power combining of multiple Ytterbium-doped fiber lasers. Experimental results show that the technique works effectively with different wavelength spacing and can be applied to the combination of more than two lasers.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Optics
Qiujun Ruan, Xiaosheng Xiao, Jinhai Zou, Hang Wang, Shuzheng Fan, Tianran Li, Jin Li, Zhipeng Dong, Zhiping Cai, Zhengqian Luo
Summary: This paper reports a fiber laser capable of spatiotemporal mode-locking (STML) at visible wavelengths, demonstrating its stability and narrow pulse duration through theoretical prediction and experimental realization. The locking of transverse and longitudinal modes is also illustrated, and the power is further boosted by establishing an ultrafast fiber amplifier.
LASER & PHOTONICS REVIEWS
(2022)
Article
Engineering, Electrical & Electronic
Yuan He, Ning Li, Yi Feng, Xiaoyan Li, Dongyang Liu, Jing Huang, Ruiting Zhou, Man Wu, Lili Miao, Chujun Zhao
Summary: Highly stable two-dimensional (2D) hybrid organic-inorganic perovskite nanocrystals (PEA(2)PbI(4) NCs) were successfully prepared using liquid-phase exfoliation (LPE) method. The ultrafast nonlinear saturable absorption characteristics of these NCs were studied in the near-infrared to mid-infrared regime. Based on their unique nonlinear optical response, a high stable fiber laser with a pulse duration of approximately 531 fs and a signal-to-noise ratio of approximately 90 dB was achieved at 1.5 μm, and a robust nanosecond fiber laser with a pulse duration of approximately 553 ns and a signal-to-noise ratio of approximately 40 dB was obtained at 2.8 μm. These results demonstrate the potential of 2D perovskites as broadband pulse modulators for advanced optoelectronic applications.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
Dongyu Yan, Bowen Liu, Defeng Zou, Jie Guo, Yuxi Chu, Youjian Song, Minglie Hu
Summary: The study investigates the multi-pulsing mechanism in a dispersion-managed mode-locked Yb-doped fiber laser through numerical simulations and experiments, finding that the filtering effect of the chirped fiber Bragg grating plays a crucial role in the occurrence of multi-pulsing. The net cavity dispersion, when approaching zero, leads to an increase in spectral width, affecting the multi-pulsing threshold.
HIGH POWER LASER SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Analytical
Jost Stergar, Rok Hren, Matija Milanic
Summary: Hyperspectral microscope imaging (HMI) is a promising modality in histopathology that combines spatial information from standard microscopy and spectral-based contrast from hyperspectral imaging. This report describes the design, calibration, characterization, and validation of a custom-made laboratory HMI system, which shows comparable performance to classic spectrometry laboratory systems. The system is also validated against a laboratory hyperspectral imaging system for macroscopic samples, allowing for future comparison of spectral imaging results across different length scales.
Article
Materials Science, Multidisciplinary
Zhitong Chen, Guojun Chen, Richard Obenchain, Rui Zhang, Fan Bai, Tianxu Fang, Hanwen Wang, Yingjie Lu, Richard E. Wirz, Zhen Gu
Summary: This article introduces the delivery methods of cold atmospheric plasma (CAP) in biomedical applications, such as sterilization, wound healing, and cancer therapy. It also presents the future research needs in this field, providing insights for researchers from various disciplines.
Article
Engineering, Electrical & Electronic
Heming Wei, Zhe Gong, Wenjing Wu, Jiawei Che, Liang Zhang, Fufei Pang, Tingyun Wang
Summary: A broadband fiber-optic acoustic sensing system is proposed and demonstrated, which can detect acoustic waves with frequencies from tens of hertz to hundreds of kilohertz, showing great potential for acoustic emission detection in real applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Biochemical Research Methods
Zoya Volynskaya, Abigail S. Haka, Kate L. Bechtel, Maryann Fitzmaurice, Robert Shenk, Nancy Wang, Jon Nazemi, Ramachandra R. Dasari, Michael S. Feld
JOURNAL OF BIOMEDICAL OPTICS
(2008)
Article
Biochemical Research Methods
Obrad R. Scepanovic, Maryann Fitzmaurice, Arnold Miller, Chae-Ryon Kong, Zoya Volynskaya, Ramachandra R. Dasari, John R. Kramer, Michael S. Feld
JOURNAL OF BIOMEDICAL OPTICS
(2011)
Article
Multidisciplinary Sciences
Jaqueline S. Soares, Ishan Barman, Narahara Chari Dingari, Zoya Volynskaya, Wendy Liu, Nina Klein, Donna Plecha, Ramachandra R. Dasari, Maryann Fitzmaurice
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2013)
Article
Instruments & Instrumentation
Obrad R. Scepanovic, Zoya Volynskaya, Chae-Ryon Kong, Luis H. Galindo, Ramachandra R. Dasari, Michael S. Feld
REVIEW OF SCIENTIFIC INSTRUMENTS
(2009)
Review
Pathology
Zoya Volynskaya, Andrew J. Evans, Sylvia L. Asa
ADVANCES IN ANATOMIC PATHOLOGY
(2017)
Article
Biochemical Research Methods
A. Saha, I. Barman, N. C. Dingari, S. McGee, Z. Volynskaya, L. H. Galindo, W. Liu, D. Plecha, N. Klein, R. R. Dasari, M. Fitzmaurice
BIOMEDICAL OPTICS EXPRESS
(2011)
Article
Oncology
AS Haka, Z Volynskaya, JA Gardecki, J Nazemi, J Lyons, D Hicks, M Fitzmaurice, RR Dasari, JP Crowe, MS Feld