Article
Optics
Xueyao Liu, Yanfeng Yu, Nannan Xu, Xinxin Shang, Pu Huang, Daizhou Zhang, Jianwei Jiang, Xing Wang, Hua Lu, Huanian Zhang, Dengwang Li
Summary: This study reports the preparation and characterization of CGT nanosheets using the liquid-phase exfoliation method. The application of CGT nanosheets in fiber lasers allows for passive Q-switching and modelocking operations. The results show that CGT nanosheets have the potential to be used in future high-performance photonic devices.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Multidisciplinary
Lina Zhao, Ye Yuan, Luyang Tong, Wenyu Zhang, Zhongshuai Zhang, Tingyin Ning, Yangjian Cai, Yuanmei Gao
Summary: A stable, passively Q-switched Yb:CaGdAlO4 laser based on Mo:BiVO4 saturable absorber was demonstrated in this research. The experimental results showed that Mo:BiVO4-SA is a great candidate for passively Q-switched lasers in the near infrared region. The structure and morphology of the nanoparticles were closely observed using transmission electron microscope, Raman spectrum and linear absorption.
Article
Instruments & Instrumentation
Lin Zhao, Nannan Xu, Rui Zhao, Xinxin Shang, Xueyao Liu, Daizhou Zhang, Huanian Zhang, Dengwang Li
Summary: Zirconium Diselenide (ZrSe2) was manufactured as the saturable absorber in the Er-doped fiber laser to demonstrate single- and dual-wavelength pulses, showing its potential for use in ultra-fast pulse lasers. The characteristics of ZrSe2 nanosheets make them a promising material for saturable absorbers in laser technology.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Optics
Ning Li, Jing Huang, Lin Du, Lingling Yang, Jie Li, Dongyang Liu, Lili Miao, Chujun Zhao
Summary: We demonstrate the highly stable soliton generation from a fiber laser mode-locked by the VSe2 nanosheets experimentally. The VSe2 nanosheets prepared via the liquid phase exfoliation method exhibit ultrafast relaxation time and excellent nonlinear optical behavior. They can act as a saturable absorber to achieve stable mode-locked laser output. The experimental observation also reveals the transition from conventional soliton to bound-state soliton.
Article
Optics
Anatolii Fedoseev, Serafima A. Filatova, Vladimir A. Kamynin, Mariya S. Kopyeva, Oleg E. Nanii, Alexander P. Smirnov, Vladimir B. Tsvetkov
Summary: The study presents numerical simulation and experimental results on generation dynamics of an all-fiber holmium laser with an intracavity modulator based on a Mach-Zehnder interferometer. The experimental data were compared with numerical simulation results in a wide range of parameters, allowing for correct numerical optimization. The peak powers obtained during experiments were consistent with numerical simulation results.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Optics
Hou Shaodong, Lu Chengjin, Lin Haifeng, Wang Jinzhang, Guo Chunyu, Cheng Jianqun, Zhang Min, Yan Peiguang
Summary: This study presents the nonlinear absorption of three Sb-related materials in the 2 μm waveband, showing their potential for use in photonic devices requiring ultrafast optical switching and modulation. The materials exhibited stable pulse durations, output powers, and signal-to-noise ratios, indicating their suitability for applications in Tm-doped fiber lasers.
Article
Optics
Alexander Dohms, Steffen Breuer, Christoph Skrobol, Robert Kohlhaas, Lars Liebermeister, Martin Schell, Bjoern Globisch
Summary: Semiconductor saturable absorber mirrors (SESAMs) are critical devices for passive mode locking in various lasers, operating at wavelengths ranging from 800 nm to 2400 nm. However, for the 1560 nm wavelength, the fabrication of SESAMs using the standard AlAs/GaAs material system requires highly strained InGaAs absorber layers, which reduce device efficiency and compromise long-term performance. In this study, we present lattice-matched SESAMs grown on InP, offering the potential for fewer structural defects and a longer operational lifetime. These SESAMs demonstrate ultrafast response, low non-saturable losses, and high effective modulation depth.
Article
Instruments & Instrumentation
Lu Li, Lihui Pang, Chao Guo, Xinyi Zhou
Summary: This study presents the synthesis and application of MnFe2O4 nanoparticles as a saturable absorber in designing Q-switching laser pulses. The experimental results demonstrate the potential of MnFe2O4 nanoparticles as an efficient SA material and their possible applications in photonics. Compared to recent reported Q-switching EDF lasers with LD materials, this work shows some improvements in pulse duration, repetition rate, and output power.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Lina Zhao, Wenyu Zhang, Ye Yuan, Luyang Tong, Jingjing Liu, Jie Liu, Yangjian Cai, Yuanmei Gao
Summary: Mo:BiVO4 nanoparticles were successfully used as an optical modulator in a Q-switched all-solid-state Tm:YAP laser for the first time, showing good nonlinear optical parameters in the 2-μm region.
Article
Optics
Zengrun Wen, Kaile Wang, Shuangcheng Chen, Haowei Chen, Xinyuan Qi, Baole Lu, Jintao Bai
Summary: In this study, a narrow spectral bandwidth EDF Q-switched laser is proposed, integrating saturable absorption and spectral filtering effects using SDIG. The spectral width of the Q-switched emissions is determined by the length of SDIG and pump power. The method provides a simple way to obtain Q-switched pulses with narrow bandwidths for various applications.
OPTICS AND LASER TECHNOLOGY
(2021)
Review
Optics
K. Y. Lau, D. Hou
Summary: This paper comprehensively reviews the use of material-based saturable absorbers in mode-locked fiber lasers, discussing advantages and challenges in areas such as material synthesis techniques, characteristics, composite materials, structure design, and deposition techniques. Concrete recommendations are provided to address current issues and challenges, aiming to contribute to further development in this field.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Lin-Guang Guo, Yong Yao, Jia-Nan Duan, Xiao-Chuan Xu, Ke Xu, Jia-Jun Tian, Yan-Fu Yang, Yun-Xu Sun
Summary: GBT nanoflakes with a thickness of about 3 nm were fabricated using liquid-phase exfoliation. The GBT-SA exhibited excellent nonlinear optical effects and showed great potential in applications such as fiber communication and ultrafast lasers.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Bo Guo, Xinyu Guo, Renlai Zhou, Zhongyao Ren, Qiumei Chen, Ruochen Xu, Wenbin Luo
Summary: By transferring MoTe2 nanosheets to the fiber taper using optical deposition, and inserting the MoTe2 saturable absorber into a ring cavity laser, stable two-pulse, three-pulse, and four-pulse bound solitons were successfully generated by adjusting the pump strength and polarization state, providing new ideas for the study of all-optical communication and soliton lasers.
Article
Materials Science, Multidisciplinary
Tenghui Chen, Zhongjun Li, Chunxiang Zhang, Zhenhong Wang, Mulin Luo, Yuan Zhang, Yachao Wang, Quanlan Xiao, Han Zhang, Jun Liu
Summary: The study successfully demonstrated a stable Q-switched mid-IR fiber laser using indium selenide (InSe) as the passive saturable absorber, achieving stable Q-switching pulses from the lasing pump threshold to a maximum pump power of 8.69 W.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Chi-Cheng Yang, Chih-Hsien Cheng, Ting-Hui Chen, Yung-Hsiang Lin, Jr-Hau He, Din-Ping Tsai, Gong-Ru Lin
Summary: Amorphous-Ge (a-Ge) or free-standing nanoparticles (NPs) synthesized via hydrogen-free plasma-enhanced chemical vapor deposition (PECVD) can be used as transmissive or reflective saturable absorbers to start up passively mode-locked erbium-doped fiber lasers (EDFLs). The a-Ge film can serve as a saturable absorber for self-starting EDFL pulsation, while the Ge-NP-on-Au (Ge-NP/Au) films can act as a reflective-type saturable absorber for broadened pulsewidth under high-gain operation. Both the a-Ge film and free-standing Ge NP exhibit potential as transmissive and reflective saturable absorbers, respectively, for ultrafast fiber lasers.
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)