Article
Optics
Renyan Wang, Liang Jin, Jiazhu Wang, Shangzhi Xie, Xiaohui Li, Yingtian Xu, He Zhang, Xin Zhao, Xiaohui Ma
Summary: A novel harmonic mode-locked fiber laser based on nonlinear multimode interference in a microfiber-assisted ultrafast optical switch is proposed in this letter. Experimental results demonstrate that stable high-repetition-rate laser output can be achieved through specific design.
CHINESE OPTICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Shan Wang, Zhiguo Lv, Jintao Qiu
Summary: By introducing grating pairs for dispersion management, different dispersion regimes can be achieved, ranging from soliton state in the anomalous dispersion regime to dissipative soliton state in the normal dispersion regime. Tunable spectrum distribution can be realized by adjusting two intra-cavity polarization controllers. This dispersion management method complements NL-MMI mode-locking techniques and enables stable self-start mode locking, making it useful for practical applications.
Article
Multidisciplinary Sciences
Chun-Wei Chen, Kabish Wisal, Yaniv Eliezer, A. Douglas Stone, Hui Cao
Summary: High-power fiber laser amplifiers have become widely used in industry, science, and defense. However, the power scaling of these amplifiers is limited by transverse mode instability. We propose a theoretical method using a highly multimode fiber amplifier to efficiently suppress thermal and optical instability. By exciting multiple modes, the threshold power for transverse mode instability increases linearly. Additionally, when the frequency bandwidth of the seed laser is narrower than the spectral correlation width of the multimode fiber, the amplified light maintains high spatial coherence and can be transformed to any target pattern or focused to a diffraction-limited spot.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Instruments & Instrumentation
Yaoyao Qi, Mengyuan Liu, Nannan Luan, Song Yang, Zhenxu Bai, Bingzheng Yan, Ding Jie, Yulei Wang, Zhiwei Lu
Summary: This paper reviews the research status on the mechanism and technology of all-fiber mode-locked ultrafast lasers with multimode fiber based saturable absorber. By using a novel all-fiber structured mode-locking modulation device, the single pulse energy and pulse width of conventional soliton can reach the order of nJ and fs in wavelengths of 1 μm, 1.5 μm, and 2 μm. It also enables switchable and tunable dual or multi-wavelength mode-locked operation. Additionally, fascinating nonlinear optical phenomena such as soliton molecules and noise-like pulses were achieved, which provides an excellent platform for studying nonlinear optics.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Optics
Xiaohui Li, Liang Jin, Renyan Wang, Shangzhi Xie, Xiaochen Zhang, He Zhang, Yingtian Xu, Xiaohui Ma
Summary: In this paper, a Gigahertz harmonic mode-locked fiber laser based on microfiber-assisted nonlinear multimode interference is proposed and demonstrated, achieving stable mode-locking at a repetition rate of 1.26 GHz. This provides new insights into implementing high repetition frequency mode-locking fiber lasers.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Xinghao Ren, Huanhuan Li, Ziyi Zhang, Junjie Zhang, Shiqing Xu
Summary: Stable bound soliton pairs with tunable central wavelength have been observed experimentally, providing insights into the nonlinear dynamics in fiber lasers and high-capacity fiber communication.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Jiaqiang Lin, Zhipeng Dong, Tianhao Dong, Xuexiao Ma, Chuansheng Dai, Peijun Yao, Chun Gu, Lixin Xu
Summary: In this study, an all-fiber bidirectional mode-locked laser based on nonlinear multimode interference is reported. It can generate asynchronous pulse trains in different directions and operate in different states. This work provides a new platform for studying the dynamic characteristics of bidirectional mode-locked lasers.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Jiaqiang Lin, Zhipeng Dong, Tianhao Dong, Yiming Zhang, Chuansheng Dai, Peijun Yao, Chun Gu, Lixin Xu
Summary: A switchable single wavelength and dual-wavelength all-fiber ultrafast mode-locked laser was reported based on the nonlinear multimode interference effect of graded-index multimode fiber. By adjusting intra-cavity loss and polarization controllers, traditional switchable single wavelength and dual-wavelength mode-locking can be realized, along with the observation of a single wavelength harmonic soliton molecule mode-locking. This laser could be useful in measuring chemical reactions and has rarely been reported in literature.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Wei Pan, Liang Jin, Jiazhu Wang, Renyan Wang, He Zhang, Xu Yingtian, Xin Zhao, Yang Li, Xiaohui Ma
Summary: The all-normal-dispersion dissipative soliton mode-locking based on nonlinear multimode interference (NMI) is achieved by offset-splicing three pieces of graded-index multimode fibers (GIMFs), acting as a saturable absorber. This method eliminates the need for adding a step multimode fiber in the resonant cavity and allows for dissipative soliton mode-locking in the ANDi regions with improved saturated absorption. It is of great interest in the field of ultrafast photonics.
Article
Optics
Zixuan Sang, Tianye Huang, Chaoyu Xu, Zhuo Chen, Jianxing Pan, Mingfeng Ge, Jie Yin, Chuyu Peng, Huang Yu, Kang Li, Shaoxiang Chen, Bao Huang, Huixuan Hu, Perry Ping Shum
Summary: In this study, a passively mode-locked fiber laser with switchable output states is demonstrated using an all-fiber saturable absorber. The vectorial characteristics of the output soliton are investigated, revealing the dominant role of nonlinear multimode interference in soliton generation. Additionally, various mode-locked states are achieved in the laser, providing a useful platform for studying ultrafast soliton dynamics.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
Wentan Fang, Xiaohui Ma, Yong Zhou, Wei Zhang, Xiaolin Chen, Song Huang, Meisong Liao, Yasutake Ohishiand, Weiqing Gao
Summary: We propose a Yb-doped fiber laser with an all-fiber beam shaper based on a single-mode-graded-index multimode-few-mode fiber (SMF-GIMF-FMF) structure. The excitation coefficients of the mode can be adjusted continuously by changing the GIMF length. Numerical simulations are performed to investigate the beam shaping dynamics in the fiber structure. Through adding the simple device geometry in the laser cavity, the switchable output between the fundamental transverse (LP01) mode and the second-order transverse (LP11) mode can be achieved. Cylindrical vector beams with high mode purity are also shown by removing the degeneracy of the LP11 mode.
Review
Engineering, Electrical & Electronic
Kun Wang, Xingchen Dong, Michael H. Kohler, Patrick Kienle, Qiang Bian, Martin Jakobi, Alexander W. Koch
Summary: Optical fiber sensors based on multimode interference have attracted increasing interest in recent years and have been developed into various sensors used in practical applications. The different probe structures and measurement methods have distinct sensing properties and sensitivities, showing promising potential for future development.
IEEE SENSORS JOURNAL
(2021)
Article
Optics
Jia-Wen Wu, Yu-Xin Gao, Xu-Bin Lin, Jin-Gan Long, Hu Cui, Zhi-Chao Luo, Wen-Cheng Xu, Ai-Ping Luo
Summary: The study presents the generation of Q-switched mode-locked pulses in an Yb-doped multimode fiber laser using a graphene-deposited multimode microfiber for the first time. The results show successful single-wavelength and dual-wavelength QML operations, indicating potential applications in optical sensing, measuring, and laser processing.
CHINESE OPTICS LETTERS
(2021)
Article
Optics
Chuansheng Dai, Zhipeng Dong, Jiaqiang Lin, Yimin Zhang, Peijun Yao, Lixin Xu, Chun Gu
Summary: In this study, we demonstrate an all-fiber spatiotemporal mode-locked laser based on graded-index multimode fiber, which is capable of delivering high single-pulse energy and improved beam quality. By amplifying the pulse and achieving self-cleaning effect, high power pulses with high beam quality can be obtained in the all-fiber system.
Article
Optics
S. Thulasi, S. Sivabalan
Summary: In this research, a novel femtosecond fiber laser system is demonstrated, which achieves high stability femtosecond laser output by using a nonlinear multimode interference based saturable absorber as the seed source.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Civil
Xiuyan Hu, Ruifu Zhang, Xiaosong Ren, Chao Pan, Xue Zhang, Haibo Li
Summary: This study introduces a conceptually optimized damping distribution pattern, where the nominal additional damping ratio provided by dampers at each story is positively correlated with the corresponding story drift. This pattern reduces the total required damping coefficient while maintaining the effectiveness of response mitigation.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Correction
Multidisciplinary Sciences
Oskar Arrizabalaga, Qi Sun, Martynas Beresna, Timothy Lee, Joseba Zubia, Javier Velasco Pascual, Idurre Saez de Ocariz, Axel Schulzgen, Jose Enrique Antonio-Lopez, Rodrigo Amezcua-Correa, Joel Villatoro, Gilberto Brambilla
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Electrical & Electronic
Xiaowen Hu, Jian Zhao, Jose E. Antonio-Lopez, Shengli Fan, Rodrigo Amezcua Correa, Axel Schulzgen
Summary: This study utilizes the stability of optical fiber output images for object recognition, achieving high classification accuracy even when the fiber is bent or positioned far away from the object.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Josu Amorebieta, Angel Ortega-Gomez, Ruben Fernandez, Enrique Antonio-Lopez, Axel Schulzgen, Joseba Zubia, Rodrigo Amezcua-Correa, Gaizka Durana, Joel Villatoro
Summary: This paper presents a temperature sensor based on multicore fiber that operates in a wide thermal range and is robustly packaged for harsh environments. The sensor shows higher sensitivity in reflection mode and is packaged with inner ceramic and outer metallic tubes for protection. The device can accurately measure temperature in demanding industrial applications and can be easily fabricated and interrogated.
OPTICS AND LASER TECHNOLOGY
(2022)
Editorial Material
Physics, Multidisciplinary
Dan T. Nguyen, Axel Schulzgen
FRONTIERS IN PHYSICS
(2022)
Article
Optics
Oskar Arrizabalaga, Qi Sun, Timothy Lee, Joseba Zubia, Javier Velasco Pascual, Idurre SAez De Ocariz, Axel SchUlzgen, Rodrigo Amezcua-Correa, Gilberto Brambilla, Martynas Beresna
Summary: An optical gauge based on coupled multi-core fiber is proposed and demonstrated. By breaking the symmetry of the fiber index profile, asymmetric mode coupling is introduced, allowing the fabrication of optical gauges with the capability to detect and differentiate different types of deformation in structures.
OPTICS AND LASERS IN ENGINEERING
(2022)
Editorial Material
Optics
Geoffrey A. Cranch, Michel Digonnet, Peter Dragic, Kara Peters, Axel Schulzgen, Anbo Wang, Lan Yang
Summary: This special issue includes a compilation of papers on optical fiber sensors, which were initially presented and published in a more concise form at the 27th International Conference on Optical Fiber Sensors (OFS) held in Alexandria, Virginia, United States, from August 29th to September 2nd, 2022. (c) 2023 Optica Publishing Group
Article
Engineering, Electrical & Electronic
Stefan Gausmann, Xiaowen Hu, Jian Zhao, Md. Selim Habib, He Cheng, J. E. Antonio-Lopez, Xiaoming Yu, Rodrigo Amezcua-Correa, Axel Schulzgen
Summary: In this paper, the chromatic dispersion properties of transverse Anderson localization optical fiber (TALOF) and their impact on broad band supercontinuum (SC) generation are discussed. The study reveals a clear correlation between the Anderson localization length and the dispersion properties. The authors demonstrate the tunability of the zero dispersion wavelength within the same fiber by selective excitation of specific modes, and generate multi-octave spanning SC, highlighting the potential of disordered Anderson localization fibers for nonlinear applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Xiaowen Hu, Jian Zhao, Jose Enrique Antonio-Lopez, Stefan Gausmann, Rodrigo Amezcua Correa, Axel Schulzgen
Summary: In this paper, an adaptive inverse mapping (AIP) method is proposed to achieve high-quality imaging through dynamic scattering media. The method does not require prior knowledge and only needs output speckle images after initialization. The inverse mapping can be corrected through unsupervised learning. The effectiveness of the method is demonstrated through numerical simulations and experiments, showing increased robustness in imaging. The high imaging performance of the AIP method demonstrates great potential in imaging through dynamic scattering media.
Article
Optics
Xiaowen Hu, Jian Zhao, Jose Enrique Antonio-Lopez, Rodrigo Amezcua Correa, Axel Schulzgen
Summary: The fusion of fiber-optic imaging with supervised deep learning has seen significant development in recent years, enabling high-quality imaging of difficult-to-reach areas. However, the requirement for paired collection of input objects and fiber outputs limits the potential of fiber-optic imaging. The use of unsupervised image reconstruction, based on transverse Anderson localization in disordered fibers, offers a new solution. In this study, unsupervised full-color imaging with cellular resolution was successfully demonstrated through a meter-long disordered fiber in both transmission and reflection modes. Two stages of unsupervised image reconstruction, involving pixel-wise standardization and fine detail recovery through a generative adversarial network, were employed. This approach allows for flexible calibration under various conditions without the need for paired images.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Xiaowen Hu, Stefan Gausmann, Md. Selim Habib, Md. Abu Sufian, Axel Schulzgen
Summary: This study proposes a novel design of an all-solid anti-resonant fiber (AS-ARF) that achieves normal dispersion at 2 μm wavelength for high-power fiber lasers. The AS-ARF design is optimized using a genetic algorithm to balance dispersion, mode field area, and confinement loss. The optimized AS-ARF demonstrates favorable properties such as normal dispersion over a wide spectrum, large mode field area, low losses, and tolerance to manufacturing errors.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
M. A. Cooper, J. Wahlen, S. Yerolatsitis, D. Cruz-Delgado, D. Parra, B. Tanner, P. Ahmadi, O. Jones, Md. S. Habib, I. Divliansky, J. E. Antonio-Lopez, A. Schulzgen, R. Amezcua Correa
Summary: Antiresonant hollow-core fibers (AR-HCFs) have shown great potential for high-energy and high-power laser delivery, with the ability to transmit single-mode lasers at multi-kW power levels and narrow linewidths.
Article
Multidisciplinary Sciences
Ning Wang, He Wen, Juan Carlos Alvarado Zacarias, Jose Enrique Antonio-Lopez, Yuanhang Zhang, Daniel Cruz Delgado, Pierre Sillard, Axel Schulzgen, Bahaa E. A. Saleh, Rodrigo Amezcua-Correa, Guifang Li
Summary: Laser, as one of the greatest inventions in history, has been widely applied and had a profound impact on society. However, previous lasers can only operate in one physical domain. In this study, we have experimentally demonstrated the simultaneous lasing of photons and phonons in a two-mode silica fiber ring cavity. This multidomain laser has the potential to be applied in various fields such as optomechanical sensing, microwave generation, and quantum information processing.
Article
Optics
Amy Van Newkirk, J. Enrique Antonio-Lopez, Rodrigo Amezcua Correa, Axel Schulzgen
Summary: An anti-resonant hollow core fiber was developed for 3-5 μm transmission, exhibiting low transmission loss in the MWIR region. With strong core confinement, the fiber demonstrated a loss of only 0.128 dB/m at 4.05 μm and 0.316 dB/m at 4.63 μm. This expands the usable transmission windows and potential applications for silica-based ARHCF.
Proceedings Paper
Optics
Matthew A. Cooper, Stefan Gausmann, Jose E. Antonio-Lopez, Axel Schuelzgen, Rodrigo Amezcua Correa
Summary: The SBS properties of LMA fibers with confined Ytterbium doping are investigated, and the amplifier performance is numerically compared with homogeneously doped large mode area gain fibers and the corresponding high-power single frequency SBS thresholds.
FIBER LASERS XIX: TECHNOLOGY AND SYSTEMS
(2022)
