Article
Engineering, Electrical & Electronic
Jingcheng Shang, Shengzhi Zhao, Yizhou Liu, Yuefeng Zhao, Yuzhi Song, Tao Li, Tianli Feng
Summary: We propose a design roadmap for a high repetition rate Tm-doped ultrafast fiber laser, which has been confirmed by theoretical simulation and experimental verification. The laser operates in both continuous wave and mode-locking modes, with a wide tunable wavelength range and high average power.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Getinet Woyessa, Kyei Kwarkye, Manoj K. Dasa, Christian R. Petersen, Raghuraman Sidharthan, Shaoxiang Chen, Seongwoo Yoo, Ole Bang
Summary: The study presents a simple and power-stable 1.5-10.5 μm fiber laser with no thulium amplifier needed, achieving an average output power of 86.6 mW. The stability measurements showed minimal fluctuations in average power and power spectral density stability, making it ideal for applications in spectroscopy and imaging.
Article
Engineering, Electrical & Electronic
Antonella Maria Loconsole, Mario Christian Falconi, Andrea Annunziato, Solenn Cozic, Samuel Poulain, Francesco Prudenzano
Summary: In this work, a novel mid-infrared continuous wave laser is designed using a fluoroindate fiber co-doped with holmium and neodymium, emitting at 3.92 μm wavelength when pumped at 808 nm. The laser is modeled as a nine-level system, considering experimental spectroscopical parameters. The designed laser shows higher slope efficiency and lower power threshold compared to a holmium-heavily-doped fiber pumped at 888 nm.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Shijie Fu, Xiushan Zhu, Jie Zong, Michael Li, Ivan Zavala, Valery Temyanko, Arturo Chavez-Pirson, Robert A. Norwood, Nasser Peyghambarian
Summary: In this experiment, a single-frequency distributed Bragg reflector fiber laser at 915 nm was achieved using a 2.5-cm Nd3+-doped phosphate fiber, resulting in an output power of 13.5 mW at an absorbed pump power of 240 mW. The experimental results indicate that Nd3+-doped phosphate glass fiber is more efficient than Nd3+-doped silica glass fiber for single-frequency laser operation in the 900 nm wavelength range.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Jiuru He, Rui Song, Li Jiang, Jing Hou
Summary: An all-fiber supercontinuum laser source with high output power and broad spectrum was demonstrated in this study. By carefully studying the effect of fiber length, the spectral characteristics and output power of the supercontinuum were optimized. This ultra-compact generation method offers a reliable and easily accessible solution for practical applications.
IEEE PHOTONICS JOURNAL
(2022)
Article
Optics
Peter Fjodorow, Mikhail P. Frolov, Stanislav O. Leonov, B. Denker, B. Galagan, S. E. Sverchkov, V. V. Koltashev, V. G. Plotnichenko, M. Sukhanov, A. P. Velmuzhov
Summary: An extensive study of a novel room-temperature mid-infrared Ce3+-doped Ge20Sb10Ga5Se65 glass laser was reported. The study investigated the influence of output-coupler transmission on laser efficiency and emission spectra. The laser was pumped by a pulsed Fe:ZnSe laser at 4.1 mu m, demonstrating a maximum output energy and a tuning range for the first time.
Article
Optics
Zhiyuan Han, Dunlu Sun, Huili Zhang, Jianqiao Luo, Cong Quan, Yuwei Chen, Yang Qiao, Zhentao Wang, Maojie Cheng
Summary: We demonstrate the influence of gamma-ray irradiation on the propagation loss and laser performance of an Er, Pr:GYSGG single crystal fiber (SCF). The Er, Pr: GYSGG SCF laser can be used as a potential seed source for mid-infrared (MIR) multi-stage amplification laser apparatus applied in radiation environment.
JOURNAL OF LUMINESCENCE
(2023)
Article
Computer Science, Information Systems
Seyed Morteza Hosseini, Mohammad Hossein Maghami, Parviz Amiri, Mohamad Sawan
Summary: This paper introduces a low-power, single-stage, active rectifier based on a new charge-pump circuit for use in biomedical implants. The circuit rectifies AC input voltage to DC and amplifies the DC output voltage. Low-loss MOS switches are used for high power conversion efficiency, and two comparators eliminate reverse leakage current for improved power efficiency. The rectifier, implemented in a 0.18 μm standard CMOS technology, achieves 1.205 V output DC voltage from an AC input signal with a 3 kΩ load resistance at 13.56 MHz operating frequency.
Article
Engineering, Electrical & Electronic
Xing Luo, Yating Tang, Fanlong Dong, Jiachen Wang, Linpeng Yu, Peiguang Yan, Jinzhang Wang, Zhijian Zheng, Qitao Lue, Chunyu Guo, Shuangchen Ruan
Summary: This study demonstrates the generation of broadband mid-infrared supercontinuum at room temperature using an ultralow repetition rate noise-like pulse mode-locked fiber laser. By inserting a standard single mode fiber and a dispersion compensation fiber into the long laser cavity of a Tm-doped fiber laser, mode-locked noise-like pulses with a repetition rate of approximately 190 kHz are obtained. The amplified noise-like pulse is then used to pump a highly nonlinear indium fluoride fiber, resulting in a flat mid-infrared supercontinuum with a coverage range from approximately 1500 nm to 4100 nm. The all-fiber mid-infrared supercontinuum laser source has a simple architecture and low cost. The study highlights the advantages of ultra-low repetition rate noise-like pulses in mid-infrared supercontinuum generation.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Ya Grudtsyn, I. O. Kinyaevskiy, A. Koribut, L. Seleznev, Yu A. Gerasimova, A. A. Rogashevskii, A. A. Ionin
Summary: This study demonstrates broadband frequency downconversion of a 90 fs 744 nm Ti:sapphire laser pulse into mid-infrared light using filamentation-induced self-frequency shift in air and intra-pulse difference frequency generation in a LiGaS2 crystal. The converted mid-IR pulse has a transform-limited duration of 47 fs, corresponding to a 1.3-cycle laser pulse, with energy conversion efficiency up to 10(-4) without chirp compensation. These results provide insights into efficient generation of mid-IR pulses from Ti:sapphire laser pulses.
Article
Optics
Whitney Harmon, Kevin Robben, Christopher M. Cheatum
Summary: We present a method to increase the power of mid infrared laser pulses by utilizing an additional stage of parametric amplification with a second AgGaS2 crystal. This method improves photon conversion efficiency without requiring extra pump power and utilizes discarded near-infrared light for pumping the additional stage.
Article
Optics
Jacek Swiderski, Pawel Grzes
Summary: High-power supercontinuum generation was demonstrated in step-index fluoroindate (InF3) and chalcogenide (As2S3) fibers, with output average power of 2.95 W in InF3 fiber and 440 mW in As2S3 fiber extending up to 4.17 μm. By cascading the system, the spectrum was extended up to 5.58 μm. The flat spectrum and high-output power indicate the potential of these sources for various applications.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Bing Han, Han Wu, Yang Liu, Shisheng Dong, Yunjiang Rao, Zinan Wang, Jiangming Xu, Lingmei Ma
Summary: Random fiber laser (RFL) utilizing stimulated Raman scattering and distributed random Rayleigh backscattering in fiber as optical gain and feedback mechanisms has been rapidly developed. By using a high-order pump and new transmission fiber with lower transmission loss, Rayleigh backscattering coefficient, and Raman gain coefficient, the length limits of random fiber lasing and sensing can be broken. A 200 km ultralong single-ended RFL and sensor are experimentally demonstrated, which are the longest single-ended RFL and sensor with functional remote reflectors reported to date. The proposed combination of high-order random lasing and ULLF with EDF can extend the working distance of various fiber sensing systems for safety monitoring of ultralong infrastructures.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Lu Zhang, Shijie Fu, Jinhui Li, Quan Sheng, Junxiang Zhang, Wei Shi, Jianquan Yao
Summary: A novel dual-wavelength pumping scheme for cascaded mid-infrared Er-doped ZBLAN fiber laser is proposed and analyzed in this study, and its potential for generating efficient 2.78 μm and 3.44 μm laser simultaneously is demonstrated. By optimizing the pumping parameters, an overall optical efficiency of more than 55% can be achieved for the two laser outputs with respect to the pump power.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yangyang Liang, Yizhou Liu, Kejian Yang, Tao Li
Summary: This study investigated the saturable absorption property of carbon nanohorn and generated pulsed lasers in the mid-infrared region for the first time. It was found that carbon nanohorn exhibits comparable nonlinear optical performance to carbon nanotubes in the mid-infrared region, suggesting potential for further research on mid-infrared mode-locking lasers by reducing the thickness of the carbon nanohorn.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Chemistry, Physical
Lukas Whaley-Mayda, Samuel B. Penwell, Andrei Tokmakoff
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2019)
Article
Chemistry, Multidisciplinary
Lukas Whaley-Mayda, Abhirup Guha, Samuel B. Penwell, Andrei Tokmakoff
Summary: The combination of infrared-vibrational absorption and fluorescent electronic transition techniques in FEIR spectroscopy enables single-molecule sensitivity in solution, allowing for measurement of vibrational spectra and relaxation processes. Introduction of FEIR correlation spectroscopy demonstrates the potential for single-molecule sensitivity in vibrational investigations in solution or condensed phase.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Lukas Whaley-Mayda, Abhirup Guha, Andrei Tokmakoff
Summary: Fluorescence-encoded infrared (FEIR) spectroscopy is a technique that can achieve single-molecule sensitivity in solution. This study investigates the experimental factors for successful FEIR measurements and introduces a brightness metric to analyze variations in signal strength and signal to background. The resonance condition is found to affect FEIR brightness, and strategies for optimizing detection quality and sensitivity are discussed.
JOURNAL OF CHEMICAL PHYSICS
(2022)
