Article
Optics
Martin Fibrich, Jan Sulc, Richard Svejkar, Helena Jelinkova
Summary: This study has successfully demonstrated the first continuous-wave quasi three-level laser emitting in the cyan-blue spectral range in praseodymium-doped oxide materials, achieving a high output power and efficiency.
APPLIED PHYSICS B-LASERS AND OPTICS
(2021)
Article
Optics
Shuyi Mi, Junhui Li, Disheng Wei, Ke Yang, Chao Yang, Baoquan Yao, Xiaoming Duan, Tongyu Dai
Summary: A high power, good beam quality continuous wave Tm:YAP slab laser was demonstrated operating at room temperature. A theoretical model was proposed to predict the laser's performance, with experimental results consistent with the theoretical simulations.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Samuel Paul David, Venkatesan Jambunathan, Fangxin Yue, Antonio Lucianetti, Tomas Mocek
Summary: This study presents the performance of diode-pumped Yb:LuAG lasers in cryogenic conditions in both continuous wave and pulsed modes, with a focus on the optimal crystal temperature of 140K. The use of Cr:YAG saturable absorbers for passive Q-switching resulted in significant improvements in pulse energy and peak power.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
L. B. Zhou, J. Y. Zou, W. X. Zheng, T. Zhang, B. Xu, X. D. Xu, A. A. Lyapin, J. Xu
Summary: The study presents the recent progress on continuous-wave and passively Q-switched Pr,Mg:SrAl12O19 bulk lasers using a 24-W diode laser as the pump source, demonstrating their potential for visible laser generation.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Yiping Zhou, Xudong Li, Chaojie Wei, Xiaojie Chen, Haobo Xu, Rongwei Fan, Deying Chen, Yugang Jiang, Renpeng Yan
Summary: A 5 kHz sub-nanosecond master oscillator power amplifier (MOPA) laser system with high pulse energy and peak power was reported in this paper.
Article
Materials Science, Multidisciplinary
Teng Zhang, Lunbin Zhou, Wanxin Zheng, Bin Xu, Yan Wang, Chaoyang Tu
Summary: The laser performance of diode-pumped continuous-wave Nd:CaLaGa3O7 laser was reported for the first time after registering the polarized absorption and emission spectra. A maximum output power of 1.45 W was achieved with a slope efficiency of about 27.7%, and wavelength tuning was realized. The broadband Nd3+-doped crystal shows promise for ultrashort pulse laser generation using mode locking technology.
Article
Instruments & Instrumentation
Jun-Jie Sun, Yi Chen, Kuo Zhang, Qi-Kun Pan, Yang He, De-Yang Yu, Fei Chen
Summary: This paper demonstrated a resonantly-pumped Tm:Lu2O3 laser operating in both continuous wave and acousto-optically Q-switched modes. The laser achieved different output powers and performance parameters in different operation modes.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Optics
Wanxin Zheng, Jingyu Zou, Dong Wang, Bin Xu, Andrey Lyapin, Polina Ryabochkina, Xudong Cui, Vadim Semashko, Stella Korableva
Summary: This work reports the recent progress of diode-pumped continuous-wave Pr:LiY0.3Lu0.7F4 lasers in the visible spectral region. By partially substituting Y3+ ions, orange and deep red lasers have been achieved in the Pr:LiY0.3Lu0.7F4 mixed crystal, which represents the best laser performance for Pr3+ mixed crystals.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Junxia Zhou, Ting Huang, Zhiwei Fang, Rongbo Wu, Yuan Zhou, Jian Liu, Haisu Zhang, Zhenhua Wang, Min Wang, Ya Cheng
Summary: We demonstrate a compact hybrid lithium niobate microring laser by butt coupling a commercial 980-nm pump laser diode chip with a high-quality Er3+-doped lithium niobate microring chip. Single-mode lasing emission at 1531-nm wavelength from the Er3+-doped lithium niobate microring can be observed with the integrated 980-nm laser pumping. The compact hybrid lithium niobate microring laser features small size and small linewidth, and has potential applications in coherent optical communication and precision metrology.
Article
Optics
Huiqi Li, Zhaocong Wang, Lei Wang, Yang Tan, Feng Chen
Summary: We successfully achieved milliwatt laser emissions at a wavelength of 1.06 & mu;m from a 30 & mu;m solid-state whispering-gallery-mode laser by constructing it using Nd:YAG thin films obtained through carbon-implantation enhanced etching of a Nd:YAG crystal. This microcavity laser demonstrates a maximum output power of 1.12 mW and an optical conversion efficiency of 12.4%, and can be efficiently integrated with a waveguide to achieve single-wavelength laser emission.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
Alexander A. Lagatsky, Gerald M. Bonner, Peter J. Schlosser, David J. M. Stothard, Loyd J. McKnight
Summary: This Letter reports on the development of an ultra-compact single-frequency Ti:sapphire laser under direct diode pumping. Single-longitudinal-mode operation is achieved using a miniature plane-parallel resonator and a volume Bragg grating as the output coupler. InGaN laser diodes operating at around 470nm and 490nm with a combined power of 6.7 W are used as the optical pump. Single-frequency operation at 813.4 nm generates a maximum output power of 700mW. A laser linewidth of 2.4MHz is measured during free-running operation and reduced to about 180 kHz when locked to an external reference cavity.
Article
Optics
A. K. Varshney, Mainuddin Mainuddin, Sanjeev Kumar, V. K. Singh, Veerendra Kumar, Avinash C. Verma, Ashwani Kumar, Gaurav Singhal
Summary: In this paper, a laser diode array pumped transversely circulating inorganic lasing liquid based laser is demonstrated. The lasing liquid, consisting of 0.3 mol/l trivalent neodymium (Nd3+) ions, is synthesized using a mixture of phosphorous oxychloride (POCl3) and tin tetrachloride (SnCl4). The laser cell is side-pumped in close-coupling configuration by vertically arranged laser diode bars in an array. The lasing liquid is circulated transversely through the laser cell at flow rates of 10-12 l/min under laminar flow regime to replenish the heated lasing liquid. The results show the power scalability of liquid laser with increased optical-optical efficiency.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Issa Tamer, Brendan A. Reagan, Thomas Galvin, Justin Galbraith, Emily Sistrunk, Andrew Church, Glenn Huete, Hansel Neurath, Thomas Spinka
Summary: This study demonstrates the high pulse energy generation capability of a diode-pumped Tm:YLF laser at 1.88 μm wavelength, opening new research paths for mid-infrared solid-state lasers.
Article
Physics, Multidisciplinary
Zexin Song, Qi Bian, Yu Shen, Keling Gong, Nan Zong, Qingshuang Zong, Yong Bo, Qinjun Peng
Summary: The influence of pumping laser pulse on the property of quasi-continuous-wave diode-side-pumped Nd:YAG laser was investigated, and it was found that increasing the pump pulse duration significantly enhances the laser output power.
Article
Optics
Wensheng Zhang, Qiong Gao, Sheng Zhou, Linjun Li, Xinzhi Ma
Summary: This paper demonstrates a diode-pumped acousto-optical Q-switched Ho:GTO laser with achieved maximum output power and pulse energy at different repetition rates, and calculated the corresponding peak power. Additionally, the authors estimated the beam quality factors of the laser.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Yousra Bouasria, Debanuj Chatterjee, Fabienne Goldfarb, Yassine Hassouni, Fabien Bretenaker
Summary: Phase sensitive amplifiers have the potential to achieve noiseless amplification with a quantum-limited noise figure of 0 db, but undesired FWM processes in a non-linear fiber can introduce extra waves and potentially degrade the NF. A general analytical quantum derivation of the PSA NF is provided here for an arbitrary number of nonlinearly coupled modes, showing that the noise level depends on the number of interacting waves. Illustrative example with six waves demonstrates a 0.4 db degradation in signal NF compared to PIA operation with a 10 db noise figure.
Article
Optics
Debanuj Chatterjee, Yousra Bouasria, Fabienne Goldfarb, Fabien Bretenaker
Summary: An analytical model was developed to describe the propagation of seven continuous waves through a nonlinear fiber, focusing on the interactions between pump waves, signal waves, and high-order idler waves. The study found that introducing high-order idler waves can significantly enhance the maximum gain of the signal in certain amplifiers. Results from the analytical model were compared with a numerical seven-wave model, showing good agreement under weak system nonlinearity conditions.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Optics
Yifan Sun, Sylvain Combrie, Alfredo De Rossi, Fabien Bretenaker
Summary: The robustness of mode-locking in a harmonic cavity nanolaser sustaining oscillation of Hermite-Gaussian modes against potential distortion is theoretically analyzed. The influence of different laser parameters on the robustness of the mode-locked regime is discussed, considering imperfections of the harmonic potential.
Article
Optics
P. Neveu, J. Delpy, S. Liu, C. Banerjee, J. Lugani, F. Bretenaker, E. Brion, F. Goldfarb
Summary: A study demonstrated the generation of squeezed vacuum states of light using four wave mixing at room temperature, working at resonance with an atomic transition. Investigation into the properties of these states showed that the noise variances of the squeezed and anti-squeezed quadratures cannot be explained solely by losses. A theoretical model incorporating residual absorption and spontaneous emission provided an excellent agreement with experimental data without any adjusted parameter.
Article
Optics
Yann Bouchereau, Sopfy Karuseichyk, Raphael Guitter, Vishwa Pal, Fabien Bretenaker
Summary: This study numerically investigates the dynamical behavior of a one-dimensional ring array of lasers generated in a class-A degenerate cavity semiconductor laser. The results show that the class-A nature of the laser makes it more robust in generating topological charge carrying arrays of lasers.
Article
Optics
Yifan Sun, Yann Bouchereau, Sopfy Karuseichyk, Matthieu Ansquer, Sylvain Combrie, Nicolas Treps, Alfredo De Rossi, Fabien Bretenaker
Summary: In this study, the noise properties of harmonic cavity nanolasers were theoretically investigated by introducing a model of coupled equations of evolution of the modes, considering spontaneous emission. The influence of different laser parameters on the noise of the mode-locked regime was discussed in detail, shedding light on the noise characteristics in both continuous wave and mode-locked regimes.
Article
Optics
Debanuj Chatterjee, Yousra Bouasria, Fabienne Goldfarb, Yassine Hassouni, Fabien Bretenaker
Summary: A new architecture of phase sensitive optical frequency converter based on dual-pump phase sensitive amplification is proposed in this study. It allows generation of extra tones through nonlinear four-wave mixing, and the frequency channel to which the input tone is converted can be chosen by adjusting the phase of the input signal.
Article
Physics, Multidisciplinary
S. Liu, P. Neveu, J. Delpy, L. Hemmen, E. Brion, E. Wu, F. Bretenaker, F. Goldfarb
Summary: In this study, spin noise spectroscopy experiments were performed on metastable helium atoms at room temperature. It was found that both circular and linear birefringence fluctuations were present, and two noise resonances were isolated at the Larmor frequency and at twice the Larmor frequency, depending on the orientation of the probe field polarization. The simple structure of metastable helium allowed for the probing and modeling of these peak behaviors in terms of circular and linear dichroisms and birefringences as well as spin oscillation modes.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
J. Delpy, S. Liu, P. Neveu, C. Roussy, Th Jolicoeur, F. Bretenaker, F. Goldfarb
Summary: We theoretically and numerically investigate the spin fluctuations induced in a thermal atomic ensemble by an external fluctuating uniaxial magnetic field, in the context of a standard spin noise spectroscopy (SNS) experiment. We show that additional spin noise is excited, which dramatically depends on the magnetic noise variance and bandwidth, as well as on the power of the probe light and its polarization direction. We develop an analytical perturbative model proving that this spin noise first emerges from the residual optical pumping in the medium, which is then converted into spin fluctuations by the magnetic noise and eventually detected using SNS. The system studied is a spin-1 system, which thus shows both Faraday rotation and ellipticity noises induced by the random magnetic fluctuations. The analytical model gives results in perfect agreement with the numerical simulations, with potential applications in future experimental characterization of stray field properties and their influence on spin dynamics.
NEW JOURNAL OF PHYSICS
(2023)
Article
Optics
J. Delpy, S. Liu, P. Neveu, E. Wu, F. Bretenaker, F. Goldfarb
Summary: Light-induced nonequilibrium spin-noise spectroscopy is demonstrated to be an efficient technique for probing the structure and coherent effects in a transition. Metastable helium is used to show a dual-peak structure in the spin-noise spectrum around the Larmor frequency. The split spectra can be well reproduced by both numerical and analytical models, enabling a direct measurement of light shifts and level structure.
Article
Optics
S. Liu, P. Neveu, J. Delpy, E. Wu, F. Bretenaker, F. Goldfarb
Summary: The spin-noise mechanisms in a spin-1 system are studied in detail, both theoretically and experimentally. Different spin degrees of freedom result in spin-noise signals at the Larmor frequency or its second harmonic in the presence of a magnetic field. The dependence of the observed noise modes on the probed transition is shown to vary dramatically, depending on the Zeeman structure of the upper level of the transitions. These findings are successfully validated through measurements of spin-noise signals in an ensemble of metastable 4He at room temperature using three different transitions.
Proceedings Paper
Engineering, Electrical & Electronic
Maxime Descampeaux, Gilles Feugnet, Fabien Bretenaker
Summary: We present an original technique for reducing residual amplitude modulation in a fiber optic gyroscope using fibered components. We demonstrate its effectiveness by comparing the photodiode signal spectrum and the cavity's free spectral range with the classical control method.
2022 9TH IEEE INTERNATIONAL SYMPOSIUM ON INERTIAL SENSORS AND SYSTEMS (IEEE INERTIAL 2022)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Maxime Descampeaux, Gilles Feugnet, Fabien Bretenaker, Benoit Debord, Fetah Benabid, Frederic Gerome, Foued Amrani
Summary: This study describes and characterizes a resonant fiber ring cavity based on a photonic-bandgap hollow-core fiber. The fine spectral dependence of transmission losses in this cavity and their impact on the performance of the resulting resonator fiber optic gyroscope (RFOG) are explored.
2022 9TH IEEE INTERNATIONAL SYMPOSIUM ON INERTIAL SENSORS AND SYSTEMS (IEEE INERTIAL 2022)
(2022)
Proceedings Paper
Optics
G. Feugnet, M. Descampeaux, F. Bretenaker
Summary: This article investigates the design parameters of optical passive resonant gyroscope and applies them to the latest photonic integrated circuit and miniature resonant gyroscope mode technologies. By mitigating the influence of the Kerr effect through controlling the unbalance intensity, tactical grade gyroscope performance can be achieved.
LASER RESONATORS, MICRORESONATORS, AND BEAM CONTROL XXIV
(2022)
Proceedings Paper
Instruments & Instrumentation
Maxime Descampeaux, Gilles Feugnet, Fabien Bretenaker
Summary: In a resonator fiber optic gyroscope (RFOG), residual amplitude modulation (RAM) affects the stability of resonance frequency measurement and limits the performance of the gyroscope. The traditional RAM suppression method is not suitable for certain setups, prompting the proposal of a new strategy.
OPTICAL AND QUANTUM SENSING AND PRECISION METROLOGY II
(2022)
