Article
Engineering, Electrical & Electronic
Huafeng Lu, Guolu Yin, Zeheng Zhang, Duidui Li, Laiyang Dang, Yulong Cao, Leilei Shi, Tao Zhu
Summary: This paper proposes and demonstrates a novel concept of Brillouin fiber swept laser with narrow linewidth based on mode following effect. By utilizing the synergy of the Brillouin gain spectrum and cavity mode, real-time mode following effect is achieved. Experimental results show that the obtained maximum continuous frequency sweep range is approximately 445.76 MHz, consistent with the theoretical analysis. This new type of fiber swept laser has huge potential application value in optical sensing and communication system.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Hanshuo Wu, Jiaxin Song, Pengfei Ma, Wei Liu, Shuai Ren, Guangjian Wang, Ruixian Li, Hu Xiao, Liangjin Huang, Jinyong Leng, Zhiyong Pan, Pu Zhou
Summary: In this work, a bidirectional tandem-pumped high-power narrow-linewidth confined-doped ytterbium fiber amplifier is demonstrated based on side-coupled combiners. The nonlinear effects, including stimulated Raman (SRS) and stimulated Brillouin scattering (SBS), are effectively suppressed, and the transverse mode instability (TMI) effect is mitigated through the combination of confined-doped fiber design and bidirectional tandem pumping scheme.
Article
Materials Science, Multidisciplinary
Wenchang Lai, Pengfei Ma, Jiaxin Song, Shuai Ren, Wei Liu, Pu Zhou
Summary: This paper demonstrates the application of multi-phase coded signal (MPCS) modulation on a high power narrow-linewidth polarization-maintained all-fiber amplifier for managing stimulated Brillouin scattering (SBS) effect. By combining this technique with laser gain competition, the output power of the amplifier can be increased while maintaining high polarization extinction ratio and output beam quality. This power scaling result provides a feasible method for linewidth controlling in high power fiber amplifiers, which is significant for high-power coherently and spectrally beam combining systems.
RESULTS IN PHYSICS
(2021)
Article
Physics, Applied
Will Freeman
Summary: Theoretical studies on Terahertz quantum cascade structures using double longitudinal-optical phonon intrawell scattering for depopulation have shown that greater depopulation transitions result in reduced phonon absorption thermal backscatter, enabling higher operating temperatures and potential for room temperature operation above 300K. Results also suggest that improving depopulation transitions can enhance temperature limits in single phonon structures.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Yue Wang, Shuang Qiu, Mengzhen Yang, Shengqiang Shen, Shiyin Li
Summary: We propose and analyze a wideband frequency-tunable optoelectronic oscillator based on stimulated Brillouin scattering (SBS) and gain-loss superposition. By launching three new pump lights with certain frequency intervals into a highly nonlinear fiber (HNLF), the linewidth of the output signal is highly reduced compared with conventional OEOs based on SBS. The proposed method has the potential to effectively reduce the linewidth of any OEO based on SBS.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
Zhu Feng, Gan Yiyu, Ji Libin, Wen Qiao
Summary: The study demonstrates a simple method to control the size and solution concentration of MXene-QDs, and systematically investigates their optical properties, showing that the nonlinear optical characteristics of QDs can be adjusted through the QD size and solution concentration. Smaller sizes and proper concentrations of QDs are more favorable for ultra-narrow photonics applications.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Yu Xia, Min Li, Zheng Liu, Dikai Liu, Songtao Bai, Mingyang He, Xuling Shen, Kangwen Yang, Shuai Yuan, Ming Yan, Kun Huang, Heping Zeng
Summary: In this work, an adaptive clock signal was extracted from optical beat note to correct the unstable sampling interval caused by timing jitter. A loosely active frequency-stabilized scheme acted as real-time feedback, leading to the construction of a long-term stable terahertz dual-comb spectrometer with high spectral resolution, comb linewidth, precision, and operational duration. This compensation of timing jitter allows for precise acquisition of THz pulses, making this terahertz comb spectrometer suitable for field deployment.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Shuai Wang, Zun-Ren Lv, Qiu-Lu Yang, Sheng-Lin Wang, Hong-Yu Chai, Lei Meng, Dan Lu, Chen Ji, Xiao-Guang Yang, Tao Yang
Summary: A high-power, ultra-low-noise 1.3 μm InAs/GaAs QD distributed feedback laser is demonstrated by combining atom-like quantum dot materials and advanced lateral gratings. This laser achieves stable single-longitudinal-mode output power of 100 mW from 25 celcius to 85 celcius, with a maximum side mode suppression ratio of 62.6 dB. It also demonstrates a high temperature stability, a record-narrow intrinsic linewidth of 1.62 kHz, and a strong tolerance to external optical feedback.
LASER & PHOTONICS REVIEWS
(2023)
Correction
Optics
Ting Feng, Dongliang Ding, Fengping Yan, Ziwei Zhao, Hongxin Su, X. Steve Yao
Summary: This paper presents a corrected equation from our previous publication and follows the terms of the OSA Open Access Publishing Agreement.
Article
Computer Science, Information Systems
Dongyuan Li, Ting Feng, Weiwei Sun, Shengbao Wu, Fengping Yan, Qi Li, Xiaotian Steve Yao
Summary: A narrow-linewidth eight-wavelength-switchable erbium-doped fiber laser is proposed and demonstrated. The laser utilizes a cascaded superimposed high-birefringence fiber Bragg grating to determine the lasing wavelengths and combines a Fabry-Perot filter and a single-coupler ring for single-longitudinal-mode (SLM) oscillation. Stabilized and switchable lasing modes are achieved by introducing enhanced polarization-hole-burning effect. The proposed fiber laser has a wide range of applications in optical communication, fiber sensing, and wavelength-division-multiplexing.
Article
Optics
Jing Cao, Xiaolong Chen, Yifeng Yang, Binglin Li, Zhaohe Liu, Xiaochen Guo, He Wang, Junqing Meng, Bing He
Summary: In this study, a cascaded pseudorandom binary sequence and sinusoidal phase modulation method is used to widen the laser spectrum for suppressing stimulated Brillouin scattering. The results show that this method effectively suppresses stimulated Brillouin scattering and improves the output power and threshold of the laser. When the RMS linewidth of the seed source is 46 GHz, the output power reaches 4.93 kW after four-stage fiber amplification, with a system slope efficiency of 78% and a beam quality factor M-2 below 1.2.
CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG
(2023)
Article
Optics
Tu T. Nguyen, Sonia Boscolo, Abdallah A. Ali, Stylianos Sygletos, Shigehiro Takasaka, Ryuichi Sugizaki, Andrew D. Ellis
Summary: A new two-stage digital signal processing scheme is proposed to suppress phase distortion in a dual-pump fibre-based optical phase conjugation system. The scheme demonstrates a signal-to-noise ratio improvement of over 4 dB with 16/64/256 quadrature-amplitude modulation signals, even at pump-phase mismatch values as high as 8 degrees.
Article
Physics, Multidisciplinary
Wenchang Lai, Pengfei Ma, Jiaxin Song, Shuai Ren, Wei Liu, Pu Zhou
Summary: In this study, the SBS thresholds of fiber amplifiers with different spectral distributions were compared under the same spectral complex degree of coherence. The results showed that fiber amplifiers with rectangular spectra had the highest SBS threshold, while maintaining the same combining efficiency in CBC systems. This research provides a feasible method for spectrum design in high power narrow linewidth fiber amplifiers used in CBC systems.
FRONTIERS IN PHYSICS
(2022)
Article
Optics
Liuyuan Tao, Fei Wang, Guangqiong Xia, Zhengmao Wu
Summary: A tunable single-longitudinal-mode (SLM) narrow linewidth Brillouin fiber laser based on parity-time (PT) symmetry is proposed and demonstrated. In the proposed scheme, the SLM operation is achieved through the dual selecting-mode mechanism. A narrow-band gain curve induced by stimulated Brillouin scattering (SBS) is used as a filter for selecting mode preliminary, and a PT-symmetric structure is formed by using a Sagnac loop to break the PT symmetry and enable SLM oscillation.
LASER PHYSICS LETTERS
(2023)
Article
Multidisciplinary Sciences
Paolo Micheletti, Urban Senica, Andres Forrer, Sara Cibella, Guido Torrioli, Martin Frankie, Mattias Beck, Giacomo Scalari, J'rome Faist
Summary: Quantum cascade lasers (QCLs) offer an intriguing opportunity for generating on-chip optical dissipative Kerr solitons (DKS). Recent observations of DKS in mid-infrared ring QCLs have paved the way for achieving DKS at longer wavelengths. Terahertz ring QCLs with anomalous dispersion were realized using a waveguide planarization technology platform. A concentric coupled waveguide approach was implemented for dispersion compensation, while a passive broadband bullseye antenna improved power extraction and far field. The presence of solitons was confirmed through hysteric behavior, phase difference measurements, and intensity time profile reconstruction, which matched well with numerical simulations based on the Complex Ginzburg-Landau Equation (CGLE).
Article
Multidisciplinary Sciences
Guillaume Vanderhaegen, Corentin Naveau, Pascal Szriftgiser, Alexandre Kudlinski, Matteo Conforti, Arnaud Mussot, Miguel Onorato, Stefano Trillo, Amin Chabchoub, Nail Akhmediev
Summary: The classical theory of modulation instability is a linear approximation with limitations, but weakly nonlinear theory provides a better explanation for experimental results, showing that MI has a wider band of unstable frequencies than predicted. The range of areas where the nonlinear theory of MI can be applied is actually much larger than considered.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Optics
Guillaume Vanderhaegen, Pascal Szriftgiser, Matteo Conforti, Alexandre Kudlinski, Maxime Droques, Arnaud Mussot
Summary: In this study, it was shown that for short pulses, the amplification process remains linear, allowing for very high peak powers to be achieved. Additionally, the pulse duration was found to have an impact on the gain and pump saturation.
Article
Physics, Applied
Charbel Cherfan, Maxime Denis, Denis Bacquet, Michel Gamot, Samir Zemmouri, Isam Manai, Jean-Francois Clement, Jean-Claude Garreau, Pascal Szriftgiser, Radu Chicireanu
Summary: The compact and versatile multi-frequency laser system utilizes frequency-doubled fiber-optic telecom beams for laser-cooling potassium atoms, enabling the trapping of a large number of atoms at sub-Doppler temperatures for versatile and transportable ultracold atom setups.
APPLIED PHYSICS LETTERS
(2021)
Article
Computer Science, Interdisciplinary Applications
Pascal Szriftgiser, Edgardo S. Cheb-Terrab
Summary: This paper discusses the hidden SO(4) symmetry of the hydrogen atom noticed by Pauli in the early stages of quantum mechanics, and how the spectrum can be derived using a computer algebra system. The presentation showcases the method and technique of performing quantum-and-tensor-algebra computations using CAS, highlighting the advantages of CAS in handling tedious, time-consuming, and error-prone problems.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Julian Webber, Yuichiro Yamagami, Guillaume Ducournau, Pascal Szriftgiser, Kei Iyoda, Masayuki Fujita, Tadao Nagatsuma, Ranjan Singh
Summary: The recent discovery of the topological valley photonic crystal shows promising potential for high-speed inter-device communications with near zero-loss bends, zero back-scattering and zero junction-area features. Experimental results demonstrate low dispersion in the photonic bandgap region as the number of bends increase.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Florent Bessin, Corentin Naveau, Matteo Conforti, Alexandre Kudlinski, Pascal Szriftgiser, Arnaud Mussot
Summary: In this study, we investigated the phase-sensitive properties of modulation instability with harmonic seeding in passive fiber resonators. Theoretical investigations showed that the dynamics of the system is sensitive to the relative phase between input signal, idler, and pump waves. An advanced multi-heterodyne measurement technique was developed to record the real time evolution of the power and phase of the output cavity field.
COMMUNICATIONS PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Myungsoo Kim, Guillaume Ducournau, Simon Skrzypczak, Sung Jin Yang, Pascal Szriftgiser, Nicolas Wainstein, Keren Stern, Henri Happy, Eilam Yalon, Emiliano Pallecchi, Deji Akinwande
Summary: Non-volatile analogue switches made from monolayer molybdenum disulfide can operate at frequencies of 480 GHz and achieve data transmission rates of 100 Gbit s(-1), making them of potential use in sixth-generation communication technology.
NATURE ELECTRONICS
(2022)
Article
Optics
Clement Hainaut, Jean-Francois Clement, Pascal Szriftgiser, Jean Claude Garreau, Adam Rancon, Radu Chicireanu
Summary: Anderson localization is a phenomenon that inhibits the transport of classical and quantum waves in a disordered medium. In one dimension, all states are localized and the decay of the initially narrow wave packet follows an exponential profile on the scale of the localization length. However, the stationary localized distribution has a different shape from a purely exponential profile, which was computed by Gogolin almost fifty years ago. By using a quantum simulator and an experimental platform, we study the properties of the asymptotic distribution and compare it with the analytical prediction.
EUROPEAN PHYSICAL JOURNAL D
(2022)
Article
Engineering, Electrical & Electronic
Simon Nellen, Sebastian Lauck, Emilien Peytavit, Pascal Szriftgiser, Martin Schell, Guillaume Ducournau, Bjoern Globisch
Summary: In this study, a wireless link at 300 GHz using a fiber-coupled PIN photodiode as the transmitter was demonstrated. Different antenna designs and modulation formats were investigated, and the optimal driving conditions of the photodiode were identified, resulting in high bandwidth and low bit-error ratio transmission.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Daniele Pirrone, Antonio Ferraro, Dimitrios C. Zografopoulos, Walter Fuscaldo, Pascal Szriftgiser, Guillaume Ducournau, Romeo Beccherelli
Summary: We demonstrate the effectiveness of frequency selective surface filters in wireless communications at low terahertz (THz) frequencies. The filters have been shown to have minimal impact on signals while effectively rejecting interfering signals, making them a promising solution for efficient spectrum management in future 6G wireless applications.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Abhishek Kumar, Manoj Gupta, Prakash Pitchappa, Nan Wang, Pascal Szriftgiser, Guillaume Ducournau, Ranjan Singh
Summary: Researchers demonstrate a phototunable topological waveguide and demultiplexing chip for 6G communication. The chip features a record-breaking single-channel 160 Gbit/s communication link and excellent channel isolation. This new class of phototunable, on-chip topological terahertz devices hold promise for achieving high-speed and advanced functionalities in future communication systems.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Dennis Maes, Sam Lemey, Gunther Roelkens, Mohammed Zaknoune, Vanessa Avramovic, Etienne Okada, Pascal Szriftgiser, Emilien Peytavit, Guillaume Ducournau, Bart Kuyken
Summary: Integrated photonics is a promising technology for telecommunication and data communication applications, and silicon nitride (SiN) is an interesting platform due to its low-loss waveguides. However, active devices are lacking, and hybrid integration is needed. In this study, high-speed uni-traveling-carrier photodiodes were successfully integrated into a SiN-platform using micro-transfer-printing, enabling high-performance detectors. The integrated detectors showed high responsivity, low dark current, and bandwidth, and demonstrated potential for terahertz communication.
Article
Optics
Guillaume Vanderhaegen, Pascal Szriftgiser, Alexandre Kudlinski, Andrea Armaroli, Matteo Conforti, Stefano Trillo, Arnaud Mussot
Summary: We report the observation of parametric gain band distortion in the nonlinear regime of modulation instability in dispersion oscillating fibers. We show that the maximum gain is shifted beyond the boundaries of the linear parametric gain band. Experimental findings are validated using numerical simulations.
Article
Optics
Gaetan Leveque, Yan Pennec, Pascal Szriftgiser, Alberto Amo, Alejandro Martinez
Summary: The realization of photonic crystal waveguides with high topological protection allows for robust light propagation and compact device design through sharp bends and splitters. This study evaluates the conversion between helical topological edge modes at sharp bends and splitters using valley topological triangular resonators coupled to an input waveguide. Numerical simulations show evidence of backward scattering and helicity conversion at cavity corners and splitters, which can result in transmission minima and split resonances. A phenomenological model is introduced to quantify these effects and compare with numerical simulations, demonstrating the importance of helicity conversion at corners and sharp bends. This approach enables predictive calculations for large devices and is crucial for the design of photonic devices with compactness and low losses through topological conduction of electromagnetic waves.
Article
Optics
Guillaume Vanderhaegen, Pascal Szriftgiser, Alexandre Kudlinski, Matteo Conforti, Andrea Armaroli, Arnaud Mussot
Summary: The thermalization process of the Fermi-Pasta-Ulam-Tsingou recurrence process in optical fibers is observed. The transition from a reversible regime to an irreversible one is shown, revealing a spectrally thermalized state. The study is significant for understanding the thermalization process in optical fibers.
