Article
Optics
Liang Zhang, Jilin Zhang, Fufei Pang, Tingyun Wang, Liang Chen, Xiaoyi Bao
Summary: In this study, experimental evidence of transient replica symmetry breaking (RSB) was revealed in a photonic system based on Brillouin random fiber laser (BRFL). The activated random modes in BRFLs were found to have prolonged lifetimes, allowing the time-dependent statistics of the Parisi overlap parameter to be resolved and uncovering a compelling analogy between transient RSB dynamics and random mode evolution.
Article
Nanoscience & Nanotechnology
Jiangying Xia, Xiaojuan Zhang, Kaiming Zhou, Lin Zhang, Erlei Wang, Wenyu Du, Jiajun Ma, Siqi Li, Kang Xie, Benli Yu, Junxi Zhang, Zhijia Hu
Summary: Replica symmetry breaking (RSB) is recognized as a statistical analysis approach for understanding disorder and nonlinear interactions in complex systems. However, analyzing the nonlinear optical characteristics of random lasers (RL) in disordered gain medium via RSB is challenging due to the lack of a general RSB-based statistical analysis framework. This work reports tunable RSB in polymer fiber RL and investigates the effects of temperature and different structures on RSB experimentally and theoretically. It experimentally proves that RSB in RL is not robust, and disorder and temperature contribute to tunable RSB in RL, improving the statistical analysis framework for investigating the optical principles of RL using RSB. The finding of tunable RSB allows for investigating dynamical differences in various RL systems and broadens the use of spin-glass theory to explore the physical mechanism of RL.
Article
Nanoscience & Nanotechnology
Loredana M. Massaro, Silvia Gentilini, Alberto Portone, Andrea Camposeo, Dario Pisignano, Claudio Conti, Neda Ghofraniha
Summary: The study explores complex networks of light emitters as novel platforms for photonic circuits, successfully demonstrating the use of nanoscale random lasers. Heterogeneous random lasers made of ribbon-like and highly porous fibers show a novel emission effect by alternately switching on and off with different pumping light intensities. The observed blinking effect in the emitting fibers is attributed to mode interaction along light guiding fibers, opening up new possibilities for flexible photonic networks with specific and adaptable activity.
Article
Optics
Haiyang Wang, Chen Chen, Ping Lu, Stephen Mihailov, Liang Chen, Xiaoyi Bao
Summary: In this study, a polarization-maintaining random fiber grating ring (PM-RFGR) resonator is proposed and demonstrated for achieving high-precision frequency stabilization. By integrating the RFGR resonator with a random fiber laser, longitudinal modes are suppressed and mode-hopping-free operation is achieved. Experimental results show that small frequency drift can be achieved and an all optical locking mechanism is provided.
Article
Instruments & Instrumentation
Yuxi Pang, Yanping Xu, Xian Zhao, Zengguang Qin, Zhaojun Liu
Summary: This paper presents the experimental demonstration of a low-noise Brillouin random fiber laser (BRFL) with stabilized lasing output and narrow linewidth. The use of stimulated Brillouin scattering and Rayleigh scattering as the gain and feedback mechanisms, along with the introduction of a saturable absorption ring, results in a laser with improved stability and lower noise.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Optics
P. K. Nideesh, C. S. Chitra Lekha, R. Antoine, N. Kalarikkal
Summary: This article explores the statistics of spectral features, particularly shot-to-shot intensity fluctuations, in a potassium sodium niobate-dye colloidal system used as a random lasing platform. Correlations between spectral intensity fluctuations were analyzed, along with the underlying physical process and spectral characteristics. Pearson correlation coefficients were calculated and correlation plots were generated to better understand the correlations. The spectral position and spacing of the spikes were also examined to gain insights.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Zichao Zhou, Haiyang Wang, Yuan Wang, Liang Chen, Xiaoyi Bao
Summary: This study investigates the interaction between random lasers and gain medium by characterizing the time-resolved distributed acoustic wave generated by a Brillouin random fiber laser (BRFL) using optical time domain reflectometry. The results show the dynamic properties of the acoustic wave, reflecting the gain dynamics of the BRFL. The distributed characterization methods utilized in this paper offer a new perspective to understand the fundamental physics of the random lasing process and its noise property.
PHOTONICS RESEARCH
(2021)
Article
Optics
Lewen Zhou, Yaozong Hu, Wenlong Zheng, Pengbai Xu, Zhensen Gao, Xinyong Dong
Summary: A triple-wavelength thulium-doped fiber random laser with a 10 cm long random fiber grating and a superimposed fiber Bragg grating as the wavelength-selective mirror was demonstrated. The use of a femtosecond laser inscribed random fiber grating in single-mode fibers provided strong random distributed feedback, resulting in a relatively low threshold power. Triple-wavelength random laser output at wavelengths of 1943.6, 1945.0, and 1946.3 nm was achieved with a low threshold power of 2.01 W and good wavelength stability using a 793 nm laser diode.
Article
Optics
Yuxi Pang, Shaonian Ma, Xian Zhao, Zengguang Qin, Zhaojun Liu, Yanping Xu
Summary: A broadband high-sensitivity fiber-optic acoustic sensor based on Brillouin random fiber laser (BRFL) is proposed and demonstrated. The sensor utilizes a double coupler fiber ring resonator (DCFRR) in the BRFL as the sensing element, which filters out redundant random modes and ensures high-quality lasing output. The experimental results show that the sensor has a broadband frequency response and high sensitivity, making it suitable for detecting acoustic signals in both low-frequency and high-frequency regions with a high signal-to-noise ratio.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Jiancheng Deng, D. Churkin, Zuowei Xu, Xuewen Shu
Summary: This paper proposes a stable single wavelength random fiber laser for high temperature sensing and demonstrates its feasibility through experimentation. By designing a partial-reflection random fiber grating, stability is achieved with one reflection peak higher than the others. The laser achieves temperature sensing in the range from 25 degrees Celsius to 500 degrees Celsius.
Article
Optics
Edwin D. Coronel, Avishek Das, Manoel L. da Silva-Neto, Ivan R. R. Gonzalez, Anderson S. L. Gomes, Ernesto P. Raposo
Summary: In this study, the statistical properties of intensity fluctuations in a multimode Q-switched Nd:yttrium aluminum garnet laser were investigated using a modified Pearson correlation coefficient. It was found that above threshold, the system exhibits a photonic ferromagnetic-like spontaneous mode-locking phase with replica symmetry breaking. Different from photonic glassy phase in random lasers, a relevant fraction of modes oscillate coherently in this system, but the synchronous oscillation of some modes is frustrated with the replica symmetry breaking.
Article
Optics
Yanan Niu, Pinggang Jia, Jianhui Su, Jingyi Wang, Guowen An, Qianyu Ren, Jijun Xiong
Summary: We propose a tunable random fiber laser based on the combination of random grating and highly reflective fiber Bragg grating to reduce the pumping threshold and achieve a short-cavity single-mode transmission with a narrow-linewidth. The random grating is regarded as a linear combination of uniform fiber gratings with different periods. We constructed a random fiber laser with a linewidth of 1.68 kHz and a threshold of 29.2 mW using the random grating and highly reflective FBG combined with an erbium-doped fiber. By changing the central wavelength of the high-reflection FBG, the tunable wavelength of the output laser was realized, and the tunable range was 0.847 nm (1549.110-1549.957 nm). The proposed laser has the advantages of a lower threshold, shorter cavity length, narrower linewidth, and a relatively simple structure compared with other lasers.
Article
Optics
Liang Zhang, Zenghuan Qiu, Zhelan Xiao, Jilin Zhang, Fufei Pang, Tingyun Wang, Xiaoyi Bao
Summary: This paper proposes and demonstrates, for the first time, a frequency-stabilized Brillouin random fiber laser realized by a self-inscribed transient population grating. The grating is formed by the redistribution of population in erbium-doped fibers through bidirectionally injected phonon-controlled random laser beams. The long-lifetime metastable ion states in the fibers prolong the time dynamics of a stimulated Brillouin scattering laser, suppressing significant random modes and establishing one dominating lasing mode with milliseconds of lifetime through the competition of numerous random modes.
Article
Optics
Jianqun Cheng
Summary: A new eight-wavelength erbium-doped fiber laser utilizing a linear cavity structure was designed and experimentally authenticated. The laser consisted of two Sagnac loops, which used tilted fiber gratings and sampled fiber gratings to generate multi-wavelength output. Experimental results showed that the laser had narrow spectral linewidths and high optical signal-to-noise ratios.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Qian Yang, Hui Zou, Yu-Gang Shee, Zuxing Zhang
Summary: We propose a Brillouin-Raman random fiber laser with enhanced synergistic nonlinearity for ultra-wide bandwidth Brillouin comb generation. The augmented synergistic nonlinearity, including enhanced Rayleigh scattering (RS) effect, stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS), is achieved in a hybrid fiber (a fiber combination of a 7.2-km dispersion compensation fiber and a 10-km single-mode fiber) under a strong Raman pumping condition. In the experiments, the multi-wavelength Brillouin comb with an ultra-wide bandwidth of 63.5 nm (1513 nm-1576.5 nm) with frequency spacing of double Brillouin frequency shift, which is the largest bandwidth from Brillouin fiber lasers, to the best of our knowledge, has been achieved. The proposed ultra-wide bandwidth Brillouin-Raman fiber laser has potential applications in optical communication, optical wavelength division multiplexing, and fiber sensing.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
Yuan Wang, Ping Lu, Stephen Mihailov, Liang Chen, Xiaoyi Bao
Summary: This study introduces a method using referenced random fiber grating to monitor laser frequency variations, which enables successful dynamic strain reconstruction within the frequency range of 0.01 to 20 Hz. Utilizing this method, the minimum detectable frequency drifting is achieved, and the signal-to-noise ratio is enhanced.
Article
Optics
Haiyang Wang, Chams Baker, Liang Chen, Xiaoyi Bao
Summary: By designing and fabricating elliptical-core chalcogenide-polymethyl methacrylate microfibers, the impact of birefringence on stimulated Brillouin scattering was explored. Results showed that high-birefringence ECORE microfibers are important for Brillouin sensing, with tunable high birefringence and ultrahigh nonlinearity.
Review
Chemistry, Analytical
Stephen J. Mihailov, Cyril Hnatovsky, Nurmemet Abdukerim, Robert B. Walker, Ping Lu, Yanping Xu, Xiaoyi Bao, Huimin Ding, Manny De Silva, David Coulas, Dan Grobnic
Summary: Recent progress in the use of infrared femtosecond lasers for fabricating optical fiber sensors, such as fiber Bragg gratings and random fiber gratings, has enabled advancements in through-the-coating fabrication of Bragg gratings in ultra-thin fiber filaments and novel applications in distributed temperature sensing and fiber laser sensors.
Article
Optics
Zichao Zhou, Haiyang Wang, Yuan Wang, Liang Chen, Xiaoyi Bao
Summary: This study investigates the interaction between random lasers and gain medium by characterizing the time-resolved distributed acoustic wave generated by a Brillouin random fiber laser (BRFL) using optical time domain reflectometry. The results show the dynamic properties of the acoustic wave, reflecting the gain dynamics of the BRFL. The distributed characterization methods utilized in this paper offer a new perspective to understand the fundamental physics of the random lasing process and its noise property.
PHOTONICS RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
Huibo Fan, Liang Chen, Xiaoyi Bao
Summary: A tension-compression strain sensor has been developed with high strain sensitivity, large strain range, low temperature, and polarization crosstalk, utilizing an asymmetric off-core microsphere-waveguide structure. The sensor achieves improved performance by reducing interference from high-order modes and enhancing strain sensitivity, with increased strain range for tension and compression.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Huibo Fan, Hongwei Fan, Cong Lu, Qiming Yin, Xiaoyi Bao
Summary: This study proposes a U-shape core-offset fiber sensor with four fiber segments for large strain sensing. The sensor utilizes a spring-like microstructure fiber with a large transverse bending radius to achieve continuous strain detection. The sensor has high sensitivity and a large strain range, enabling both compression and tension measurement.
Article
Acoustics
Liam Kelly, Pierre Berini, Xiaoyi Bao
Summary: This article proposes a novel method for analyzing acoustic Fabry-Perot spectra to determine the key characteristics of surface acoustic wave (SAW) waves and cavities. The method provides an intuitive approach for determining the free surface velocity, attenuation, and reflection of IDTs, which are crucial design parameters. The experimental results validate the effectiveness of the proposed method.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Engineering, Electrical & Electronic
Haiyang Wang, Zichao Zhou, Liang Chen, Xiaoyi Bao
Summary: The study experimentally characterizes the acoustic wave coupling in a dual-wavelength orthogonal polarized Brillouin random fiber laser based on polarization-maintaining fiber. The investigation reveals the dynamics of intensity and frequency of the dual-wavelength laser and single-wavelength laser, as well as the correlation peaks in the Pearson's correlation coefficient spectrum. The study also explores the lower laser frequency drift, larger relative intensity fluctuation, and replica symmetry breaking observed in the dual-wavelength Brillouin random lasing process.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Liam Kelly, Howard Northfield, Sabaa Rashid, Xiaoyi Bao, Pierre Berini
Summary: A new tri-layer lift-off photolithography technique is proposed for the fabrication of high frequency SAW devices, utilizing a BARC layer to improve resolution over traditional techniques. The technique enables reliable fabrication and excellent agreement with numerical results.
MICROELECTRONIC ENGINEERING
(2022)
Article
Optics
Haiyang Wang, Chams Baker, Liam Kelly, Pedro Tovar, Liang Chen, Xiaoyi Bao
Summary: This paper proposes highly sensitive broadband ultrasound sensors based on fused dual-core chalcogenide-polymethyl methacrylate (As2Se3-PMMA) microfibers. The ultrasound response is determined by the differential slope of the transmission spectra in the dual-core microfiber, and the sensing of ultrasound waves with and without an aluminum plate is demonstrated. A broadband frequency range and high signal-to-noise ratio (SNR) are achieved in the compact fused dual-core As2Se3-PMMA microfiber ultrasound sensor.
Article
Optics
Liang Zhang, Zenghuan Qiu, Zhelan Xiao, Jilin Zhang, Fufei Pang, Tingyun Wang, Xiaoyi Bao
Summary: This paper proposes and demonstrates, for the first time, a frequency-stabilized Brillouin random fiber laser realized by a self-inscribed transient population grating. The grating is formed by the redistribution of population in erbium-doped fibers through bidirectionally injected phonon-controlled random laser beams. The long-lifetime metastable ion states in the fibers prolong the time dynamics of a stimulated Brillouin scattering laser, suppressing significant random modes and establishing one dominating lasing mode with milliseconds of lifetime through the competition of numerous random modes.
Article
Optics
Chunhua Wang, Ruijuan Gao, Nian Fang, Xiang Gu, Keshuai Wu, Liang Chen, Xiaoyi Bao
Summary: This paper investigates the orthogonal polarization clamping behavior of a random Brillouin fiber laser (RBFL) using polarization maintaining fiber (PMF). The research demonstrates the clamping of the state of polarization of lasing light from the RBFL to one of the two principal axes of PMFs under certain conditions. Additionally, an orthogonal polarization interleaving multi-wavelength (OPIMW) RBFL is also demonstrated based on this polarization clamping manipulation.
OPTICS COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Liam Kelly, Chen Chen, Xiaoyi Bao, Pierre Berini
Summary: A two-port surface acoustic wave (SAW) strain sensor based on measuring acoustic Fabry-Perot resonance peaks is demonstrated. The frequency sensitivity to strain of the cavity resonances was analyzed and a maximum frequency stability cavity length was determined. Cross-correlation analysis was introduced to improve the detection of SAW resonance frequency shifts. The sensor showed high frequency sensitivity and a low minimum strain resolution.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Review
Chemistry, Analytical
Shaonian Ma, Yanping Xu, Yuxi Pang, Xian Zhao, Yongfu Li, Zengguang Qin, Zhaojun Liu, Ping Lu, Xiaoyi Bao
Summary: This paper reviews the importance and advantages of fiber-optic high-temperature sensors in various industries. It also introduces the recent progress in transitioning from glass to crystal fiber sensing solutions and discusses the future prospects and challenges.
