Article
Optics
Liping Shi, Ihar Babushkin, Anton Husakou, Oliver Melchert, Bettina Frank, Juemin Yi, Gustav Wetzel, Ayhan Demircan, Christoph Lienau, Harald Giessen, Misha Ivanov, Uwe Morgner, Milutin Kovacev
Summary: Asymmetric plasmonic nanojunctions have shown potential for converting femtosecond optical pulses to current bursts on-chip, with a bandwidth reaching the multi-terahertz scale, albeit currently only achieved at low temperatures and pressures. These nanoscale devices are of great interest for novel ultrafast electronics and opto-electronic applications, with studies revealing the mechanisms of photoemission from plasmonic nanojunctions and fundamental limitations on the speed of optical-to-electronic conversion.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Chaoyang Wang, Jinyuan Liu, Ziyang Zhang
Summary: This study demonstrates that a polymer waveguide fabricated under simple and low-cost technology can effectively transmit femtosecond laser pulses and achieve high coupling efficiency with optical fibers.
Article
Physics, Multidisciplinary
Shuo Zhou, Jun-Fei Zhao, Lei Wang
Summary: We investigate the nonautonomous molecule waves of the inhomogeneous Hirota equation describing the propagation of femtosecond pulses in inhomogeneous fibers. The breather molecules of the equation under different cases of dispersion and nonlinearmodulation are obtained using the characteristic line analysis. We find that the inhomogeneous coefficients have influences on the distance between constituent pulses, and reveal that there is no full-transition mode for the inhomogeneous Hirota equation.
Article
Optics
Thiago D. S. De Menezes, Chaoran Tu, Valentin Besse, Maurice O'Sullivan, Vladimir S. Grigoryan, Curtis R. Menyuk, Ivan T. Lima
Summary: This study investigates the robustness of a nonlinear frequency-division multiplexing (NFDM) system based on the Zakharov-Shabat spectral problem (ZSSP). The study focuses on analyzing the impact of various fiber impairments on the system's performance, including third-order dispersion, the Raman effect, amplified spontaneous emission (ASE) noise, and fiber losses with lumped gain. The results show that the maximum launch power is limited by these impairments, with fiber losses being the most significant factor.
Article
Optics
Yuhang Wu, Hamed Pourbeyram, Demetrios N. Christodoulides, Frank W. Wise
Summary: Experiments were conducted on Kerr beam cleaning in graded-index multimode fiber with sub-nanosecond and femtosecond pulses at wavelengths characterized by normal dispersion. Weak beam cleaning was observed experimentally, with strong temporal evolution of the pulse. Numerical simulations qualitatively matched the experimental trends.
Article
Engineering, Electrical & Electronic
Jun He, Jiafeng Wu, Xizhen Xu, Changrui Liao, Shen Liu, Xiaoyu Weng, Liwei Liu, Junle Qu, Yiping Wang
Summary: We present a cylindrical telescope assisted femtosecond laser direct writing technology for fabricating plane-by-plane Bragg gratings in sapphire fibers. The technique allows for the effective extension of the refractive index modulation (RIM) regions and improves spectral characteristics. The resulting sapphire fiber Bragg gratings (SFBGs) exhibit enhanced reflectivity and reduced bandwidth, making them suitable for high temperature measurement applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Gai Zhou, Songnian Fu, Meng Xiang, Alan Pak Tao Lau, Yuwen Qin
Summary: In recent years, the nonlinear Fourier transform (NFT) has been extensively studied as a method for communication and characterization in nonlinear optical systems. The bidirectional algorithm, which calculates b-coefficients at a cutting point within the temporal window, has been proposed to accurately compute these coefficients on discrete eigenvalues. This paper introduces a cutting-point criterion for the bidirectional algorithm of the Manakov equation and compares it with existing criteria. The numerical results demonstrate that the proposed criterion significantly improves the accuracy, particularly for signals with numerous eigenvalues having large imaginary parts. The bidirectional algorithm with this criterion is valuable for decoding DP-NFDM signals and characterizing vector soliton dynamics in Manakov equation systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Ivan Laryushin, Alexander Romanov
Summary: This paper presents an analytical method for calculating the amplitudes of arbitrary spectral components of free electron currents under the action of multicolor ionizing laser pulses. The method is used to study the characteristics of a frequency-tunable third harmonic in an optical parametric generator.
Article
Chemistry, Physical
Lulu Fu, Yan Fang, Zihao Guan, Zhiyuan Wei, Rui Yang, Naying Shan, Fang Liu, Yang Zhao, Mingfei Zhang, Zhipeng Huang, Mark G. Humphrey, Chi Zhang
Summary: This paper presents a study on the synthesis of graphene-porphyrin nanoconjugate using the edge-functionalization method. The resulting nanostructure exhibits highly planar properties and strong nonlinear optical absorption. This technique provides a new approach to tune the nonlinear optical properties of graphene and opens up possibilities for the development of versatile optoelectronic materials.
Article
Optics
Govind P. Agrawal
Summary: This passage mainly introduces the author's activities during the 1980s that led to the publication of his book on nonlinear fiber optics.
Article
Optics
Hongye Li, Xin Tian, Hao Li, Baiyi Wu, Xiaofan Zhao, Meng Wang, Chenhui Gao, Binyu Rao, Xiaoming Xi, Zilun Chen, Zefeng Wang, Jinbao Chen
Summary: A pair of fiber Bragg gratings (FBGs) were fabricated using a visible femtosecond laser phase mask scanning technique on passive large-mode-area double-cladding fibers for multi-kilowatt fiber oscillators. The high-reflection (HR) and low-reflection (LR) FBGs have bandwidths of -1.6 nm and 0.3 nm, respectively. The all-fiber oscillator using these FBGs achieved a record output power of 5027 W with a slope efficiency of -82.1% and a beam quality factor M2 of -1.6 at maximum power. The thermal efficiency of the HR-FBG and the LR-FBG is 2.76 degrees C/kW and 1 degrees C/kW, respectively. This research provides an effective solution for robust high-power all-fiber laser oscillators.
CHINESE OPTICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Fengyi Chen, Xingyong Li, Ruohui Wang, Xueguang Qiao
Summary: Femtosecond laser point-by-point technology allows direct writing of FBGs into the cladding of optical fibers, creating CLFBGs with characteristics similar to conventional core-based FBGs. These compact CLFBGs, with low insertion loss, have application value in the fields of optical fiber sensors, communications, and lasers, particularly for manufacturing vector sensing devices.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Lu-Ting Chou, Hao-Hsuan Hung, Ai-Yin Liu, Shao-Hsuan Wu, Je-Chi Jang, Dong-Lin Zhong, Hui-Hsin Hsiao, Shih-Hsuan Chia
Summary: This work proposes a simple approach to independently manage a femtosecond source's spectral location and bandwidth. Self-phase-modulation-enabled spectral broadening is first analyzed, and a toy model is introduced to predict broadband spectral tuning. Bandwidth-dependent third-harmonic generation spectroscopy is performed, and the impact of laser bandwidth and pulse duration on two-photon images is investigated.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Ang Deng, Trivikramarao Gavara, Muhammad Rosdi Abu Hassan, Daiqi Xiong, Md Imran Hasan, Wonkeun Chang
Summary: A fiber-based approach generates mid-infrared femtosecond pulses in the 3-4 mu$\umu$m spectral region with microjoule-level single pulse energy. This is achieved in a gas-filled antiresonant hollow-core fiber that is pumped by a two-micron light source. The technique provides a new pathway to build an all-fiber-based mid-infrared supercontinuum source, which promises to be a powerful tool for ultrahigh sensitivity molecular spectroscopy.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Yuan He, Ning Li, Yi Feng, Xiaoyan Li, Dongyang Liu, Jing Huang, Ruiting Zhou, Man Wu, Lili Miao, Chujun Zhao
Summary: Highly stable two-dimensional (2D) hybrid organic-inorganic perovskite nanocrystals (PEA(2)PbI(4) NCs) were successfully prepared using liquid-phase exfoliation (LPE) method. The ultrafast nonlinear saturable absorption characteristics of these NCs were studied in the near-infrared to mid-infrared regime. Based on their unique nonlinear optical response, a high stable fiber laser with a pulse duration of approximately 531 fs and a signal-to-noise ratio of approximately 90 dB was achieved at 1.5 μm, and a robust nanosecond fiber laser with a pulse duration of approximately 553 ns and a signal-to-noise ratio of approximately 40 dB was obtained at 2.8 μm. These results demonstrate the potential of 2D perovskites as broadband pulse modulators for advanced optoelectronic applications.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Multidisciplinary Sciences
R. Tyumenev, J. Hammer, N. Y. Joly, P. St J. Russell, D. Novoa
Summary: Preservation of photon statistics is crucial for the implementation of quantum networks. Current methods have limited tunability and suffer from insertion loss and Raman noise. This study introduces a method using hydrogen-filled antiresonant-reflecting photonic crystal fibers for quantum-correlation-preserving frequency conversion.
Article
Chemistry, Analytical
Florian Schorn, Arabella Essert, Yu Zhong, Sahib Abdullayev, Kathrin Castiglione, Marco Haumann, Nicolas Y. Joly
Summary: We have developed an optofluidic method for efficient measurement of enantiomeric excess of chiral molecules at low concentrations. This method involves monitoring the optical activity induced by a Kagome-lattice hollow core photonic crystal fiber filled with a sub-mu L volume of chiral compounds. It also allows monitoring enzymatic racemization of R-mandelic acid.
ANALYTICAL CHEMISTRY
(2023)
Article
Optics
Philip St. J. Russell, Yang Chen
Summary: This paper investigates the localization of light in disordered or periodically structured dielectric media, with a focus on coreless photonic crystal fiber (PCF) drawn in a chiral form. A novel analytical model for twisted coreless PCF is presented, which offers excellent agreement with numerical solutions of Maxwell's equations and significantly reduces computational time. The study reveals the existence of exponentially localized helical Bloch modes (HBMs) in chiral coupled sub-core lattices, opening up new possibilities for 2D localization of light.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Christian Brahms, John C. Travers
Summary: We demonstrate a bright, efficient, and compact source of tuneable deep ultraviolet (DUV) ultrafast laser pulses based on resonant dispersive wave emission in hollow capillary fiber.
Article
Optics
Ang Deng, Trivikramarao Gavara, Muhammad Rosdi Abu Hassan, Daiqi Xiong, Md Imran Hasan, Wonkeun Chang
Summary: A fiber-based approach generates mid-infrared femtosecond pulses in the 3-4 mu$\umu$m spectral region with microjoule-level single pulse energy. This is achieved in a gas-filled antiresonant hollow-core fiber that is pumped by a two-micron light source. The technique provides a new pathway to build an all-fiber-based mid-infrared supercontinuum source, which promises to be a powerful tool for ultrahigh sensitivity molecular spectroscopy.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Yuxi Wang, Wonkeun Chang
Summary: We propose a novel antiresonant hollow-core fiber design with ultralow loss and exceptional single modedness at 1.55μm wavelength. The design achieves a confinement loss of less than 10-6 dB m-1 and excellent bending performance even at a tight bending radius of 3 cm. Moreover, it achieves a record-high higher-order mode extinction ratio of 8 x 105 by inducing strong coupling between the higher-order core modes and cladding hole modes. These guiding properties make it an excellent candidate for hollow-core fiber-enabled low-latency telecommunication systems.
Article
Optics
Mohammed Sabbah, Federico Belli, Christian Brahms, Fei Yu, Jonathan Knight, John C. Travers
Summary: We investigate soliton self-compression and photoionization effects in an argon-filled antiresonant hollow-core photonic crystal fiber pumped with a commercial Yb:KGW laser. Before the onset of photoionization, we demonstrate selfcompression of our 220 fs pump laser to 13 fs in a single and compact stage. By using the plasma driven soliton selffrequency blueshift, we also demonstrate a tunable source from 1030 to similar to 700 nm. We fully characterize the compressed pulses using sum-frequency generation time-domain ptychography, experimentally revealing the full time-frequency plasma-soliton dynamics in hollow-core fiber for the first time.
Article
Optics
Santiago Lopez-huidobro, Mohammad Noureddin, Maria Chekhova, Nicolas Y. JOLy
Summary: Researchers have successfully generated pairs of biphotons, one in the ultraviolet and its entangled partner in the infrared spectral range, using a xenon-filled single-ring photonic crystal fiber and four-wave mixing. By adjusting the gas pressure, the frequency of the biphotons can be tuned, with the ultraviolet photons ranging from 271 nm to 231 nm and their entangled partners ranging from 764 nm to 1500 nm. This breakthrough enables spectroscopy and sensing with undetected photons in the ultraviolet range.
Article
Multidisciplinary Sciences
Nicolas Couture, Wei Cui, Markus Lippl, Rachel Ostic, Defi Junior Jubgang Fandio, Eeswar Kumar Yalavarthi, Aswin Vishnuradhan, Angela Gamouras, Nicolas Y. Joly, Jean-Michel Menard
Summary: Slow motion movies can be used to monitor low-energy resonances and reveal fast structural or chemical transitions by replacing images with terahertz waves. By combining THz spectroscopy with a real-time monitoring technique, we have demonstrated the ability to resolve non-reproducible phenomena at 50k frames per second. Our experimental configuration using the photonic time-stretch technique allows for unprecedented data acquisition speeds and enables the study of fast irreversible processes at THz frequencies.
NATURE COMMUNICATIONS
(2023)
Article
Optics
M. Reduzzi, M. Pini, L. Mai, F. Cappenberg, L. Colaizzi, F. Vismarra, A. Crego, M. Lucchini, C. Brahms, J. C. Travers, R. Borrego-varillas, M. Nisoli
Summary: This article reports on the complete temporal characterization of ultrashort pulses generated by resonant dispersive wave emission in gas-filled hollow-capillary fibers. The energy of these pulses ranges from deep-ultraviolet to ultraviolet and they are continuously tunable. Temporal characterization of these ultrabroad pulses, which is particularly challenging in this spectral region, was achieved using an all-in-vacuum setup for self-diffraction frequency resolved optical gating (SD-FROG). Sub-3-fs pulses were measured, tunable from 250 nm to 350 nm, with a minimum pulse duration of 2.4 ± 0.1 fs.
Article
Optics
Charu Goel, Yuxi Wang, Seongwoo Yoo, Wonkeun Chang
Summary: By designing a special structure of hollow-core fiber, we have successfully inscribed a high reflection FBG inside, opening up new possibilities for the development of gas photonics.
Article
Optics
Teodora Grigorova, Christian Brahms, Federico Belli, John C. Travers
Summary: We investigated the nonlinear optical pulse dynamics of ultrashort laser pulses in gas-filled hollow capillary fibers with different dispersion regimes achieved by adjusting the gas pressure. The results showed various soliton-plasma effects in the anomalous dispersion regime, pulse splitting and cross-phase modulation near the zero-dispersion wavelength, and the generation of a broad and flat supercontinuum in the normal dispersion regime. The experimental results in the latter regime were influenced by self-focusing and ionization effects, which altered the spatial and temporal shape of the pulse.
Article
Physics, Fluids & Plasmas
Amdad Chowdury, Wonkeun Chang, Marco Battiato
Summary: Using a generalized nonlinear Schrodinger equation, the study investigates how a fundamental rogue wave transforms into a collection of solitons. The effects of third-order dispersion, self-steepening, and Raman-induced self-frequency shift are considered, and it is observed that the rogue wave has an impact on its surrounding continuous wave background and reshapes its own characteristics while multiple solitons are created. The study also demonstrates that the combination of these effects favors the generation of solitons near the emergence of the rogue wave, with the rogue wave itself becoming one of these solitons.
Article
Physics, Multidisciplinary
L. Genovese, M. Kellermeier, F. Mayet, K. Floettmann, G. K. L. Wong, M. H. Frosz, R. Assmann, P. St. J. Russell, F. Lemery
Summary: Emerging accelerator concepts are using high-frequency electromagnetic radiation to manipulate electron beams, which supports a variety of advanced applications. In this study, we propose a scheme using laser-driven large-core antiresonant optical fibers to manipulate the electron beams. We explore two general cases using different modes and demonstrate the potential for large energy modulations and the production of attosecond microbunches. These findings have wide applicability in high-charge pump-probe experiments, metrology, and accelerator science.
PHYSICAL REVIEW RESEARCH
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Max Koeppel, Jasper Podschus, Nicolas Y. Joly, Philip St J. Russell, Bernhard Schmauss
Summary: This study focuses on the accurate tracking of optically levitated microparticles inside hollow-core photonic crystal fibers and demonstrates a significantly improved tracking accuracy for accelerated particles by applying a Kalman filter.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
