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- 实验方案
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L-Band Efficient Dissipative Soliton Erbium-Doped Fiber Laser with a Pulse Energy of 6.15 nJ and 3 dB Bandwidth of 47.8 nm
摘要： Here, an efficient dissipative soliton mode-locked fiber laser in the L-band using nonlinear polarization rotation technology is demonstrated. With a maximum pump power of 495.3 mW and polarization state optimization, the fiber laser delivers a maximum output power of 68.6 mW with an 11.16 MHz repetition rate and a corresponding single pulse energy of 6.15 nJ. The dissipative soliton spectrum is centered at 1599.6 nm with a 3 dB bandwidth of 47.8 nm. The full width at half maximum of the compressed pulse is 156 fs. To the best of our knowledge, this is the highest single pulse energy reported so far for an L-band passively mode-locked all-fiber laser.
关键词： mode-locked fiber laser,Erbium-doped fiber,dissipative soliton,L-band
更新于2025-11-28 14:24:03
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Self-generating Brillouin fiber laser using highly nonlinear hafnium bismuth erbium-doped fiber
摘要： A compact Brillouin fiber laser (BFL) utilizing a newly developed hafnium bismuth erbium-doped fiber (HB-EDF), which functions as both the Brillouin and linear gain media, is realized in the absence of Brillouin pump. It is achieved by the self-Brillouin generation from a 0.2 m length of HB-EDF with high nonlinearity in a laser cavity. The self-generating BFL was obtained in both ring and linear laser cavities. Compared to the ring cavity, the BFL in the linear cavity produced more Brillouin stokes at a lower pump threshold. In the experiment, an eight-line comb with average spacing of 0.087 nm was generated at the HB-EDF pump power of 75.27 mW. This compact BFL has total cavity length of less than 0.5 m, and thus, this is the shortest gain medium reported.
关键词： hafnium bismuth erbium-doped fiber,self-generating Brillouin fiber laser,stimulated Brillouin scattering
更新于2025-11-28 14:23:57
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Tunable self-excited multiwavelength Brillouin-erbium fiber laser based on a variable temperature sensor
摘要： We propose and demonstrate a tunable self-excited multiwavelength Brillouin-erbium fiber laser based on a novel in-line Mach–Zehnder interferometer sensor (NMZIS) with variable temperature. The configuration of the NMZIS is a section of uncoated single-mode fiber sandwiched between an up-taper and multimode fiber. With the temperature changing from 30 °C to 90 °C, the transmission spectrum of the NMZIS shifts towards longer wavelengths. By embedding the NMZIS to act as a fiber filter in the ring cavity, the wavelength of the output multiwavelength comb is tuned from 1552.35 to 1564.48 nm. The corresponding generation of 21 Brillouin–Stokes lines with 25 dB optical signal-to-noise ratio is achieved.
关键词： Brillouin-erbium fibre laser (BEFL),tunable,self-excited
更新于2025-11-28 14:23:57
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Supercontinuum generation of highly nonlinear fibers pumped by $1.57$-${\rm{\mu }}{\rm{m}}$ laser soliton
摘要： Highly nonlinear ?bers (HNLFs) are crucial components for supercontinuum (SC) generation with laser solution. However, it is dif?cult to exactly estimate the structure of produced SC according to material parameters. To give a guideline for choosing and using HNLFs for erbium-?ber-based optical applications, we demonstrate SC generation in ?ve types of HNLFs pumped by 1.57-μm laser solitons. All ?ve ?bers output a SC exceeding 1000 nm. Three different SC formation processes were observed in the experiment. By comparing optical parameters of these ?bers, we ?nd the zero dispersion wavelength (ZDW) of ?ber has an important in?uence on the SC structure and energy distribution for a given pump source.
关键词： highly nonlinear ?ber,erbium-?ber laser,supercontinuum generation
更新于2025-11-28 14:23:57
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Luminescent Electrochromic Devices for Smart Windows of Energy-Efficient Buildings
摘要： To address the challenges of the next generation of smart windows for energy-efficient buildings, new electrochromic devices (ECDs) are introduced. These include indium molybdenum oxide (IMO), a conducting oxide transparent in the near-infrared (NIR) region, and a NIR-emitting electrolyte. The novel electrolytes are based on a sol-gel-derived di-urethane cross-linked siloxane-based host structure, including short chains of poly (ε-caprolactone) (PCL(530) (where 530 represents the average molecular weight in g mol?1). This hybrid framework was doped with a combination of either, lithium triflate (LiTrif) and erbium triflate (ErTrif3), or LiTrif and bisaquatris (thenoyltri?uoroacetonate) erbium (III) ([Er(tta)3(H2O)2]). The ECD@LiTrif-[Er(tta)3(H2O)2] device presents a typical Er3+ NIR emission around 1550 nm. The ?gures of merit of these devices are high cycling stability, good reversibility, and unusually high coloration ef?ciency (CE = ?OD/?Q, where Q is the inserted/de-inserted charge density). CE values of ?8824/+6569 cm2 C?1 and ?8243/+5200 cm2 C?1 were achieved at 555 nm on the 400th cycle, for ECD@LiTrif-ErTrif3 and ECD@LiTrif-[Er(tta)3(H2O)2], respectively.
关键词： erbium β-diketonate complex,poly(ε-caprolatone)/siloxane hybrids,erbium triflate,lithium triflate,NIR-transparent IMO,sol–gel,zero-energy buildings,electrochromic devices
更新于2025-09-23 15:23:52
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Comparative analysis of capacity oriented Integrated AMI modulation technique for the deployment of radio over fiber system
摘要： To improve the spectral efficiency and to reduce non-linear distortion in the optical system, various advanced modulation techniques have been investigated for radio over fiber (RoF) system. The investigation indicates the high data rate distortion less transmission for long-haul RoF system still further investigation is required to improve spectral efficiency and to get the reduction in signal degradation. In this paper, an advanced modulation technique referred as integrated alternate mark inversion modulation technique based upon external modulation (electro-absorption modulator) has been designed and simulated. The results show better performance in terms of performance metrics i.e. Q-factor (25.15) and BER (4e-140) and also enhance the data transmission capabilities up to 100 Gbps covering the long distance of 250 km resulting a reasonable reduction in signal degradation particularly chromatic dispersion effects for long-haul transmissions.
关键词： Single mode fiber—SMF,Carrier suppressed return to zero—CSRZ,Erbium doped fiber amplifier—EDFA,RoF,Dispersion compensating fiber—DCF,Multi-mode fiber—MMF
更新于2025-09-23 15:23:52
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Polariton superregular breathers in a resonant erbium-doped fiber
摘要： We study polariton superregular (SR) breathers triggered by the resonant interaction of an optical field with two-level doping ions in an erbium-doped fiber. We demonstrate explicitly that the optical wave component always features a bright structure that describes the modulation instability (MI) development from localized small perturbations, while the SR matter-wave breathers exhibit more complicated dynamical evolution, which are absent in standard scalar SR breather theory. Despite the complexity, the exact link between these SR breathers and MI is established strictly by showing that the absolute difference of group velocities of SR breathers coincides exactly with the linear MI growth rate. In particular, we show how a small dip perturbation of the dark SR breather in the matter wave component induces an intriguing MI process of completely exponential decay. These results will enrich our understanding on the MI development in complex coupled light-matter interaction systems.
关键词： erbium-doped fiber,polariton,resonant interaction,modulation instability,superregular breathers
更新于2025-09-23 15:23:52
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Single-mode large-mode-area Er–Yb fibers with core based on phosphorosilicate glass highly doped with fluorine
摘要： Single-mode Er–Yb fibers with the core based on a phosphorosilicate glass matrix (up to 6.5 mol.% P2O5) highly doped with fluorine (up to 0.9 wt.%) were fabricated using an all-gas-phase modified chemical vapor deposition method. The core numerical aperture was in the range of 0.07–0.08 relative to the pure silica, which allowed us to increase the single-mode core diameter up to 20 μm. The slope efficiency in lasers based on the fabricated fibers reached 34% relative to the launched pump power.
关键词： fiber lasers,optical fibers,erbium–ytterbium fibers,erbium-doped fiber amplifiers
更新于2025-09-23 15:22:29
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Simultaneously achieving a large negative dispersion and a high birefringence over Er and Tm dual gain bands in a square lattice photonic crystal fiber
摘要： We proposed a novel photonic crystal fiber composed of a double-cladding square lattice that could be used in dual-band, Er and Tm optical gain bands, simultaneously supporting a large negative dispersion and a high birefringence. We theoretically investigated the light guiding property through the proposed PCF by using a vectorial finite element method (FEM) with a perfectly matched layer (PML). By optimizing the structural parameters, we obtained an ultra-large negative dispersion of -20,186ps/(nm?km) and a very high birefringence of 9.27 ×10-3 at the wavelength of 1.55μm in the Er gain band and a very large negative dispersion of -8,067ps/(nm?km) and a high birefringence of 1.0 ×10-3 at the wavelength of 1.87μm in the Tm band. We further discussed the roles of waveguide parameters on the chromatic dispersion, its slope, and the birefringence of the fiber as well as the mode field diameter. The proposed fiber could be directly applied for dual-band dispersion and polarization control in fiber laser cavities as well as optical communications and sensors in the dual bands.
关键词： Thulium band,Erbium band,Negative dispersion,High birefringence,Photonic crystal fiber
更新于2025-09-23 15:22:29
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Láser erbium vaginal como tratamiento del síndrome genitourinario de la menopausia: resultados preliminares
摘要： Antecedentes: El síndrome genitourinario de la menopausia (SGM) afecta hasta el 50% de las mujeres posmenopáusicas. Sus síntomas presentan un curso crónico y progresivo, pudiendo alterar significativamente la sexualidad y la calidad de vida. Objetivo: Evaluar efectividad a corto plazo y aceptabilidad del láser vaginal de Erbium en cristal de itrio-aluminio-granate (Er:YAG) como una terapia fototérmica no invasiva, no ablativa para el manejo del SGM. Método: Estudio longitudinal prospectivo, realizado en 28 mujeres posmenopáusicas con SGM. Se aplica láser vaginal Er:YAG en 3 sesiones cada 30 días. En todos los controles, se evalúa sequedad vaginal, dispareunia mediante escala visual analógica, y se registra el “vaginal health index score” (VHIS). Al final del tratamiento se evalúa la aceptabilidad del método. Resultados: Se observa mejoría significativa de los síntomas (sequedad vaginal y dispareunia; p<0,01) durante todo el periodo de estudio y del VHIS (8,2 ± 1,3 previo al tratamiento vs. 19,2 ± 0,4 posterior al tratamiento; p<0,01). El 93,4% de las pacientes calificó el procedimiento como excelente o bueno. Conclusión: Nuestro estudio piloto muestra que el tratamiento con láser Er:YAG en mujeres posmenopáusicas con síntomas de SGM es eficaz, factible y seguro en el corto plazo. Se requieren datos a más largo plazo y de mayor tama?o muestral para confirmar nuestros resultados.
关键词： atrofia vulvovaginal,láser Erbium,Menopausia,síndrome genitourinario de la menopausia,estrógenos
更新于2025-09-23 15:22:29