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Low threshold random lasing in dye-doped and strongly disordered chiral liquid crystals Random lasing was experimentally investigated in pyrromethene 597-doped strongly disordered chiral liquid crystals (CLCs) composed of the nematic liquid crystal SLC1717 and the chiral agent CB15....

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Whispering-gallery mode lasing from polymer microsphere for humidity sensing WGM lasing with low threshold and high Q factors was realized in an individual microsphere under femtosecond laser pumping. The slight change of environmental relative humidity (RH) can be monitored ...

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Lasing action in microdroplets modulated by interfacial molecular forces Liquid droplets offer a great number of opportunities in biochemical and physical research studies in which droplet-based microlasers have come into play over the past decade. While the recent ...

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Bistable lasing in parity-time symmetric coupled fiber rings We propose a parity-time (PT) symmetric fiber laser composed of two coupled ring cavities with gains and losses, which operates both in PT-symmetric and symmetry-broken regimes depending on the static...

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High-order mode lasing in all-FMF laser cavities We experimentally demonstrate two kinds of all few-mode fiber (FMF) ring lasers with high-order mode (HOM) oscillation in the laser cavity. One kind is a switchable-wavelength all-FMF HOM laser with ...

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Electrically pumped random lasing from hydrothermal ZnO films of large grains Then, metal-insulator-semiconductor (MIS) structured devices based on such ZnO films have been fabricated in order to achieve low-threshold electrically pumped random lasing (RL). It is found that ...

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Random lasing in strongly disordered medium such as thinfilm disordered media and planar waveguides, the larger the difference of the refractive indices between the scattering and background media, the smaller the lasing threshold. We also ...

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Ultraviolet Lasing Characteristics of ZnS Microbelt Lasers Investigation on the room-temperature ultraviolet lasing characteristics of a single ZnS microbelt laser is presented. Lasing emission with peak wavelength at round 335 nm is observed from the ...

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Variable-curvature microresonators for dual-wavelength lasing In this paper, the mode characteristics of a variable curvature microresonator are investigated by a two-dimensional finite element method for realizing stable dual-mode lasing. The microresonator ...

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Parasitic lasing in large aperture Ti:sapphire chirped pulse amplifier We research some properties of parasitic lasing (PL) in the Ti:sapphire chirped pulse amplifier with the crystal diameter of 100 mm. The evolutionary process from the spontaneous emission to the PL ...

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Mode selection and high-quality upconversion lasing from perovskite CsPb However, upconversion lasing by two-photon excitation with mode selection and high quality factor in one device is still rarely reported. Herein, two lasing modes are demonstrated in the all-...

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Lasing characteristics of strongly pumped Yb-doped photonic crystal fiber laser The lasing characteristics of an improved Fabry-Perot (F-P) cavity fiber laser using LMA-PCF are studied theoretically based on a rate equation model and the exact numerical solution of the rate ...

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Science advances-breather lasing.pdf 华东师范大学精密光谱科学与技术国家重点实验室曾和平教授课题组在超快激光领域取得重要进展，该团队首次实现了一种被称之为“呼吸子”的超快激光脉冲。研究成果“Breathing dissipativesolitons in mode-locked ...

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Unidirectional lasing in semiconductor microring lasers at an exceptional point [Invited] Slight deviations from the EP condition can break preferential unidirectional lasing near threshold via a Hopf instability. However, above a “second” laser threshold, unidirectional emission is res

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Threshold gain behavior of lasing modes in two-dimensional active random media The pumping rate dependence of the peak intensity of the individual lasing mode in two-dimensional (2D) active random media is investigated. The results show that these modes have a typical threshold ...

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Single-mode lasing via loss engineering in fiber-taper-coupled polymer bottle microresonators Due to the lack of mode selection capability, single whispering-gallery-mode (WGM) lasing is a challenge to achieve. In bottle microresonators, the highly nondegenerated WGMs are spatially well-...

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Ultrafast gain dynamics in N^+_2 lasing from highly excited vibrational states pumped by circularly ... We experimentally demonstrate N^+_2 lasing actions at the wavelengths of 353.3, 353.8, and 354.9 nm using a circularly polarized femtosecond laser. The three laser lines correspond to the B2Σ+u(v'=5,...

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Lasing with and without inversion due to spontaneously generated coherence in an open V-type system It is shown that in an open V-type atomic system without incoherent pumping, the spontaneously generated coherence (SGC) can not only lead to lasing with inversion but also lead to lasing without ...

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Superior single-mode lasing in a self-assembly CsPbX All-inorganic perovskite micro/nanolasers are emerging as a class of miniaturized coherent photonic sources for many potential applications, such as optical communication, computing, and imaging, ...

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Self-adjustment of a nonlinear lasing mode to a pumped area in a two-dimensional microcavity ... We demonstrate the appearance of an asymmetric lasing mode whose spatial pattern violates both the x- and y-axes mirror symmetries of the cavity. Dynamical simulations revealed that a lasing mode ...

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Effect of vacuum-induced coherence on lasing without inversion in an equispaced three-level ladder ... The effects of vacuum-induced coherence (VIC) on the ... It is found that lasing without inversion (LWI) is remarkably enhanced due to the effect of VIC in the case of the small incoherent pump rate.

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Direct single-mode lasing in polymer microbottle resonators through surface destruction We demonstrate an effective approach of mode suppression by simply using a tungsten probe to destroy the external neck surface of polymer microbottle resonators. The higher-order bottle modes with ...

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Variation of Lasing Wavelength of Fiber Grating Semiconductor Laser with Temperature for Different ... For different external cavity lengths, lasing wavelength variation of fiber grating external cavity semiconductor laser (FGECSL) with ambient temperature has been investigated theoretically, and the ...

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low threshold lasing action in an asymmetric double ZnO/ZnMgO quantum well structure low threshold lasing action in an asymmetric double ZnO/ZnMgO quantum well structure

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Spectroscopic and lasing characteristics of 1,3,5,7-tetramethyl-8-ethyl-pyrromethene-BF2 complex Its lasing characteristics were measured on a dye laser system pumped by a continuous wave Ar ion laser. The results suggest that, compared with the typical pyrromethene-BF2 dye such as P-546, ...

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Universal single-mode lasing in fully chaotic two-dimensional microcavity lasers under continuous-... For a fully chaotic two-dimensional (2D) microcavity laser, we present a theory that guarantees both the existence of a stable single-mode lasing state and the nonexistence of a stable multimode ...

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Lasing Characteristics of CH3NH3PbCl3 Single-Crystal Microcavities under Multiphoton Excitation Lasing Characteristics of CH3NH3PbCl3 Single-Crystal Microcavities under Multiphoton Excitation

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Spectra and lasing properties of Er3+, Yb3+:phosphate glasses The effects of Al2O3, Yb2O3, Er2O3 and OH- on spectral properties of P2O5.Na2O.SrO.Al2O3.Yb2O3.Er2O3 erbium phosphate glass were studied. 5, 8, and 13 mol% Al2O3, 4, 5, 6, 7 and 8 mol% Yb2O3 and 0.05,...

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H-shaped Oligofluorenes for Highly Air-stable and Low-threshold Non-doped Deep Blue lasing H-shaped Oligofluorenes for Highly Air-stable and Low-threshold Non-doped Deep Blue lasing

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Manipulable and Hybridized, Ultralow-Threshold Lasing in a Plasmonic Laser Using Elliptical InGaN/... Manipulable and Hybridized, Ultralow-Threshold Lasing in a Plasmonic Laser Using Elliptical InGaN/GaN Nanorods

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Fabrication and Lasing Property of Yb3+-doped Double-Clad Fibers with Novel Inner Cladding The Yb3+-doped double-clad fibers with novel inner cladding have been made by using MCVD process, solution-doping method and optical machining together, higher than 1.8W and 50% respectively.

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Lasing characteristics of Yb-doped gadolinium yttrium mixed oxyorthosilicate Yb:(Gd0.1Y0.9)(2)SiO5 Lasing characteristics of Yb-doped gadolinium yttrium mixed oxyorthosilicate Yb:(Gd0.1Y0.9)(2)SiO5

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High-Q, low-mode-volume microsphere-integrated Fabry–Perot cavity for optofluidic lasing ... We develop a hybrid optofluidic microcavity by placing a microsphere with a diameter ranging from 1 to 4 μm in liquid-filled plano-plano Fabry–Perot (FP) cavities, which can provide an extremely low...

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A new similar to 1 mu m laser crystal Nd:Gd2SrAl2O7: growth, thermal, spectral and lasing properties A new similar to 1 mu m laser crystal Nd:Gd2SrAl2O7: growth, thermal, spectral and lasing properties

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Random lasing with high quality factor over whole visible range based on cascade energy transfer 基于能量转移输出光覆盖可见光波段的高品质因数随机激光器，史晓玉，王艳容，基于混合染料中不同染料分子间的能量转移，本文在实验上实现了由单一波长泵浦的覆盖可见光波段的低阈值随机激光器。...

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Integration of nanoscale light emitters: an efficient ultraviolet and blue random lasing from NaYF4:... Near infrared light-controlled release of payloads from ultraviolet-sensitive (UV-sensitive) polymer hydrogels or nanocarriers is one of the most promising strategies for biotherapy....

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Dual-mode lasing in a 1310-nm quantum dot distribu Dual-mode lasing in a 1310-nm quantum dot distributed feedback laser induced by single-beam optical injection

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Dispersion effects on performance of free-electron laser based on laser wakefield accelerator In this study, we investigate a new simple scheme using a planar undulator (PU) together with a properly dispersed electron beam ($e$ beam) with a large energy spread ($｛\sim｝1\%$) to enhance the ...

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Dual-wavelength single-longitudinal-mode fiber laser with switchable wavelength spacing based on a ... By virtue of the excellent saturable absorption ability of graphene, the linewidths of the lasing wavelengths can be effectively reduced and eventually SLM operation can be obtained. The linewidths ...

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EDFA仿真代码.zip Can also be used to calculate single-pass gain of lasers and thus predict the pump power necessary for lasing. (i.e. when the gain G_th is greater than the cavity losses L and output T: G_th = 1/((1-T...

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一种新型聚合物激光染料报道了一种新型聚合物染料的受激发射特性。

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InAs / GaAs量子点激光光谱中的高强度单模峰我们报告了InAs / GaAs量子点激光器的异常激光光谱，其中存在一个单模峰，其光强度比其他模式大几倍。在413 mA的注入电流下，在29∘C下测得的单模峰值的最大侧模抑制比为10.11 dB。发现该异常激光光谱的出现发生在...

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Low-temperature characteristics of two-color InAs/InP quantum dots laser We report on the lasing characteristics of a two-color InAs/InP quantum dots (QDs) laser at a low temperature. Two lasing peaks with a tunable gap are simultaneously observed. At a low temperature of ...

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V型三能级系统中Raman过程诱导的无反转激光研究了封闭的V型三能级激光系统。该系统利用外加双色泵浦场通过Raman过程耦合两个高能级来建立原子相干,激光跃迁发生在-个高能级与低能级之间,结果表明该系统可以建立裸态无反转激光,其增益来源于缀饰态原子相干。

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Testifying experiment of the multi-pulse phenomena of capillary discharge soft-X-ray laser In a capillary discharge experiment for the neon-like argon lasing, we have proposed an experimental scheme to verify that the multi-spike of X-ray diode (XRD) signal is a multi-pulse laser or is a ...

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Nonlinear dynamics study of an open resonant Λ-type system A way resulting in lasing without inversion (LWI) in an open resonant Λ-type system from a nonlinear dynamics viewpoint is investigated. The destabilization of the non-lasing solution can occur not ...

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基于回波的高次谐波自由电子激光器简介 2012年5月，《Nature Photonics》上首次刊登了一篇中国加速器物理学家发表的文章，文章的题目是《First lasing of an echo-enable harmonic generation free-electron laser》。同期附上了对该文第一作者，中国科学...

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Passively Q-switched S-band thulium fluoride fiberlaser with multi-walled carbon nanotube The proposed TFFL has a central lasing wavelength of 1486.4 nm and an input power range of 87.1–126.6 mW. The output pulses have a repetition rate and pulse width range of 30.1–40.0 kHz and 9.0–...

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Temperature-controlled mode selection of Er-doped random fiber laser with disordered Bragg gratings In this paper, we proposed a way to realize an Er-doped random fiber laser (RFL) with a disordered fiber Bragg grating (FBG) array, as well as to control the lasing mode of the RFL by heating specific...

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稳态无粒子数反转亚泊松激光的量子理论在理论上研究了相干、非相干泵浦的常规三能级激光器的稳态和噪声行为，指出:在相干、非相干泵浦率与激光下能级自发辐射率可以比拟的激光非优化区(激活原子基态耗尽区)，相干、非相干泵浦常规三能级激光器的输出光场...

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