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	1. All-fiber passively wavelength precise tunable graphene Q-switched erbium-doped ring laser
	Zhang Shumin,Han Mengmeng
	Physics 26 December 2013
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	Abstract:An all fiber, wavelength tunable, Q-switched erbium-doped fiber laser (EDFL) based on a graphene saturable absorber (SA) has been demonstrated. The wavelengths of the Q-switched laser can be accurately tuned over a range of ~35 nm by inserting into the cavity an unbalanced Mach-Zehnder interferometer (UMZI) with a variable optical delay line (OVDL) in one arm, which acts as an optical beam filter into the cavity. The Q-switched pulse duration and the pulse energy have all been characterized. A maximum pulse energy of 36.9 nJ was obtained.
	TO cite this article:Zhang Shumin,Han Mengmeng. All-fiber passively wavelength precise tunable graphene Q-switched erbium-doped ring laser[OL].[26 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4576646


	2. Femtosecond laser induced breakdown in fused silica by linearly, circularly, and elliptically polarized lasers
	LI Cong,LI Xin,YUAN Yanpng,Zhang Kaihu,SHI Xuesong,Zhang Ning
	Physics 18 December 2013
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	Abstract:The plasma model, which has been widely used to predict the femtosecond laser induced breakdown in fused silica, is improved to make it applicable by linearly, circularly, and elliptically polarized lasers in this study. The free electron generation, optical properties of ionized material, the spatial and temporal distribution of reshaped laser beams closely depend on the laser polarization. In addition, the cross sections of multiphoton ionization by polarized lasers are fitted as a polynomial function based on an extension of Keldysh theory, and simulated results are in good agreements with experimental results.
	TO cite this article:LI Cong,LI Xin,YUAN Yanpng, et al. Femtosecond laser induced breakdown in fused silica by linearly, circularly, and elliptically polarized lasers[OL].[18 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4576519

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	3. Seeded Spontaneous Parametric Four-Wave Mixing and Fluorescence of Pr3+:YSO
	Zheng huaibin,Li Changbiao,Zhang Yanpeng
	Physics 18 December 2013
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	Abstract:We demonstrate the seeded spontaneous parametric four-wave mixing (SP-FWM) process associating with the fluorescence signals of Pr3+:YSO both theoretically and experimentally. For the first time, the dressed SP-FWM processes are observed by self-dressing and/or external-dressing in this crystal. Various possible amplification processes are discussed by selectively seeding various multi-wave mixing (MWM) signals. Two contributions of the dressing effect and the dipole-dipole interaction to the linewidths of SP-FWM signal and the conjugate signal of the seeding MWM signal associating with fluorescence signal have been distinguished. In addition, the Autler-Townes-like (or Autler-Townes) splitting effect of fluorescence spectrum induced by itself (or external) field and the mutual interaction between two fluorescence signals are investigated which are well explained using the presented theoretical model. Such results can find potential applications in all-optical communication and optical information processing on photonic chip.
	TO cite this article:Zheng huaibin,Li Changbiao,Zhang Yanpeng. Seeded Spontaneous Parametric Four-Wave Mixing and Fluorescence of Pr3+:YSO[OL].[18 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4576498


	4. Highly efficient rectangular pulse emission in a passively mode-locked Yb-doped fiber laser
	Shumin Zhang,Xingliang Li
	Physics 18 December 2013
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	Abstract:Dissipative soliton resonance (DSR) has been experimentally investigated in a nonlinear polarization rotation (NPR) mode-locked Yb-doped fiber laser (YDFL) with a long cavity. The adjustable nonlinear transmission function of the NPR and the relatively large nonlinearity of the long cavity play key roles in the formation of high energy rectangular pulses in the DSR region. The intracavity optical-to-optical efficiency can be as high as 46%, and the maximum pulse energy can reach 54.6 nJ with a relatively low pump power of 299 mW. This is so far the highest efficiency in a DSR laser operated at 1 μm wavelength yet achieved. Furthermore, while maintaining the pulse amplitude almost constant and without the appearance of wave-breaking phenomena, the pulse duration could be tuned from 54 to 91 ns by increasing only the pump power.
	TO cite this article:Shumin Zhang,Xingliang Li. Highly efficient rectangular pulse emission in a passively mode-locked Yb-doped fiber laser[OL].[18 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4576484


	5. All-optically controlled fourth- and sixth-order fluorescence processes of Pr3+:YSO
	Li Changbiao,Zheng huaibin,Zhang Yanpeng
	Physics 16 December 2013
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	Abstract:For the first time, we report all-optically controlled fourth- and sixth-order fluorescence processes with and without splitting, in a heteronuclear-like molecule system of Pr3+:YSO both in theory and experiment. We construct the asymptote among Pr3+ ions localized at different cation vacancies. By changing the frequency detuning and power of the controlling field, fluorescence signal can be controlled to switch from an enhanced peak to a suppressed dip, and vise versa. Such transition has a potential application to produce all-optical switches. The results can be well explained by a theory model based on the high-order coherent process.
	TO cite this article:Li Changbiao,Zheng huaibin,Zhang Yanpeng. All-optically controlled fourth- and sixth-order fluorescence processes of Pr3+:YSO[OL].[16 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4575737


	6. Tighter focus for a radially polarized light beam with suppressed side lobes of longitudinal component using absorbance modulation
	Qiang Li,Xing Zhao,Bo Zhang,Yi Zheng,Liqiu Zhou,Zhiliang Fang
	Physics 09 December 2013
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	Abstract:Recently many methods based on amplitude or phase modulation to reduce the focal spot and enhance the longitudinal ?eld component of a tight-focused radially polarized light beam have been suggested. But they all suffer from spot size limit 0.36λ/NA and large side lobes strength in longitudinal component. Here we report a new method of generating a tighter focused spot by focusing radially polarized and azimuthally polarized beams of different wavelengths on a thin photochromic ?lm through a high-numerical-aperture lens simultaneously. In this method, by suppressing the radial component and compressing the longitudinal component of radially polarized beam, absorbance modulation makes the ultimate spot size break the size limit of 0.36λ/NA with side-lobe intensity of longitudinal component below 1% of central-peak intensity. The theoretical analysis and simulation demonstrate that the focal spot size could be smaller than 0.1λ with nearly all radial component blocked at high intensity ratio of the two illuminating beams.
	TO cite this article:Qiang Li,Xing Zhao,Bo Zhang, et al. Tighter focus for a radially polarized light beam with suppressed side lobes of longitudinal component using absorbance modulation[OL].[ 9 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4574012


	7. The dynamics of the Jaynes-Cummings model with ultra-strong coupling
	Yue Ma,Kun Dong,Guihua Tian
	Physics 04 December 2013
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	Abstract:The adiabatic approximation has applied to the study of Jaynes-Cummings model with ultra- strong coupling, introduced by Irish and Agarwal,et al.(Phys. Rev. B. 72, 195410 (2005) and Phys. Rev. A.85, 043815 (2012)), we extend Agarwal's work to include the interaction between the two qubits. We get the eigenvalues and eigenfunctions of Rabi Hamiltonian. We discuss the time dependence of two qubits considering the interaction between them. Qualitative di?erence between the Agarwal's work and ours are most interesting, and may ˉnd applications in entangled state: under ultra-strong coupling and large defuning condition, the two qubits coupled to a quantum oscillator will show the tendency of preserving their entanglement by the increase of interaction strength between two qubits.
	TO cite this article:Yue Ma,Kun Dong,Guihua Tian. The dynamics of the Jaynes-Cummings model with ultra-strong coupling[OL].[ 4 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4571997


	8. Compressive sensing ghost imaging via inverse scale space method
	Hua Yichen,Xin Yu,Zhang Mingming,Chen Yanru,Zhao Qi
	Physics 28 November 2013
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	Abstract:For ghost imaging (GI), pursuing high resolution images and short acquisition times required for reconstructing images are always two main goals. We report an image reconstruction algorithm of compressive sensing (CS) called adaptive inverse scale space (aISS) method to recover ghost images. By AISS method, ghost imaging with a good signal-to-noise ratio and short acquisition times is achieved. The relationship between ghost imaging and compressive sensing is also discussed in this paper.
	TO cite this article:Hua Yichen,Xin Yu,Zhang Mingming, et al. Compressive sensing ghost imaging via inverse scale space method[OL].[28 November 2013] http://en.paper.edu.cn/en_releasepaper/content/4572310


	9. Random lasing with high quality factor over whole visible range based on cascade energy transfer
	Shi Xiaoyu,Wang Yanrong,Wang Zhaona,Sun Yanyan,Wei Sujun,Liu Dahe,Zhou Jing,Shi Jinwei
	Physics 18 November 2013
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	Abstract:On the basis of cascade energy transfer between different dye molecules, single-excitation and low threshold coherent random lasing with a high quality factor (~13000) over the whole visible range was experimentally observed using gold-silver bimetallic porous nanowires with abundant nano-gaps as the scatterers. These nano-gaps with different sizes in the bimetallic nanowires can produce continuous plasmonic resonance spectra and provide strong feedback or gain channels for the stimulated emission from different dye molecules. It guarantees low threshold of lasing. Moreover, multi gain media can provide broad tunability of the emission wavelength when the system is pumped by single-wavelength pulses. It provides excellent flexibility for the design of multi-color output device.
	TO cite this article:Shi Xiaoyu,Wang Yanrong,Wang Zhaona, et al. Random lasing with high quality factor over whole visible range based on cascade energy transfer[OL].[18 November 2013] http://en.paper.edu.cn/en_releasepaper/content/4570654


	10. Asymmetric light transmission in one-dimensionally separation-varied waveguide arrays
	QI Xinyuan,CAO Zheng,LIU Yongqi,LU Yang,DU Yingjie,ZHANG Guoquan,BAI Jintao
	Physics 02 November 2013
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	Abstract:Asymmetric light transmission in one-dimensionally separation-varied waveguide arrays is explored both theoretically and numerically in this paper. The theoretical results show that the value of the transmission contrast of the system is dependent only on the coupling coefficients of two uniform waveguide arrays. Corresponding numerical simulations demonstrate that the number of the layers in the separation varied waveguide part affects the transmission dynamics of the light beam but unrelated to the value of the transmission contrast, which is in good agreement with the theory.
	TO cite this article:QI Xinyuan,CAO Zheng,LIU Yongqi, et al. Asymmetric light transmission in one-dimensionally separation-varied waveguide arrays[J].

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