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Session Index

Quantum Electronics

Poster Session 3
Friday, Dec. 5, 2014  11:00-12:10
Room: F22
11:00 - 12:00 Paper No.  2014-Fri-P0303-P001
Bao-Jen Shih Diffraction efficiency spectral behavior of PQ-PMMA VBG under different writing conditions
Bao-Jen Shih,Yu-Hua Hsieh,Te-Yuan Chung,

The diffraction efficiency spectrum of PQ-PMMA volume Bragg grating (VBG) depends on the absorption coefficient and refractive index modulation of PQ-PMMA. The peak diffraction efficiency can shift more than 0.2 nm from the intended written wavelength.

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11:00 - 12:00 Paper No.  2014-Fri-P0303-P002
Chen Chuan Wen A tunable dual single longitudinal modes laser using two transmission PQ-PMMA VBGs
ChenChuan Wen,

A tunable dual single longitudinal modes laser is built using two homemade PQ-PMMA volume Bragg gratings (VBG) as the wavelength selecting and spectral narrowing elements. The laser can achieve the wavelength tunning range more than 10 nm without damage the PQ-PMMA VBGs.

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11:00 - 12:00 Paper No.  2014-Fri-P0303-P003
Yao-Cheng Tien Theories of an Effective Single Quantum Dot Implemented by Electrostatically-Gated Asymmetric Coupled Quantum Wells
Yao-Cheng Tien,Neil Na,

We present the modeling of dipolar exciton ground state in AlGaAs asymmetric coupled quantum wells in an external electric field induced two-dimensional electrostatic trap. It is shown that a stable spontaneous emission can be obtained where its radiative lifetime approaches 50 ps.

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11:00 - 12:00 Paper No.  2014-Fri-P0303-P004
Cheng-Yeh Kuo Passive mode-locking of a diode-pumped Nd:GdVO4 laser based on cascaded second-order nonlinearity
Po-Chun Liu,Cheng-Yeh Kuo,Shou-Tai Lin,

A continuous-wave mode-locking laser system via positive cascaded second-order Kerr lens (CSKL) at 1063 nm was demonstrated. An average power of 3.49 W is obtained under 19.5 W diode power at 808 nm. The pulse repetition rate, and the pulse duration are 175.44 MHz, and 18 ps, respectively.

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11:00 - 12:00 Paper No.  2014-Fri-P0303-P005
Hung Lin Quantum Transport Simulation by Considering Phonon Scattering in Semiconductor Devices
Hung Lin,Yuh-Renn Wu,

In this paper, a simulation program using Non- Equilibrium Greens function formalism with electron-phonon (acoustic and polar optical phonon) is developed for studying carrier transport with energy relaxation. The result shows thatthe carrier energy of the current density would be broadened after applying the scattering. The result suggests that a proper scattering consideration should be considered in most quantum transport model.

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11:00 - 12:00 Paper No.  2014-Fri-P0303-P006
H.P. Chung Theoretical and Experimental Characterization of Finite-Beam Bragg Diffraction in PPLN Electro-Optic Grating
H.P. Chung,J. W. Chang,W. K. Chang,Y.H. Chen,

We report the study of the finite-beam Bragg diffraction behavior of an electro-optic volume grating made of a PPLN crystal. The experimental observations show that the diffraction mode pattern and diffraction efficiency of the PPLN EO Bragg device are closely related to the interaction beam size and applied voltage.

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11:00 - 12:00 Paper No.  2014-Fri-P0303-P007
YEN HUNG Wang Antiphase dynamics in a bipolarized Nd:YAG laser with pump modulation
YEN HUNG Wang,Kun Guei Hong,Ming Dar Wei,

When the interaction of orthogonally polarised modes with the active medium occurs, the low-frequency relaxation oscillation for antiphase mode will be generated. This work demonstrates the dynamics corresponding to pump modulation frequency approaching to this low frequency. The relationship of average frequency of chaotic signal between in-phase and anti-phase oscillation were studied.

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11:00 - 12:00 Paper No.  2014-Fri-P0303-P008
Yu-Chen Cheng Modeling of Multiple Plate Continuum Generation
Yu-Chen Cheng,Yuan-Yao Lin,Chih-Hsuan Lu,A. H. Kung,

We used the nonlinear Schrödinger equation to model the process of continuum generation using multiple thin plates. The result is compared with experiments done with an 800 nm femtosecond laser pulse.

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17:15 - 17:45 Paper No.  2014-Fri-P0303-P009
Ta-Wei PENG The Nonlinear Optics of Graphene Saturable Absorber Measured by Z-scan Technique
Ta-Wei PENG,Wan-Lin Chen,Pi Ling Huang,Chao-Yung Yeh,Wood-Hi Cheng,

Graphene thin-films were prepared by CVD method with different layers and measured by Z-scan technique. Results showed that nonlinear absorption was due to saturation of single photon absorption. Under the intensity of 21.3 GW/cm2, 1- and 8-layer graphene showed the nonlinear absorption coefficient α(I) of 1.342 and 0.043 (10^8 m-1).

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17:15 - 17:45 Paper No.  2014-Fri-P0303-P010
Ting-Yuan Chang GaN-based photonic quasi-crystal surface-emitting lasers
Ting-Yuan Chang,Kuo-Bin Hong,Chih-Cheng Chen,Tien-Chang Lu,

In this study, GaN-based photonic quasi-crystal surface emitting lasers (PQCSELs) were fabricated and analyzed. The device for Γ5 mode exhibited the lowest threshold pumping energy density of 4.6 mJ/cm2. The tendency of calculated gains was consistent with the experiment results. We concluded that the PQCSEL had the opportunity to acquire lower threshold energy density than conventional PCSEL if it operated at special band-edge mode.

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17:15 - 17:45 Paper No.  2014-Fri-P0303-P011
Yung-Hsiang Lin SPM and GVD Managed Erbium-doped Fiber Laser Mode-Locked by Graphene Nano-Sheet
Yung-Hsiang Lin,Chun-Yu Yang,Gong-Ru Lin,

Self-phase modulation (SPM) and group delay dispersion (GDD) managed erbium-doped fiber laser (EDFL) mode-locked with few-layer graphene nano-sheet is demonstrated to optimize the soliton compression at a negative GDD region.

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17:15 - 17:45 Paper No.  2014-Fri-P0303-P012
Shih-Shian Lin Ytterbium-Doped Fiber Ring Laser in Forward and Backward Pumping Configurations
Shih-Shian Lin,Shih-Ting Lin,Yao-Wun Jhang,Jia-Ming Liu,

The characteristic difference between forward- and backward-pumped ytterbium-doped fiber laser is investigated. In the forward pumping scheme, the over-pumping power can be reused in the next cycle to enhance the gain in the fiber cavity. Therefore, higher output power and slope can be obtained.

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17:15 - 17:45 Paper No.  2014-Fri-P0303-P013
Sheng-Wen Huang High-power Femtosecond Pulse Generation in a Chirped-Pulse Amplified Ytterbium-Doped Fiber Laser System
Sheng-Wen Huang,Yue-Ying Li,Yi-Jing You,Chih-Hsuan Lin,Alexey Zaytsev,Chi-Luen Wang,Ci-Ling Pan,

In this paper, we demonstrated the chirped pulse amplification (CPA) of a high-power ytterbium-doped fiber amplifier at wavelength of 1064 nm without a stretcher. The all-normal dispersion (ANDi) passively mode-locked fiber laser is used to generate highly chirped seed pulse. Further, the compressed-pulse was frequency doubled by a type-I critically phase-matched (CPM) Lithium Triborate (LBO) crystal. With 370 mW of fundamental light, we can generate 88 mW of green output (λ= 532 nm) with conversion efficiency of 23%.

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17:15 - 17:45 Paper No.  2014-Fri-P0303-P014
Chih-Hsien Cheng SixC1-x saturable absorber mode-locked fiber lasers with varying C/Si composition ratio
Chih-Hsien Cheng,Gong-Ru Lin,

The silicon carbide saturable absorbers with varying C/Si composition ratios are employed to passively mode-lock the fiber laser for compressing the pulsewidth from 400 fs to 360 fs with a time-bandwidth product of 0.317 when varying the SixC1-x from the stoichiometric to C-rich condition.

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17:15 - 17:45 Paper No.  2014-Fri-P0303-P015
Chun-Ping Lin Optical nonlinear properties of Gold-Nanoparticle Films investigated by Z–scan
Chun-Ping Lin,Ming-Chan Shieh,Tsong-Ru Tsai,Shih-Chieh Hung,Shien-Der Tzeng,

We used Z-scan without aperture technique to measurement the nonlinear optical absorption properties of gold-nanoparticle films. We use sample is 3-Mercaptopropionic acid (MPA). Those gold-nanoparticle films was comprised by diameter 12nm with two layers(MPA1) and three layers(MPA2). And those samples’ UV-Visible absorption characteristics show in Figure. Then we studied those samples at off-resonant wavelengths and the result of fitting data are showing in table . Our laser light source is mode-locked femtosecond Ti:sapphier laser(790nm,120fs).

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Paper No.  2014-Fri-P0303-P016
Sheng-Jhu Wang Nonlinear Optical Properties of Fused Silica
Sheng-Jhu Wang,Ben-Jhe Lin,Tsong-Ru Tsai,

We reported that spectrally-resolved two-beam coupling [1] using a mode-locked Ti:sapphire laser produces reliable measurements of the nonlinear responses of fused silica. The nonlinear index of refraction of fused silica n_2=3.18×〖10〗^(-20) m2/W. Figures 1, 2 show experiment results on fused-silica at 780 and 800nm, respectively.

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