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	Influence of airborne LiDAR wavelength on the detection distance of clear air turbulence 期刊论文 OAI收割 Optical Engineering, 2023, 卷号: 62, 期号: 11 作者: Zhao, Jing; Luo, Xiujuan; Liu, Zhaohui; Liu, Hui; Chen, Minglai \| 收藏 \| 浏览/下载：17/0 \| 提交时间：2024/01/08 atmospheric turbulence LiDAR scattering optimal wavelength
	Theoretical analysis of emission characteristics of second-order distributed feedback semiconductor lasers (EI CONFERENCE) 会议论文 OAI收割 Semiconductor Lasers and Applications IV, October 18, 2010 - October 19, 2010, Beijing, China 作者: Liu Y.; Liu Y.; Qin L.; Liu Y.; Wang L. 收藏 \| 浏览/下载：28/0 \| 提交时间：2013/03/25 Based on the modified coupled-wave theory the emission characteristics including threshold gain photon density distribution in the cavity and external differential quantum efficiency for second-order DFB lasers are investigated. Numerical simulation results show that for given device structure with wavelength of 1.55 m the feedback coupling coefficient and the surface radiation coupling coefficient of the second-order grating have great influence on the emission characteristics of the device. By choosing different duty cycles of the grating we can change the two coupling coefficients which affect the emission characteristics. For an overall consideration an optimal duty cycle of 0.43 is chosen. The optimized results show that the device works without degeneracy modes and spatial burning hole. Besides the side-mode suppress ratio (SMSR) and external differential quantum efficiency reach as high as 42 dB and 47% respectively. 2010 SPIE.
	Optimization of multi-cycle two-color laser fields for the generation of an isolated attosecond pulse 期刊论文 OAI收割 opt. express, 2008, 卷号: 16, 期号: 14, 页码: 10331, 10340 Kim Byunghoon; Ahn Jungkwen; Yu Yongli; 程亚; 徐至展; Kim Dong Eon 收藏 \| 浏览/下载：1093/55 \| 提交时间：2009/09/18 America Attosecond pulses Full Width Half Maximum (FWHM) FWHM pulse Main color Mixing ratios Multi-cycle Optical (PET) (OPET) Optimal wavelength Pulse duration (PD) Shorter wavelengths Two color laser fields Two-color Two-dimensional (2D) map
	Investigation on the fluorescence spectroscopy of normal and malignant rectum tissues 期刊论文 OAI收割 SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 卷号: 27, 期号: 6, 页码: 1156-1160 作者: Meng Tao; Xu Duan-fu; Xu Yi-zhuang; Zhao Ying; Wang Du-jin \| 收藏 \| 浏览/下载：18/0 \| 提交时间：2019/04/09 Rectal Cancer Optimal Excitation Wavelength Fluorescence Spectra Diagnose
	Low drive-voltage and high-bandwidth electro-optic modulators based on BaTiO3 thin-film waveguides (EI CONFERENCE) 会议论文 OAI收割 Science and Technology of Dielectrics for Active and Passive Photonic Devices - 210th Electrochemical Society Meeting, October 29, 2006 - November 3, 2006, Cancun, Mexico Sun D. G.; Fu X. H.; Liu Z. F.; Ho S. T.; Wessels B. W. 收藏 \| 浏览/下载：45/0 \| 提交时间：2013/03/25 We investigated electro-optic modulator structures to target low drive voltage high-speed modulation and small device size with c-axis grown BaTiO3/MgO ferro-electric thin films. In this study the calculations are focused on the ideal thin film with a quadratic relation between the half-wave drive voltage V and the interaction length L in the electro-optic modulation case we obtained in previous work. With the quadratic electro-optic modulating relation and the optimal rib waveguide structure of BaTiO3/MgO thin films the frequency-voltage-size performances for 2.5GHz 10GHz 40GHz and 100GHz modulation bandwidths have been obtained under half-wave drive voltages of 0.8V 1.6V 3.0V and 4.8V respectively for the ideal film with r51=730 pm/V at 1550nm wavelength where both the phase velocity matching condition and the conductor induced microwave attenuation are considered. The required device lengths to achieve these four typical values of modulation bandwidth are 3.3 mm 0.8 mm 0.4 mm and 0.2 mm respectively. With the c-axis grown BaTiO3/MgO crystal thin films and the quadratic electro-optic modulating relation an electro-optic coefficient of reff=180 pm/V for the c-axis grown BaTiO3/MgO ferro-electric thin films was measured which is relatively far from the ideal value of r51=560 pm/V. copyright The Electrochemical Society.