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	High power diode laser with beam coupling (EI CONFERENCE) 会议论文 OAI收割 Optoelectronic Materials and Devices III, October 27, 2008 - October 30, 2008, Hangzhou, China 作者: Wang L.; Liu Y.; Wang L.; Liu Y.; Liu Y. 收藏 \| 浏览/下载：61/0 \| 提交时间：2013/03/25 As the increasing applications of the semiconductor lasers in the laser processing the single 2-D stack optic-power density has not satisfied the actual requirements. It demands to couple several diode laser stack beams to one to improve the brightness and it becomes the central issue to adopt the appropriate beam coupling technology which would offer high quality and high efficiency. In this paper it mainly introduces the beam shaping and the technology of spatial coupling polarization coupling and wavelength coupling. The coupling key elements are presented and indicated. Finally the development of the diode laser on beam coupling in our country fell behind through analyzing the statement of the world. Our lab is studying on polarization coupling and wavelength coupling. We gain some results by phase which the polarization coupling efficiency can achieve 90% for two LD stacks with seven bars whose luminous wavelength is 975nm and980nm.By two 808nm diode laser coupling the efficiency of 60% can be achieved after focusing to the beam size of 22mm2. 2008 SPIE.
	Study on chromaticity balance for LED exposure system (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2007 - Laser, Ultraviolet, and Terahertz Technology, September 9, 2007 - September 12, 2007, Beijing, China 作者: Meng Z.; Meng Z. 收藏 \| 浏览/下载：17/0 \| 提交时间：2013/03/25 A standard white light compounding algorithm based on combination of CCD illumination acquisition with computer control is presented for LEDs. The computer adjust and control the working current of LEDs by using three-color LEDs illumination acquired by CCD camera achieved chromaticity coordinates error between compounded white light and standard white light D65 less than the threshold beforehand setted by this technique then acquiring needed standard white light. Compounded white light meet the chromaticity error demand that is able to be changed at the same time the CCD illumination acquisition system is eliminated. The proposed algorithm improved the light energy utilization efficiency of LED and eliminated the offset of central wavelength and chromaticity coordinates due to work current change of LEDs. Experimental results show that the proposed algorithm achieved lesser chromaticity error uv=0.001 relative to standard white light D65 enhanced chromaticity uniformity of illumination field.
	Study on chroma balance based on grating spectrometer for LED (EI CONFERENCE) 会议论文 OAI收割 Light-Emitting Diode Materials and Devices II, November 12, 2007 - November 14, 2007, Beijing, China 作者: Meng Z.; Meng Z. 收藏 \| 浏览/下载：23/0 \| 提交时间：2013/03/25 A standard white light compounding algorithm based on combination of choma coordinates acquisition system with computer working current control system is presented for three-color LED. The chroma coordinates acquisition system consist of grating spectrometer and integrating sphere. The computer adjust and control the working current of three-color LED then achieved chroma coordinates error between the compounded white light and standard white light D65 until the chroma coordinates is less than the threshold beforehand set by this technique. The compounded white light meet the chroma error demanded that is able to be changed at the same time the chroma coordinates acquisition system and the working current control system are eliminated. The proposed algorithm the offset of central wavelength and the change of chroma coordinates due to working current variety for LEDs. Experimental results show that the proposed algorithm achieved lesser chroma error uv=0.001 relative to standard white light D65 enhanced chroma uniformity of illumination field.
	Fabrication of arrayed waveguide grating based on soi material 期刊论文 iSwitch采集 Journal of infrared and millimeter waves, 2005, 卷号: 24, 期号: 2, 页码: 143-146 作者: Fang, Q; Li, F; Liu, YL 收藏 \| 浏览/下载：34/0 \| 提交时间：2019/05/12 Multiplexer/demultiplexer Arrayed waveguide grating ( awg) Channel spacing Central wavelength Adjacent channel crosstalk
	High power output and temperature characteristics of 1.06m diode array module (EI CONFERENCE) 会议论文 OAI收割 ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China 作者: Yao S.; Wang L.; Wang L.; Wang L.; Liu Y. 收藏 \| 浏览/下载：61/0 \| 提交时间：2013/03/25 In this paper high power diode array module with an emission wavelength of 1.06m is presented. The epitaxial structure is an InGaAs/GaAsP strained-compensated single-quantum well structure. Laser bars with a fill factor of 50% arc processed and show a good temperature characteristics with a slope efficiency only decreasing from 1.08W/A to 1.06W/A when the temperature of heat sink changes from 20C to 40C. The module's CW output power can reach to 68.5W at a current of 80A when the temperature of cooling water is 20C. The central wavelength is 1059.4nm.
	All fiber ytterbium-doped fiber grating laser (EI CONFERENCE) 会议论文 OAI收割 High-Power Lasers and Applications III, November 8, 2004 - November 11, 2004, Beijing, China 作者: Zhang L.; Wang L.; Wang L. 收藏 \| 浏览/下载：22/0 \| 提交时间：2013/03/25 Based on requirement of all fiber structure all fiber Yb-doped fiber grating laser uses double cladding fiber with Yb-doped as gain medium uses fiber grating as resonance cavity and employs semiconductor laser as pumping source to realize the lasing based on the reverse of Yb ion. We use Bragg fiber grating as the resonance cavity of fiber laser and 970nm LD as pumping source pump the Yb-doped double cladding fiber with circular inner-cladding. We realized 7.5 W single-mode laser output central wavelength of 1080nm FWHM of 0.11 nm under the pump power of 11.8W. Maxim conversion efficiency is 63.5 % and slope efficiency of 46.4%.
	Numerical simulation and experiment of novel semiconductor/superlattice distributed Bragg reflectors (EI CONFERENCE) 会议论文 OAI收割 Optical Transmission, Switching, and Subsystems III, November 7, 2005 - November 10, 2005, Shanghai, China 作者: Zhao Y.; Zhao Y.; Zhao Y.; Wang X.; Wang X. 收藏 \| 浏览/下载：17/0 \| 提交时间：2013/03/25 We introduced a novel semiconductor/superlattice AlAs/(GaAs/AlAs) distributed Bragg reflector (DBR) and the reflection spectrum of the DBR at 980nm wavelength is simulated by employing transfer matrix method. By adjusting the thickness of AlAs layer and the period of superlattice GaAs/AlAs the DBR with center wavelength at 1500nm is also investigated theoretically. In experiment this kind of DBR is grown on GaAs (100) substrate. From the measured reflection spectrum the central wavelength is about 980 nm with high reflectivity.