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大功率半导体激光器阵列的封装技术 总被引:3,自引:0,他引:3
半导体激光器阵列的应用已基本覆盖了整个光电子领域,成为当今光电子科学的重要技术。本文介绍了半导体激光器阵列的发展及其应用。着重阐述了半导体激光器阵列的封装技术——热沉材料的选择及其结构优化、热沉与半导体激光器阵列之间的焊接技术、半导体激光器阵列的冷却技术、与光纤的耦合技术等。 相似文献
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半导体二极管阵列激光器是高效、小型、全固态源.本文论述高功率二极管阵列激光器的性能和关键技术,并给出了它最新的进展和未来的应用. 相似文献
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高功率半导体激光器技术发展与研究 总被引:1,自引:0,他引:1
高功率半导体激光器及阵列具有可用激光波长丰富、电光转换效率高、调制特性好等许多优点,特别是作为固体激光器和光纤激光器的高效率泵浦源而获得的全固态紧凑型激光器,持续受到极大的关注,得到快速发展.近年来在高功率阵列半导体激光器模块化技术、超高效率、高效冷却技术、半导体激光器及阵列的光束质量优化、高效电源驱动技术等方面都取得了长足的进步,促进了其广泛应用.将结合高功率半导体激光国家重点实验室的研究工作,概述近年来国内外半导体激光器技术的研究进展状况和发展趋势. 相似文献
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随着激光二极管在干涉测量、固体激光、光存储等领域应用的愈加广泛,其LD输出波与温度之间的准确控制难度逐渐突显,人们尝试通过半导体激光器温度控制系统对此问题进行改善,在此背景下,本文针对半导体激光器温度智能控制系统设计问题展开研究. 相似文献
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本文给出了光电反馈半导体激光器(LD)的相位噪声,指出:光电反馈可显著改善半导体激光器的相位噪声性能。 相似文献
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Lasing characteristics for a 1.3 ?m InGaAsP/InP distributed-feedback double-channel planar buried-heterostructure laser diode (DFB-DC-PBH LD) have been remarkably improved by antireflection (AR) coating applied on the front facet. CW single-longitudinal-mode (SLM) operation power as high as 55 mW, and differential quantum efficiency as high as 36%, have been obtained from the coated front facet. CW SLM operation has been achieved up to 105°C. 相似文献
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A newly developed buried heterostructure on p-type InP substrate was successfully applied to the fabrication of a 1.3 ?m DFB laser diode (LD). Stable CW SLM operation up to 31 mW at 30°C for an LD structure with two as-cleaved facets, and 53 mW at 25°C utilising AR coating, have been achieved. 相似文献
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Wollaston棱镜宽带减反射膜的研制及测试 总被引:4,自引:4,他引:0
针对Wollaston棱镜中o、e光对应的基底折射率相差较大以及制作该晶体的冰洲石和许多薄膜材料间附着力较差的特点,为了提高镀膜材料和冰洲石基底的附着力以及提高棱镜的透过比,拓宽有效使用带宽,借助于计算机辅助设计方法,设计了高性能多层减反射膜系。选用合适的光学薄膜材料,利用电子束蒸镀,借助于离子源辅助蒸镀,制作了高性能的宽带减反射膜。测试结果表明:o光的平均剩余反射率小于1.0%,e光的平均剩余反射率小于0.5%,有效使用带宽在近红外大于200nm;薄膜和基底结合牢固,达到了设计要求,提升了棱镜的品质。 相似文献
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Xin‐Xiang Zhang Shuang Cai Dan You Liang‐Hong Yan Hai‐Bing Lv Xiao‐Dong Yuan Bo Jiang 《Advanced functional materials》2013,23(35):4361-4365
A double‐layer double‐wavelength antireflective (AR) coating with 100% transmittance at both 1064 nm and 532 nm, which is very important in high power laser systems, is designed using thin film design software (TFCalc). The refractive indices for the bottom and top layers of the designed AR coating are about 1.30 and 1.14. A simple, template‐free sol‐gel route is proposed to prepare the superhydrophobic ORMOSIL (organically modified silicate) thin film, which has an ultralow refractive index, by silica particle surface modification using hexamethylisilazane (HMDS); this treatment decreases the refractive index of the silica thin film from 1.23 to 1.13. The formation mechanism of the ultralow refractive index thin film is proposed. The particle surface modification with HMDS significantly improves the hydrophobicity of the coated film; the water contact angle of the film increases from 23.4° to 160°. The bottom layer, which has a refractive index of 1.30, is prepared from acid‐catalyzed and base‐catalyzed mixed silica sol. A double‐layer silica AR coating is obtained with transmittances of 99.6% and 99.8% at 532 nm and 1064 nm, respectively. 相似文献
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基于反射光谱的单层抗反射膜的非在位膜厚精确控制 总被引:1,自引:1,他引:0
提出一种基于反射光谱分析的非在位膜厚控制技术,首先利用椭圆偏振光谱仪确定波长300~1 700 nm范围内的薄膜折射率,由此确定对应于特定波长(如1 550 nm)的最佳抗反射(AR)镀膜沉积条件。然后计算最佳AR镀膜厚度所对应的反射谱,得到相应的CIE标准色谱坐标。通过对比实测镀膜颜色和计算得到的最佳颜色,可以实现小尺寸器件端面上AR镀膜厚度的优化控制。利用这一方法,由等离子体增强化学气相沉积(PECVD)制备的SiNx单层AR镀膜,获得了4.4×10-4的反射率。 相似文献
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Spectral investigation of multimode fiber Bragg grating based external-cavity semiconductor lasers 总被引:1,自引:0,他引:1
Hong-Gang Yu Yong Wang Chang-Qing Xu Wojcik J. Mascher P. 《Quantum Electronics, IEEE Journal of》2005,41(12):1492-1501
The output spectra of external-cavity semiconductor lasers (ECSLs) formed by using different antireflection (AR) coated laser diodes (LDs) with multimode fiber Bragg gratings (MMFBGs), are studied systematically. It is found that the side mode suppression ratio (SMSR) of the output spectra of ECSL is dependent on the relative position of the Bragg wavelength and the intracavity modes of the LD, and this effect is more apparent when the reflectivity of AR coating of LD is increased. Numerical simulations are provided to explain the experimental observations. Furthermore, the requirements of wavelength locking of ECSLs with MMFBGs are found to be different from those with single-mode fiber Bragg gratings (SMFBGs). The conditions of wavelength locking of the MMFBG-based ECSLs in terms of gain margin between the material gain peak and the gain corresponding to the selected Bragg wavelength, reflectivity of AR coating of LD and reflectivities of the Bragg wavelengths of MMFBG are comprehensively investigated, and compared with the experimental results. 相似文献
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MeasurementoftheResidualModalReflectivityofARCoatingonaSLD¥MADongge;SHIJiawei;LIUMingda;JINEnsun;GAODingsan(JinnUniversity,Ch... 相似文献
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溶胶-凝胶多孔二氧化硅减反膜稳定性研究 总被引:7,自引:4,他引:3
多孔SiO2膜层经热处理后,具有很高的激光破坏阈值,但是结构中有许多Si-OH亲水基团,导致光学透过率受环境相对湿度的影响很大。实验目的是改善膜层内部结构,使膜层结构中的亲水基团转变为疏水基团。提高膜层的疏水性,增强膜层的透过率稳定性。系统地研究了膜层透过率随时间变化的规律,在氨气和六甲基二硅氮烷(HMDS)混合气氛下热处理膜层,处理后生成Si-O-Si(CH2)3非极性疏水基团,使膜层的疏水性大大提高,因而膜层的透过率稳定性有大幅度提高。稳定性的提高延长了膜层的寿命。处理后膜层的表面粗糙度良好,均方根表面粗糙度(RMS)为3.575,平均粗糙度(RA)为2.850,能够满足大型激光器精密化发展的要求。 相似文献