A novel tunable multi-wavelength fiber ring laser based on semiconductor optical amplifier (SOA) is proposed by using a high-birefringence (Hi-Bi) fiber loop mirror (FLM) as wavelength filter. With this configuration, the wavelength spacing of this laser
使用六镜环形腔的YAG倍频稳频激光器,在输入功率为2 kW时获得500 mW的单频倍频光,频率稳定性优于10 MHz,功率波动小于7％。
针对深度相机受环境光干扰大而导致立木深度图获取困难的问题,提出一种基于小运动短视频图像的立木深度图生成算法。该算法对分割后获取的亚像素角点进行跟踪和匹配,利用光束法平差估计相机参数;利用平面扫描法对图像序列进行密集立体匹配、去噪得到立木深度图。使用智能手机采集1～2s小运动的立木短视频图像验证所提算法的有效性,生成的立木深度图在主观效果上有显著提升。在深度图像数据库NYU depth v2上进行验
Endometrial cancer; cylindrical diffuser; photoacoustic imaging
卷云光学厚度是对全球气候、地球辐射收支影响较大的云光学参数之一。在军事、大气科学等领域对卷云光学参数的求解算法有广泛的应用需求。应用中分辨率成像光谱仪（MODIS）数据求解卷云参数的算法，多采用卫星多通道数据，数据处理过程较为复杂。为解决这一问题，利用RT3模型结合MODIS云参数，模拟计算卷云反射率，建立卷云光学厚度查找表，设计简单算法，实现了卷云光学厚度的有效反演。对比卷云光学厚度反演结果和MODIS实际测得的数据，可得两者相关性达到0.97，验证了此算法下卷云光学厚度反演的可靠性。选取MODIS不同
In this paper a novel low power online chromatic dispersion (CD) monitoring method is presented, which employs spectral shift in the semiconductor optical amplifier (SOA). The advantage of this method lies in that the required input power can be much redu
The piezoelectric film electro-deposition for optical fiber sensor with ZnO coating is studied. The zinc oxide plating film is made on the copper surface directly by cathodic electro-deposition in the Zn(NO3)2 single salt aqueous solution systems. The inf
采用碟形宇宙算法提升电路板红外图像的增强效果。建立碟形宇宙拓扑结构以及宇宙间信息流过程,利用多宇宙之间的信息流移民策略,使各个宇宙链路之间进行双向移民。通过自适应非完全Beta函数实现对电路板红外图像不同灰度段的增强,利用电路板红外图像增强质量评价函数作为碟形宇宙算法的适应度函数,并给出了算法流程。仿真结果显示碟形宇宙算法对电路板红外图像增强结果较好,增强后的图像清晰,其检测性能分析表明图像信息二
Limited by the precision of optical machining and assembling, the optical axes of lasers in an array cannot be strictly parallel to each other, which will result in the beam quality degradation of the combined beam. The tolerance on tilt error for coheren