where q is laser energy density, the unit is J/mm2, W is laser power, H is laser spot diameter, and v is scanning speed. Laser energy density plays a decisive role in SLS forming, and its size is related to laser power, scanning speed, and scanning spacing [27]. To obtain the sui...
As such, peak fluence is normally used in laser ablation studies. For a Gaussian beam, the peak fluence, Fpeak, is defined as follows: (3)Fpeak=2ELπωr2 where ωr is the radius from the beam axis where the optical intensity drops to 1/e2 (≈13.5%) of the value on the beam ...
激射阈值为μJ/mm2量级的罗丹明B掺杂微盘腔激光器大幅度降低系统热效应和染料的光漂白效应. 将该器件应用于BSA的非特异性检测时, 其原理示意图和SEM照片如图8(b)所示, 响应范围能从1 ag/mL至100 ng/mL; 对于人体免疫球蛋白G(IgG)的特异性检测在10 ng/mL下达到相对饱和[148]. 在分析物与光子分子...
Laser interference lithography is an attractive method for the fabrication of a large-area two-dimensional planar scale grating, which can be employed as a scale for multi-axis optical encoders or a diffractive optical element in many types of optical sensors. Especially, optical configurations such...
On the other hand, Al alloys provide value in applications requiring light-weighting and corrosion resistance1,2 Dissimilar joints between steel and Al alloys are vital, particularly in transport industries aiming to reduce overall weight without compromising safety. Nevertheless, challenges have arisen ...
The melt depth increases almost linearly with the laser fluence and reaches a value of about 200 nm for 2−3 J/cm2. To our knowledge there are no available experimental data for our laser fluences, in the proximity of 100 J/cm2. However, analytical models that consider ...
Due to a meniscus shape of the droplet, in the central part where the laser beam was focused, the local thickness is about twice larger than the average value. On diesel droplets, we studied the LIBS signal behavior as a function of the rotation speed at two different laser ener- gies, ...
Consequently, the supply of the pulse current and pre-bias current to the in-use laser LD1 is cut off and the composite value of the lasers LD1 and LD2 is obtained at an optical coupler CPL.FUJIWARA HARUOTAKAHASHI MASAAKIYOSOGI MAMORU...
laser power has been mostly used as a controlling parameter to cause change into the system online. If the melt pool width changes from the predefined value, laser power is automatically varied (increased or decreased) to control the size of melt pool. This gives rise to consistency in mechani...
The experimental value of optical gain with a maximum gain coefficient is 2.8 × 10−3cm−1. In a similar direction, Le and Weaver accomplished the requirement for space deployment from the first atomic iodine solar-pumped gas laser [33]. The proposed system is pumped by simulated solar ...