Why we use Vertical Cavity Surface Emitting Lasers?
时间: 2024-05-27 14:12:42 浏览: 17
Vertical Cavity Surface Emitting Lasers are often used because they have a low threshold current, are easy to manufacture in large quantities, and have a circular, low divergence beam pattern which makes them more suitable for certain optical applications than traditional edge-emitting lasers.
相关问题
The difference between surface and edge emitting LED.
Surface emitting LEDs are also known as vertical cavity surface emitting lasers (VCSELs). They emit light perpendicular to the surface of the semiconductor wafer. Edge emitting LEDs, on the other hand, emit light from the edges of the wafer, parallel to its surface. The main advantages of surface emitting LEDs are their higher efficiency, lower power consumption, and ability to be fabricated in large numbers on a single wafer. Edge emitting LEDs, however, are generally more powerful and can be used for applications that require higher output power, such as fiber optic communications.
cavity convolution
空洞卷积(Cavity Convolution)是一种在卷积神经网络中常用的操作,也被称为空洞卷积或扩张卷积(Dilated Convolution)。与传统的卷积操作相比,空洞卷积通过在卷积核中插入一些额外的间隔来增加感受野(receptive field),从而捕获更广泛的上下文信息。
在空洞卷积中,卷积核的元素之间插入了一些空洞,这些空洞可以通过调整空洞的间隔大小来控制感受野的大小。较大的间隔可以扩大感受野并提供更广泛的上下文信息,但同时也降低了特征图的分辨率。
空洞卷积在许多计算机视觉任务中被广泛应用,如语义分割、目标检测和图像生成等。通过增加卷积层的感受野,空洞卷积可以提供更多的上下文信息,从而改善模型在这些任务上的性能。它被广泛应用于许多深度学习模型中,如DeepLab、ASPP(Atrous Spatial Pyramid Pooling)等。
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