What is a common application for vertical-cavity surface-emitting lasers (VCSELs)?

Vertical-cavity surface-emitting lasers (VCSELs) are primarily valued for their efficiency and the ability to emit light in a narrow, controlled beam, making them particularly suitable for data communication applications. One of the most significant advantages of VCSELs is their capability to operate at high speeds, which is essential for transmitting data over optical fibers, especially in local area networks (LANs) and data centers. They enable high-bandwidth connections with minimal power consumption and heat generation.

Additionally, due to their surface-emitting design, VCSELs can be easily integrated into various optical systems, making them highly versatile for applications in data transmission. Their ability to be fabricated in large arrays also enhances their utility in communication systems by allowing multiple channels of light to be transmitted simultaneously. This versatility and efficiency is what primarily underscores their common use in the realm of data communication.