The first advantage of laser communication is its large capacity. What is its capacity? When we usually talk on the phone, the words we talk about are sometimes inconsequential. This type of battle is due to a pair of telephone lines that can only go through one way. If another line arrives, two normal parties will be disrupted. If 10 couples are using a pair of phone lines at the same time, that means 20 people can talk at the same time, so they can't talk at all. Red: and red-orange laser Pointers: These are simpler Pointers because laser diodes are available at these wavelengths. The pointer is nothing more than a battery-powered laser diode. The first red laser Pointers, released in the early 1980s, were large, bulky devices that cost hundreds of dollars. Today, they are much smaller and often cost very little. In the 21st century, 671 nm solid-state diode pumped (DPSS) red laser designators became available. While this wavelength can be obtained directly with a cheap laser diode, better beam quality and narrower spectral bandwidth can be obtained with the SSAD version.
As laser diode technology matures, the 515nm green laser pointer can provide high performance demonstrations in the workplace. The technology is based on high-performance diode lasers that provide the best beam quality and modulation performance. The 515nm Green diode laser designator is made from a highly stable green diode laser that continuously provides the most efficient demonstration. In practice, high intensity laser beams can also be emitted.