Wi-Fi is not always practical, such as in hospitals or laboratories where. Wi-Fi is disabled and wired connections can be cumbersome. Therefore, engineers at Taipei University of Science and Technology have designed and manufactured such a low-cost, easy-to-implement optical device to transmit data using traditional laser pointer, which is twice as fast as USB 2.0.
The device uses red and green laser pointer, which cost only $ 600 in total. They changed the power of the green laser pointer from a battery to a power source, making it switch faster-500 million times per second, and the two pointers could emit 1 billion times per second at a 30-foot distance with bit errors The rate does not exceed one in one billion. This makes it easy to establish data connections in laboratories, hospitals, or other places where wireless signals are susceptible to interference from other devices. But atmospheric interference also makes this technology infeasible for long distances outdoors. For point-to-point data exchange. this $ 600 device is still very useful.