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Lesson 7 Laser Transmitter
Introduction
Laser is widely used in medical treatment, military, and other fields due to its good directivity
and energy concentration. The Laser Transmitter module (as shown below), as the name
suggests, is a one that can emit laser.
Components
-
1 * SunFounder Uno board
- 1 * USB data cable
- 1 * Laser transmitter module
- Several jumper wires
Experimental Principle
A laser is a device that emits light through a process of optical amplification based on the
stimulated emission of electromagnetic radiation. Lasers differ from other sources of light
because they emit light coherently.
Spatial coherence allows a laser to be focused to a tight spot, enabling applications like
laser cutting and lithography, and a laser beam to stay narrow over long distances
(collimation), enabling applications such as laser pointer. Lasers can also have high temporal
coherence which allows them to have a very narrow spectrum, i.e., they only emit a single
color of light. And its temporal coherence can be used to produce pulses of light—as short
as a femtosecond.
SunFounder
