On the front panel, the "Laser Diode Control" block has five buttons (see Figure 2. In CP mode a photodiode is required to sense the optical intensity. The block diagram in Figure 1 shows a very basic laser diode driver (or sometimes known as a laser diode power supply). Unlike LED light, a laser's light output is more concentrated, meaning it has a smaller and more narrow viewing angle. It is widely used in applications requiring precise and focused light beams.
[PDF Version]