Laser Printer Laser Diode. A laser diode is also called an injection laser diode. Their are kw level drivers available in pulsed and qcw mode versions.

Since optical fibres need a highly directed beam, optical fibre communication often requires a laser beam for signal transmission. A low power driver is roughly defined as 1 ma to 5 amps. Laser diodes need complex drive circuits which use feedback loops to measure temperature, input current, o/p optical power & voltage.