The laser module is the light source inside a laser light. You can think of it as the bulb inside a lamp, and the same principle applies. The laser module contains various laser diodes z and optical components/crystals, with the laser diodes serving as the light source that emits light when powered.

The earliest laser modules used gas laser tubes filled with specific gases (such as argon, mixed gases, or helium-neon gas), which were excited by high power to generate a laser beam. This technology later evolved into DPSS (Diode-Pumped Solid-State) lasers. DPSS lasers use high-power infrared light sources and focus them onto specific crystals (such as Nd:YAG) to generate laser beams of different wavelengths. In recent years, diode laser technology has become the standard for laser modules in laser shows. This technology generates laser light by controlling the current of the laser diodes, and its reliability and long lifespan have made it a common type of laser module in the laser show industry.

Internal structure diagram of a diode laser module
Professional laser modules adopt a fully enclosed design to ensure that no substances that could damage the laser diodes or optical components enter the interior.

As shown in the figure above, the main components inside the laser module include the laser diodes and various optical components used to generate the laser beam.

Among these, the component named LASORB is referred to as an ‘electrostatic discharge absorber,’ the world’s first electronic component designed to protect laser diodes from direct and indirect electrostatic discharge (ESD) damage. It safeguards laser diodes, photodiodes, and LED devices from single, multiple, and repetitive positive or negative electrostatic discharges. ESD and surges are one of the primary causes of premature laser failure. LASORB ensures that your laser modules and laser diodes are not harmed by these factors.

Another commonly used laser light source in high-end laser lights is OPSL technology. OPSL is an optically pumped semiconductor laser, a patented technology by Coherent, which outperforms other continuous-wave (CW) solid-state lasers in terms of reliability and lifespan. Additionally, OPSL laser modules are characterised by extremely low beam divergence, meaning the laser beam is more focused and appears brighter. These laser modules are typically used in high-end laser lights for large outdoor events and stadium-sized performances.