Fundamentally, a laser diode module incorporates a laser diode, one or more lenses, and drive electronics, packaged in a laser module housing. Laser modules support a broad range of applications—from alignment visual guidance and 3D printing curing to 3D measurement.
This blog post will discuss laser module lifetime, the factors that affect lifetime, and what manufacturers can do to maximize lifetime and minimize downtime.
Laser Diodes and Modules
A laser diode is a laser where the active medium is a semiconductor device. A laser diode is a specific type of light-emitting diode and its lifespan can be many years. In practice, two key factors determine a laser module’s lifespan: its application usage and inherent design features.
In certain applications, choosing a laser module with a low-cost laser diode—even one with a shorter projected lifespan—makes commercial sense. This is true when the module is easily replaceable with minimal downtime, the operating environment is undemanding, or it will not be driven to maximum rated output power.
Laser Module Lifetime
With use, the efficiency of the laser diode will decrease. For a given current, the optical output of the laser diode will reduce but, in many cases, if the pin configuration of the laser diode is suitable and the laser diode package includes a monitor photodiode, the laser module will incorporate a driver that compensates for that. The laser diode itself will become less efficient but the driver will provide it with sufficient current to maintain the optical output. This is known as automatic power control.
Laser Power
BU-LASER produces laser modules with power levels up to 100W. Lasers at the higher end of this power range require excellent thermal management to maintain lifetime and performance.
There are many aspects of the laser module that determine laser module power. The design of laser drive electronics enables higher laser power. The capability of the laser diode is an important factor. Thermal management ensures that heat generated is conducted away from the laser diode and is critical in high-power lasers.
How to make laser modules last longer
Good thermal management is critical to maximizing laser life.Effective thermal management dissipates heat from the laser diode, thus maximizing its service life. Pulsing the laser module can also extend the in-service life of the laser module.
Conclusion
There are many factors that affect laser module lifetime including the laser diode selected, drive electronics, thermal management, and environmental conditions.
BU-LASER is a leading designer and manufacturer of Laser Diodes, Laser Modules, Fiber Coupled Laser diode moudle, fiber coupled laser array Systems. Contact us for free expert advice on selecting the optimal solution for your system.
BU-LASER laser module range includes laser modules by beam shape, including crosshair lasers, line lasers, and dot laser modules. Contact us for free expert advice on selecting the optimal solution for your system.
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