What is a MOPA Laser?
A MOPA Laser, or a Master Oscillator Power Amplifier, is one of the most innovative, flexible, and advanced systems that you can find. The efficient MOPA design has two gas discharge chambers: the power amplifier and the master oscillator. The master oscillator creates light with low energy in a tight spectrum. After this action, the light is passed through the second chamber, or the power amplifier, which strengthens the light to reach the necessary power levels. As a fiber laser, it uses less energy and takes up less space than other lasers, as well as provides higher quality markings, engravings, and etchings.
Advantages of the MOPA Laser
While using short pulses and lower pulse energy, it heats the materials less, and the area of a heat affected zone is shortened, resulting in many advantages for marking metals and plastics such as:
Less foaming with plastics.
Creation of reproducible annealing colors on stainless steel.odized aluminum when making name tags and signage.
Less burning and melting on the edges of metal engravings.
Less heat during annealing marking on metal, which creates better corrosion behaviorg.
Other advantages include:
100,000 diode hours (longer useful life)
Can engrave annealing colors
Flexible controls and easy to use
Highest beam quality
Easy to integrate with your current operations
Will not be vulnerable to misalignment and adjustment problems (found in YAG lasers)
Provides durability of the mark after reprocessing
Compatible with other software such as Photoshop, CorelDraw, Auto CAS, etc.
Materials that this Machine can Engrave:
The MOPA laser’s software allows it to have a pulse frequency with more amplitude than the fiber, from 1 to 2700 kHz. This ensures that the machine has different and a larger variety of engraving results over plastics and metals in comparison to a Q-switched or fiber laser. The different materials that the MOPA laser can engrave over are as follows:
- Stainless Steel
- Precious Metals
- Carbon Steel
- Silicon Plastic
- ABS Plastic
- PC Plastic
- PBT Plastic and more!
Why MOPA Over Other Lasers?
A MOPA laser gets its power from using multiple single emitter diodes, meaning that the flow of current is in one direction only, and the diodes couple the output to the laser. While this technology is fairly new to the laser industry, it ensures that the laser (if running normal work day hours/6 days a week) would not show any degradation within 100,000 hours. In contrast, other lasers in the industry (CO2 and YAG) use diode stacks or bars that have limited life due to temperature fluctuations and cooling requirements resulting in quicker degradation.
Typically, marking lasers generate pulses to complete their mark. Unfortunately, that pulse duration is non-adjustable making precision and the length of the application to be completed variable. What sets a MOPA laser apart from the typical marking laser is that its pulse duration is entirely adjustable from long or short pulses from 4 to 200 ns. These pulse durations, frequencies, and energy can be adjusted independently of one another, resulting in flexibility and speed during the application.
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