A MOPA laser stands for “Master Oscillator Power Amplifier” laser. Let me explain how it works step by step:
- Master oscillator: First, a high-quality laser beam is created using a master oscillator. This laser beam has low power, but high quality and stability.
- Amplifier: Next, this laser beam is sent to an amplifier. Here, the power of the beam is increased by using a material that amplifies it. This can be a crystal or a gas.
- Frequency conversion: When the laser beam is amplified to the desired power, it can go through a frequency conversion process. This means that the wavelength of the laser beam is changed to a different wavelength. This is useful in a variety of applications, such as creating laser light with different colors.
- Output beam: Finally, the MOPA laser outputs the amplified, frequency-converted laser beam with high power and high quality. This beam can be used for a variety of purposes, such as cutting, welding, marking, or drilling materials.
In summary, a MOPA laser uses a master oscillator to create a high-quality laser beam that is then amplified in an amplifier and can be changed in wavelength before it is output as a powerful laser beam.