The 940nm laser is an infrared laser invisible to the naked eye, and a faint red light can be seen in the camera. But the energy is very strong. We shine a laser on the cardboard and it catches fire immediately. 20W is very high power laser, you need to wear IR laser protective glasses when operating, and do not use the laser to irradiate human eyes at any time. In addition, the red STOP button is used for emergency stop, and it is not needed under normal circumstances.

1. CivilLaser's 940nm 20W High power
Semiconductor Laser System
This is 940nm 20W IR Laser Source. The laser head has a heat dissipation base, which can
effectively extend the continuous working time of the laser. The radiator has two cooling fans.
The back of the laser head and the power supply, the 3 working modes of the laser,
CW/TTL/Analog areset from the back of the power supply.
To adjust the working current, turn the 'Adjustor' knob clockwise,when the current exceeds the
minimum working current,the Laser indicator turns green, and there is laser output at this time.
'Adjustor' rotates clockwise to the end, which is the max working current and the maximum
output power of the laser.
Youtube: https://youtu.be/XQuCLThE-6o
The 940nm laser is an infrared laser invisible to the naked eye, and a faint red light can be seen in
the camera. But the energy is very strong. We shine a laser on the cardboard and it catches fire
immediately. 20W is very high power laser, you need to wear IR laser protective glasses when
operating, and do not use the laser to irradiate human eyes at any time. In addition, the red STOP

2. button is used for emergency stop, and it is not needed under normal circumstances.
[Specifications]
Product Name: 940nm Semiconductor laser
Output Wavelength: 940nm±5nm
Spatial Mode: Multi-mode
Output Power: 20W
Operating Mode: CW or Modulation
Beam Diameter(1/e²): Near 5*8 mm
Beam Divergence (Full Angle): Near 3 mrad
Beam Height: Near 39mm
Power Stability: <±3% per 4 hrs
Temperature Stabilizing: TEC
Warm Up Time: <5 minutes
Laser Head dimension: Near 211(L)*151(W)*50.5(H)mm³ (Click here find detail)
Power Supply: Split type power supply / LabAdjustable power supply (Choose)
Power Supply-1: Split Power Supply (Choose) (Click here find detail)
Power Supply-2: LabAdjustable Power Supply (Choose) (Click here find detail)
Laser Radiator/Heat Sink: Not Include/Include (Choose) (Click here find detail)
Modulation: 0~30KHz Analog or TTL
Warranty: 1 Year