Is LEP Coherent Laser Light?

The blue laser is fully converted by a phosphor material into broadband white light.
The emitted light is non-coherent white light, similar to LED emission.

The light source used in many tactical long-range lights, stage lamps, and defence systems is based on Laser Excited Phosphor (LEP) technology. Inside the sealed light engine, a blue laser diode is used only as an excitation source. The blue laser light is directed onto a phosphor material (phosphor ceramic or coating).

When the phosphor is excited by the blue laser, it emits broadband visible light through a photoluminescence process. During this conversion process, the coherent properties of the original laser light are lost.

The light emitted from the phosphor is therefore broad-spectrum, non-coherent white light, similar to light produced by LEDs or other phosphor-converted lighting technologies.

Optical design

  • Transmissive design

  • Reflective design

Key Points

• The laser exists only inside the sealed light engine as an excitation source.

• The emitted light from the front of the device is non-coherent white light, not a direct laser beam.

• The narrow beam appearance is caused by the optical system and small source size, not by coherent laser emission.

• LEP technology is widely used in high-intensity flashlights, projection systems, and searchlights.

Spectrum

  • Normalized Spectrum

    LEP has passed the IEC-60825 CLASS 1 safety test.

    Please take precautions to not hit anyone in the eye whenever you use them.