A blue diode laser emits light with a wavelength typically between 400 and 500 nanometers (nm). This range falls within the visible spectrum, and is perceived by the human eye as blue or violet light.
Wavelength Range Breakdown:
- Lower End (Around 400 nm): The light appears more violet.
- Mid-Range (Around 450-475 nm): Produces a true blue color, common in Blu-ray players and laser pointers.
- Upper End (Approaching 500 nm): The light tends towards a cyan or blue-green color.
Applications and Common Wavelengths:
| Application | Typical Wavelength (nm) | Notes |
|---|---|---|
| Blu-ray Disc Players | 405 | Uses a shorter wavelength for higher data density. |
| Laser Pointers | 445-450 | Often uses direct diode technology for brighter and more efficient output. |
| Laser Projectors | 445-465 | Allows for a broader color gamut when combined with red and green lasers. |
| Medical and Scientific Applications | Varies | Can be tailored to specific needs, utilizing different wavelengths within the blue spectrum. |
Factors Affecting Wavelength:
The exact wavelength of a blue diode laser depends on the specific semiconductor material and manufacturing process used in its construction. Different materials and techniques allow for slight variations within the 400-500 nm range.
