Laser diode modules integrate a laser diode with optics, driver circuitry, and often thermal management into a compact package for reliable beam output.
Key Components:
- Laser Diode: Semiconductor source (e.g., 405nm, 635nm, 780nm, 808nm, 980nm, 1064nm).
- Optics: Collimating lens or aspheric lens for beam shaping.
- Driver Circuit: Constant current source with protection (ESD, reverse polarity).
- Heat Sink / TEC: For thermal stability in high-power modules.
- Housing: Metal or plastic enclosure with mounting options.
Types:
| Type |
Wavelength |
Output Power |
Applications |
| Red (650–670 nm) |
650–670 nm |
1–100 mW |
Pointers, alignment, sensors |
| IR (780–980 nm) |
780–980 nm |
10–500 mW |
Pumping, industrial |
| Blue/Violet (405–450 nm) |
405–450 nm |
5–300 mW |
Fluorescence, engraving |
| High-Power Fiber-Coupled |
808/980 nm |
1–10 W |
Laser pumping, medical |
Selection Tips:
- Match wavelength to application (e.g., 405nm for fluorescence).
- Ensure proper heatsinking for >100mW operation.
- Use constant-current drivers; avoid voltage sources.
- Observe ESD precautions during handling.
- Include safety interlocks and labeling per IEC 60825.
Note: Always use appropriate laser safety goggles and comply with local regulations.