This 405 nm laser diode is a compact, high-stability violet laser source designed for continuous-wave (CW) operation. Integrated with a monitoring photodiode (PD) and housed in a Ø5.6 mm TO package, it provides precise output control, reliable thermal performance, and consistent optical characteristics, making it well-suited for industrial laser modules and OEM integration.
Key Features
- Wavelength: 405 nm (typical)
- Output Power: 20 mW (typ.), up to 35 mW max
- Low Threshold Current: 26 mA (typ.)
- Integrated Photodiode (PD): Enables real-time power monitoring and feedback control
- Compact TO Package: Ø5.6 mm with excellent mechanical compatibility
- CW Operation: Stable output under continuous-wave conditions
Applications
- Laser Modules – compact and efficient light source integration
- Industrial Systems – inspection, alignment, and processing tools
- Optical Instrumentation – sensing and analytical equipment
- OEM Laser Assemblies – systems requiring monitored optical output
Absolute Maximum Ratings (Tc = 25°C)
| Parameter | Symbol | Rating | Unit |
|---|---|---|---|
| Light Output Power | Po (CW) | 35 | mW |
| Reverse Voltage (LD) | VR | 2 | V |
| Operating Temperature | Topr | 0 to +75 | °C |
| Storage Temperature | Tstg | −40 to +85 | °C |
Tc: Case temperature
Electrical & Optical Characteristics (Tc = 25°C, CW)
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Threshold Current | Ith | CW | — | 26 | 60 | mA |
| Operating Current | Iop | Po = 20 mW | — | 55 | 80 | mA |
| Operating Voltage | Vop | Po = 20 mW | — | 4.8 | 5.6 | V |
| Lasing Wavelength | Lp | Po = 20 mW | 400 | 405 | 410 | nm |
| Beam Divergence (⊥) | Qv | Po = 20 mW | 16 | 19 | 23 | ° |
| Beam Divergence (∥) | Qh | Po = 20 mW | 6 | 8.5 | 12 | ° |
| Off-Axis Angle (⊥) | dQv | Po = 20 mW | −3 | — | +3 | ° |
| Off-Axis Angle (∥) | dQh | Po = 20 mW | −3 | — | +3 | ° |
| Differential Efficiency | SE | — | 0.7 | 1.1 | — | mW/mA |
| Monitor Output Current | Im | Po = 20 mW | 0.1 | 0.2 | 0.5 | mA |
Full angle at half maximum (FWHM). Typical values are reference values.
Mechanical Package & Pin Configuration
- Package Type: Ø5.6 mm TO can
- Effective Window Diameter: ≥ 1.0 mm
- Tolerance: ±0.2 mm
Pin Connection
- LD (Laser Diode)
- CASE
- PD (Photodiode)
This pin layout supports straightforward electrical integration and closed-loop power control using the built-in photodiode.
Summary
The 405 nm laser diode with integrated photodiode offers an excellent balance of compact size, stable optical output, and precise power monitoring. Its robust electrical and thermal characteristics make it a dependable choice for industrial laser modules, optical instruments, and OEM laser systems requiring violet laser emission.