Focusable IR Laser Diode Module 808nm 850nm PWM | Elubor

Elubor Focusable Infrared Laser Diode Module — 808nm / 850nm with PWM Control

Take precise control of near-infrared laser output with this compact, adjustable IR laser diode module from Elubor. Available in 808nm (500mW) and 850nm (1W) configurations, this mini metal-body module delivers a focused dot beam with PWM-based power and switch control — ideal for professional stage setups, sensing applications, optical experiments, and DIY electronics projects.

Key Specifications

• Wavelengths: 808nm / 850nm
• Output Power: 808nm – 500mW  |  850nm – 1W
• Working Voltage: 12V DC
• PWM Signal: 0–12V, frequency <18kHz
• Laser Shape: Dot (rectangular to oval — not a perfectly round dot)
• Focusable: Yes — adjustable focus head
• Body Size: 33 × 70 mm
• Material: Metal (Black)
• Power Source: AC adapter (12V)
• Batteries Required: No
• Model: 850M-3370

Wiring & Interface

The laser module features a 4-pin wiring interface for straightforward integration:

• Red wire: 12V+ power supply
• Yellow wire: PWM+ signal input
• Black wire: Power supply GND
• White wire: Signal GND

The power supply ground and signal ground are shared. For basic operation without PWM control, simply connect the red wire to 12V+ and the black wire to GND — the module will emit continuously. The PWM signal input is only needed when you want to switch the laser on/off or modulate its output power programmatically.

Why Choose This IR Laser Module?

• ✔ Compact Mini Design — Easy to mount and integrate into tight enclosures or rigs
• ✔ Adjustable Focus — Dial in your beam precisely for your specific working distance
• ✔ PWM Compatible — Seamlessly integrate with microcontrollers, PLCs, or dedicated PWM drivers
• ✔ Durable Metal Body — Solid construction for reliable, long-term use
• ✔ Versatile Wavelength Options — 808nm or 850nm to match your optical or sensing requirement

Package Contents

• 1 × 808nm / 850nm Infrared IR Laser Diode Module

Made in Mainland China.

⚠️ Laser Safety Notice: This module emits invisible infrared laser radiation. Always follow proper laser safety protocols. Never point the beam at people or animals. Use appropriate IR-rated safety eyewear when operating. Refer to CPSC Radiation-Emitting Products Safety Guidelines for safe handling of laser-emitting devices.

Frequently Asked Questions

Q: Can I use this IR laser diode module without a PWM signal?

A: Yes. Simply connect the red wire to a 12V+ power supply and the black wire to GND. The module will emit laser light continuously without any PWM signal connected. The PWM input (yellow and white wires) is only required if you want to control the laser's on/off state or adjust its output power dynamically.

Q: What is the difference between the 808nm and 850nm variants of this module?

A: Both wavelengths are near-infrared and invisible to the naked eye. The 808nm variant outputs 500mW, while the 850nm variant outputs a higher power of 1W. Your choice depends on your specific application — 808nm is commonly used in optical pumping and sensing, while 850nm is widely used in short-range optical communication, night-vision illumination, and proximity sensing systems.

Q: What does "focusable" mean for this laser module?

A: The module features an adjustable focus head that allows you to mechanically tune the collimation of the output beam for your specific working distance. This lets you achieve a tighter or broader dot depending on your application requirements.

Q: What PWM frequency range does this module support?

A: This laser module supports a PWM signal of 0–12V with a frequency below 18kHz. It is compatible with most standard microcontroller PWM outputs (such as Arduino, Raspberry Pi, or dedicated PWM drivers) as long as the signal voltage and frequency remain within these limits.

Q: Is protective eyewear needed when using this module?

A: Yes. This module emits invisible infrared laser radiation at power levels that can cause serious eye injury. Always use appropriate laser safety eyewear rated for the 808nm or 850nm wavelength range when operating or working in proximity to the beam.