2.8W 445nm 9mm Laser Diode Component


SKU: LD445_2_8W Category:


Bigger and Even More Power!

This is the same as our other new 445nm 9mm laser diode but we have added our High Efficiency AR Coated Glass lens with 30% higher efficiency than our traditional three element glass lenses!  It has way more power than the 2W laser we have been offering. The difference is that this bad boy can run for extended times at 2.2W at 1.5amps!  This laser has a maximum limit of over 2.8W at 2.5amps and should only be over-driven like this for very short times.   This level of power certainly creates the ability to cut more and do more with your laser.  The spot size is a bit bigger, so very small engraving will be a bit more difficult, but the trade-off in more optical power on the work surface is worth it.  This laser is very effective and can run for extended times at 1.5amps and we recommend not going much over 2 amps for extended periods of “on time”.  This laser also has internal ESD device for an extra level of static protection.

This multi transverse mode laser diode component is pressed fit mounted in an aluminum housing and has an aluminum mountable heat-sink.  The laser is set in the heat sink with thermally conductive paste.  The front of the component contains a adjustable glass focusing lens for the laser output.  The laser has an ABSOLUTE MAXIMUM of 2.8W at 2.5amps and should only be run at this level for very short times.  Additional cooling techniques would be advisable if you want to run for extended periods at higher powers.  1.5 amp at 2.2W will allow for longer “on” times and will not degrade the laser as quickly.  Thermal issues are the number one reason for catastrophic failure of the laser.  While the mounting case provides heat sinking capability for the laser diode, it is up to the consumer to make sure the laser is operating effectively within these limits.

Absolute Maximum Ratings:

Item Absolute Maximum Ratings Unit
Forward Current (Tc = 25°C) 2.5 A
Absolute max output optical power >2.8 W
Allowable Reverse Current (Tc = 25°C) 85 mA
Operating Case Temperature 50 °C

Electrical / Optical Characteristics:

Item Min Typ. Max Unit
Optical Output Power @1.3 amps 1.6 W
Optical Output Power @1.5 amps 2.2 W
Dominant Wavelength 435 455 nm
Threshold Current 80 220 mA
Operating Voltage 3.7 5.5 V
Focused Spot Size 0.007 0.009 Inches
Beam Divergence Full Angle (1/e^2) // 5 14 25 deg.
Beam Divergence Full Angle (1/e^2) – Perp 30 44 50 deg.

-Above specifications are for reference purposes only and are subject to change.  Figures in specifications may contain measurement errors.

Dimensions and mounting hole locations:

J Tech Photonics Laser Diode Component and Mount dimensions

Output Conditions

The laser diode output will vary depending on the temperature.  While there is a housing and a small heat sink, it is recommended that the diode not be on for long periods of time.  The laser diode will also require more current to maintain the same amount of output power as the diode degrades.

Static Precautions

Take precaution when handling laser diodes as they are a static sensitive devices.  There is a built in protection in the diode which can help in normal static situations but it is no guarantee.  Static electricity and electrical surges will degrade the performance of the laser diode.

Laser Safety

Laser light can cause damage to eyesight and skin if proper laser safety is not used.  Always wear the appropriate laser goggles to prevent any laser light, either directly or indirectly to contact the eye.  Never expose skin directly to laser radiation.  Focused light will increase the safety hazard.

Class 4 Laser Radiation Sticker 2_8w small

Purchase Safety Goggles!  Click Here!

Additional information

Weight 0.1 lbs
Dimensions 4 × 3 × 1 in


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