Updated September 23, 2019 by Will Rhoda

The 7 Best Diode Lasers

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This wiki has been updated 3 times since it was first published in August of 2019. Diode lasers employ doped semiconductors and collimating lenses to generate and concentrate photons into focused beams of light. In recent decades, these devices have become increasingly common and are now considered intrinsic parts of many technological processes. Though they are often seen in dentistry and dermatology, our rankings focus on options for aiming, aligning, cutting and engraving. When users buy our independently chosen editorial recommendations, we may earn commissions to help fund the Wiki. Skip to the best diode laser on Amazon.

7. Lights88 Purple Blue

6. Infiniter Quarton VLM-650-29

5. Q-Baihe Focusable Module

4. Txinlei Dot Module

3. Toauto Adjustable Focusable

2. Laserland 11061026

1. Oxlasers Blue Module Engraver

Editor's Notes

September 20, 2019:

Diode lasers employ doped semiconductors and collimating lenses to generate and concentrate photons into focused beams of light. In recent decades, these devices have become increasingly common and are now considered intrinsic parts of many technological processes. Though they are often seen in dentistry and dermatology, our rankings focus on options for pointing, aligning, cutting and engraving.

It should be noted that these devices are not toys, and that even low-wattage offerings present the potential for eye injury if improperly used. Do your due diligence and be double sure that your intended usage for your purchase does not exceed the limitations of its safe applications.

A few things to keep top of mind while shopping this category:

What’s your intended use for the laser? While contractors and carpenters might be looking for a line laser to help them out levelling their installations, somebody in textile manufacturing might be looking for a crossline offering to help them line up pockets on shirts. Maybe you’re looking for something as simple as a dot laser to function as a basic laser pointer.

What color would you like? Described as ‘wavelength,’ and measured in nanometers, diode lasers are available in a variety of colors, and you’ll want to pick one that’s easily visible during usage – which will depend on what you’re doing. Certain colors are predisposed to being seen more easily by the human eye. A green laser, for example, in a watt-to-watt comparison, will appear brighter to humans than a red laser.

How powerful do you need this laser to be? While it’s unlikely that you’ll mistakenly purchase a unit that packs all the punch of a Star Wars blaster or a Star Trek phaser, that still doesn’t mean that you want to be accidentally using an engraving laser intended for a CNC machine to do stage lighting. Be cognizant of each offering’s wattage as you shop, and select one that’s strong enough (but not too strong) for your intended purposes.


Will Rhoda
Last updated on September 23, 2019 by Will Rhoda

After deciding that the pen was mightier than the pliers, Canadian electrical contractor William Rhoda abandoned his career and headed back to college, where he majored in marketing and advertising and won a scholarship along the way to earning a diploma in creative communications. His past career landed him a depth of knowledge in tools and hardware, while his current career schooled him in audio, video and camera equipment. During his leisure time, he’s learned lots about outdoor gear, and years of tiresome backyard maintenance have taught him all about pools and hot tubs. His recreational pursuits include rest, relaxation and revolutionary action, and his roommate’s a hairless cat.


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