oxlasers 405nm 500mW Blue Violet Laser Module for 3D Printer 12V Focusable DIY UV Laser Head for Engraving and Cut with TTL PWM|3D Printer Parts & Accessories| - AliExpress
HL40033G 405 nm 1 W Violet Laser Diode
Electra Pro | 405 nm Portable Violet Laser | Laserglow
OBIS 405nm LX 100mW Laser System
405/473/532 nm Triple Wavelength DPSS/Diode Laser System | 300 - 300 mW Output Power | Laserglow
Blue laser - Wikipedia
405nm Laser Diodes
Cube 405 Laser | Coherent Inc. | Mar 2008 | Photonics.com