4W Industry Laser 445nm/447nm/450nm 4000mW Blue Laser Dot Module Diode NDB7A75 w/ TTL0-20kHz & Fan Cooling & Long Time Working: Amazon.com: Industrial & Scientific
High Power Laser Diode Driver ( 100 AMPS / 30 VOLTS )
An Endurance Mo1 PCB - a TTL control for your laser [10 PCS] – Endurance Lasers