High power TO18/diameter 5.6mm 940nm 200mw infrared laser diode IR laser emitter head invisible light machine sensor parts - AliExpress
940nm 300mw 5.6mm Laser Diode QL94R6SX-S | eBay
Industry/Lab High Power 940nm 3000mw 3W Infrared IR Laser Dot Module + Analog 0-30KHZ + TEC Cooling 85-265V + Lab Adjustable Digital Power Supply LSR-PS-II: Amazon.com: Industrial & Scientific