850nm 40mW Laser Diode with Built-in Photo Diode TO18 5.6mm Package The QSI 850nm 40mW laser diode, grown via MOCVD with an AlGaAs quantum well structure — engineered as a robust light source for industrial optical modules and sensor applications. Operating at a typical 855nm wavelength (ranging 845–865nm), it delivers a steady 40mW continuous-wave (CW) optical output (with a 60mW maximum rating). Housed in a compact TO-18 (5.6mm) package, it integrates a built-in photodiode for real-time laser performance monitoring, simplifying integration into precision industrial setups. Engineered for efficiency and consistency, it features a 30mA typical threshold current, 95mA typical operating current (at 40mW output), and 2.0V typical operating voltage — paired with a 1.1mW/mA slope efficiency to optimize energy conversion. Its controlled beam divergence (9° parallel, 18° perpendicular typical) ensures focused, stable light delivery, while it functions reliably across a -10 to 60°C operating temperature range (and -40 to 85°C during storage). Whether powering industrial optical modules or high-sensitivity sensors, this 850nm 40mW laser diode combines QSI’s advanced quantum well engineering, built-in monitoring, and compact design to meet the demands of mid-power, high-precision optoelectronic applications. Core Specification: Wavelength 850nm Output Power 40mW Working Voltage 2V Package TO18 5.6mm Condition Original package and brand new Lifespan > 10,000 hours BU-LASER has other Laser diodes from 375nm to 1064nm: Color Wavelength Power Range Package UV 375nm 500mW TO5-9mm UV 380nm 200mW TO18-5.6mm Violet 395nm 300mW TO18-5.6mm Violet 405nm 20mW-3W TO18-5.6mm /TO5-9mm Blue 425nm 1.5W TO18-5.6mm Blue 435nm 5W-7W TO5-9mm Blue 450nm/455nm 80mW -5.5W TO18-5.6mm /TO5-9mm Blue 462nm/ 465nm 1.4W- 2.8W TO5-9mm Cyan 488nm 55mW-300mW TO18-5.6mm Green 515nm/520nm 10mW-1.6W TO18-3.8mm/TO18-5.6mm/TO5-9mm /Frame Red 635nm/638nm/642nm 5mW-2.5W TO18-3.8mm/TO18-5.6mm/TO5-9mm Red 650nm /658nm/660nm 5mW-1W TO18-3.3mm/TO18-3.8mm/TO18-5.6mm/C-mounted / Frame Red 670nm 5mW TO18-5.6mm Infrared 780nm/785nm 5mW-200mW TO18-5.6mm Infrared 808nm 200mW-5W TO18-5.6mm/TO5-9mm/C-mounted Infrared 830nm 30mW-300mW TO18-5.6mm Infrared 850nm 5mW-2W TO18-5.6mm Infrared 905nm 15W-75W TO18-5.6mm Infrared 940nm 250mW TO18-5.6mm Infrared 980nm 50mW-1W TO18-5.6mm/TO5-9mm Infrared 1064nm 50mW TO18-5.6mm
