808nm Band Pass Filter for Diode Pumped Systems

808nm Band Pass Filter for Diode Pumped SystemsAt 808 nm, numerous Nd-doped gain media, such as Nd:YAG, exhibit strong absorption characteristics, rendering this wavelength band essential for diode-pumped solid-state (DPSS) lasers. A narrow 808 nm bandpass filter is commonly employed for pump monitoring, spectral cleanup, and safety interlock systems. The pump transitions of Nd:YAG around 808 nm are widely adopted in in-band pumping configurations, and many commercial diode and laser platforms include 808 nm among their supported red/NIR emission lines. During integration, the center wavelength of the passband tends to blue-shift with increasing angle of incidence (AOI), necessitating strict angular control of the chief ray in optical fixtures. Anti-reflection (AR) coatings are applied to reduce reflective losses, while hard-coated filter stacks, such as ion-beam sputtered (IBS) or plasma-deposited types, ensure long-term spectral and environmental stability under continuous operation…

Cut Off Type Glass Selective Absorption Type Glass Band Pass Filter