In the cw-operated emitters of the EK series the emitting element is made of KanthalTM. To increase the output power, a gold-coated parabolic mirror is integrated in the TO housing. The emitter achieves temperatures of between 900°C and 1050°C.
Pulsed emitters with peak temperatures of approximately 700°C are characteristic for the EF series. These emitters have three emitting NiCr filaments that can be operated either together (2-pin TO-8 housing) or individually (4-pin TO-8 housing).
Also pulsable are the EP series emitters with a tungsten filament; they achieve temperatures above 1650°C. Thus, they are perfectly suited for NIR applications. They are exclusively available in a TO-8 housing with a sapphire window.
The EK and EF series are available both with and without sapphire, CaF2, or ZnSe windows.
More Information: http://www.lasercomponents.com/de-en/product/ir-emitters/