The wavelength of an infrared laser pointer can vary depending on the specific laser diode used. However, infrared laser pointers commonly operate in the range of wavelengths known as near-infrared (NIR), which typically spans from around 700 nanometers (nm) to 1 millimeter (mm).
More specifically, common types of infrared laser pointers often emit light at wavelengths around 800 nm, 850 nm, or 980 nm. These wavelengths are outside the visible range of light that the human eye can perceive, but they can be detected by certain devices and sensors designed to interact with infrared radiation.
It's worth noting that the exact wavelength of an infrared laser pointer can depend on the manufacturer, intended application, and specific model. Therefore, it's always best to consult the specifications or product information provided by the manufacturer to determine the precise wavelength of a particular infrared laser pointer.