On what principle(s) do aircraft smoke detectors work? I know there are smoke detectors in aircraft but on what principle(s) do they generally work?

Commercial smoke detectors can use several different techniques like optical sensing, heat sensing and particle sensing. Do aircraft smoke detectors also work using one of these technologies or something different?
The typical aircraft smoke detector works using optical sensing which exploits the Tyndall light scattering effect.

From Boeing:


(Source)

An LED illuminates a sample of air while a light sensor, which is not in line-of-sight with the LED, looks at the same sample of air. If enough light is scattered by smoke particles then the detector will signal an alarm.