Meaning of self-heterodyne in English:

self-heterodyne

Pronunciation /ˌsɛlfˈhɛt(ə)rədʌɪn/

adjective

Radio
  • Designating a heterodyne radio receiver or circuit in which the part used for the detection of the signal also functions as the local oscillator; (also) relating to or employing such a receiver or circuit. In later use also: designating a method used in laser or optical communications technology to measure the linewidth of the optical spectrum of an incoming beam, in which the beam is split and recombined with a modulated version of itself.

Origin

Early 20th century (in an earlier sense). From self- + heterodyne.