Mutually pumped phase conjugator for remote identification

Claim 1

A universal identification of friend or foe (IFF) method utilizing a real time communications link between two distinct positions to establish positive identification comprising the steps of: providing a first signal from a pumped laser at a first position; providing means for modulating said first signal at said first position; generating a second signal from a remote laser beacon at a second position at the same wavelength as said first signal; providing means for detecting a signal at said second position; transmitting said second signal in a predetermined pattern from said second position; imputing said modulated first signal into a mutually pumped phase conjugation mirror (MPPCM) at the first position to establish a MPPCM beam fan field of view; providing means to allow the MPPCM beam fan to scan a predetermined field of view; providing means for detecting a signal at said first position; detecting the transmitted second signal at the first position; establishing a two-way phase conjugated signal by uniting the first and second signal in the MPPCM so that each of the first and second signals generates simultaneously a temporally modulated phase conjugated return of the other of said first and second signals so that effecting lock-on; modulating said first signal at said first position; detecting said two-way phase modulated conjugation signal at said first and second positions, whereby a real-time optical communications link is established between both distinct positions allowing for the approximately immediate transferral of digital information with positive locational direction and identification of both distinct positions.