High-sensitivity receiver for infrared laser communications

Coherent optical array receiver for PPM signals under atmospheric turbulence

“…Early systems operated in free space used high power long-wavelength laser sources (DeLange, 1972, Goodwin, 1967, Nussmeier et al, 1974, Peyton et al, 1972. Even today, coherent space communications still has advantages over on-off keying (Chan, 1987, Rochat et al, 2001, especially for inter-satellite communications.…”

Narrow Gap Semiconductors

“…x Cd x Te diode operated at 20 MHz, 188 about 1.7 mW for a second diode at 30 MHz, 192 and 1 mW for a third diode at 400 MHz. 187 …”