Rapidly reconfigurable 8-bit chip-scale true-time-delay module for high-bandwidth-preserving, multi-aperture, free-space laser-communication transmitter

Using a true-time-delay chip-scale module, free-space 1.55-/spl mu/m beam-steering over /spl plusmn/40/spl deg/ field-of-view with 2-ps laser pulses is reported. The measured reconfiguration speed of this 8-bit-programmable module (0 ps to 256 ps, 1-ps increments) is /spl sim/400/spl mu/s.