  We present the first demonstration of a local oscillator (LO)-less digital
signal processing (DSP)-free coherent receiver for high-capacity short distance
optical links. Experimental results with an analog domain constant modulous
algorithm (CMA)-based equalizer chip for the self-homodyne quadrature phase
shift keying (SH-QPSK) system validate the employability of an all-analog and
LO-less receiver for low-power interconnects.
