Fiber optic VLSI LANs which use optical processing of the medium access protocol are investigated. The experimental demonstration of all-optical networks utilizing asynchronous code-division multiple access or spread spectrum at 100 Mbps and fixed assignment time-division multiple access at 500 Mbps is reported. Both passive and active star architectures are considered. The active star is implemented with a self-routing LiNbO3 integrated optic switch. Novel fiber optic interconnect devices required to construct such a network are demonstrated using a laser-assisted etching technique.