SAN DIEGO, April 9 – AirFiber Inc., a developer of wireless optical networking equipment, has received $50 million in the first closing of its third round of equity financing. The round, lead by GM Capital Partners, also included London Merchant Securities and several of AirFiber's existing investors. "We are pleased with the level of interest in AirFiber among new investors and appreciate the backing that our previous investors have shown," said Jim Dunn, CEO of AirFiber.