Description In Iran they tune the santur, but at Santur they tune lasers. Santur makes widely tunable laser components for optical communications networks, especially long-haul WDM (wavelength division multiplexing) systems. The company's transmitters and transponders use an array of lasers integrated on a single chip combined with an external modulator for wide tunability with reduced power loss. Santur's products are intended for use by telecommunications carriers, such as AT&T and Sprint Nextel. The company's customers include CoreOptics, Harris, and Opnext. Santur was founded in 2000 by Bardia Pezeshki (former CTO) and Ed Vail (director of packaging).