CPRI transceiver for mobile front-haul based on wavelength division multiplexing

This paper describes the necessity of the optical transceivers for the mobile fronthaul based on wavelength division multiplexing (WDM). Among various candidates, we have proposed an external cavity laser (ECL) based on inexpensive thin film filter. Transmission over single mode fiber of 20 km is examined under direct modulation of common public radio interface (CPRI) line rate option 3.