1480/spl sim/1485 nm cascaded CW Raman fiber laser

Summary form only given. Recently, distributed Raman amplifiers have been demonstrated to obtain broad gain bandwidth of the optical amplifiers. To achieve L band signal (1570-1610 nm) amplification using Raman gain in a silica fiber, a pump power at wavelengths around 1485 nm is required. In this letter we demonstrate a simple and versatile cavity configuration for a tunable cascaded Raman fiber laser which converts 1313 nm pump light to wavelengths range of 1480-1485 nm.