Multiple wavelength generation with brillouin/erbium fiber lasers

Brillouin/erbium fiber lasers, which have recently been demonstrated, operate with a combination of brillouin gain and gain in erbium-doped fiber. In this letter, we describe techniques for cascading the brillouin/erbium fiber laser to generate optical combs, and experimentally demonstrate optical comb generation. Internal and external cascading techniques are demonstrated, The line spacing in the combs is approximately 10 GHz, with operation in the 1550-nm region.