Research On Self-Seeded Multi-Wavelength Brillouin-Erbium Fiber Laser

In order to satisfy the request of super high speed, super high capacity optical communication system, lots of optical communication models appear. Among them, the WDM (Wavelength Division Multiplexing) technique becomes a hot subject and a research frontier because of its reconfigurability, transparency, compatibility and survivability. Among the active fiber components, the fiber lasers, especially the wavelength tunable fiber laser, attract researchers'attention because of its simple integrity with the basic fiber systems and good temperature stability. Fiber lasers are emerging as an interesting alternative to semiconductor laser diodes for use in future WDM communication system. Tunable laser is the key devices in WDM fiber communication system, and is used in the fields of optical sensing system and high resolution spectroscope as well.Multi-wavelengh Brillouin-erbium fiber laser combines the linear gain from the EDF and the Brillouin nonlinear gain from the SMF.In this paper, we demonstrate a dual-cavity self-seeded multiwavelength Brillouin-erbium fiber laser. With such a design, 2x52 combs can be obtained with 11GHz spacing. This is the best result in similar design to the best of our knowledge. Also, combs with double line spacing can also be obtained due to dual-cavity structure. We analysis the impact of 980 pump power to the combs. In addition, we proposed a new NOLM-NALM self-seeded multiwavelength Brillouin-Erbium fiber laser. The fiber laser was formed by 16.5m EDF as linear gain and 12000m SMF as nonlinear gain. We got 61 Brillouin stokes when 980nm pump was set at 270mA output.