The numerical analysis of a broadly tunable ytterbium-doped fiber ring laser

Abstract

We present a novel numerical model for an ytterbium-doped fiber ring laser. A comprehensive numerical model based on an iterative solution of propagation rate equations is used to analyze the impact of various laser variables. The dependence of laser output power on pump power, ytterbium-doped fiber (YDF) length, and emission wavelength has been investigated, with the aim to optimize laser parameters with respect to emission wavelength and output power.Close to emission wavelength, the optical signal-to-noise ratio is higher than 65 dB. We also investigate that the initial oscillation is damped oscillation, and the laser output become steady-state output one millisecond later.

Suppression of the intensity noise in distributed feedback fiber lasers by self-injection locking

“…It has already been used in oscillators [25], semiconductor laser [26,27], solid laser [28], and fiber lasers [29][30][31][32]. It can effectively optimize the output behaviors of laser, such as to stabilize the frequency [29,33], to narrow the linewidth [3,27,34,35], or to ensure single-mode, singlepolarization operation and so on. Gu et al [35] reported a SIL fiber ring laser with three laser diode (LD) pump lasers and a saturable absorber, and explored the linewidth less than 2 kHz.…”

“…A similar laser approach was proposed in [36] to make the DFB fiber laser operate in a single polarization state, which was composed of a polarization-dependent isolator and an optical circulator. Other ways of utilizing SIL were also reported in some researches [29][30][31]33]. However, the output power [35,36], single polarization state and linewidth characters [34][35][36] of DFB fiber laser were discussed systematically by SIL, nothing about the relative intensity noise property of DFB fiber laser was mentioned in detail in these reports.…”