Stable and High OSNR Compound Linear-Cavity Single-Longitudinal-Mode Erbium-Doped Silica Fiber Laser Based on an Asymmetric Four-Cavity Structure

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2012,（10）
• 页码范围: 54-57
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/29/10/104205

摘要

We propose a stable and high optical signal-to-noise ratio (OSNR) compound linear-cavity single-longitudinalmode (SLM) erbium-doped silica fiber laser.It consists of three uniform fiber Bragg gratings (FBGs) and two fiber couplers to form a simple asymmetric four-cavity structure to select the longitudinal mode.The stable SLM operation at the wavelength of 1544.053nm with a 3dB bandwidth of 0.014nm and an OSNR of ～60dB was verified experimentally.Under laboratory conditions,a power fluctuation performance of less than 0.05 dB for 5 h and wavelength variation of less than 0.01 nm for about 150 min is demonstrated.Finally,the characteristic of laser output power as a function of pump power is investigated.The proposed system provides a simple and cost-effective approach to realize a stable SLM fiber laser.