中文摘要：

基于半导体光放大器（SOA）的环形腔激光器可在超过100nm的调谐带宽内实现全带宽范围的兆赫兹级调谐，且输出激光信噪比高、平坦度好，因此在光纤通信、光纤传感和生物光子学领域应用广泛。采用稳态模型和分段算法，分别讨论了线性函数、二次函数、指数函数和平方根函数形式注入电流对SOA的增益谱和SOA峰值波长的影响，研究非均匀注入对SOA增益特性和环形腔激光器输出特性的影响。结果表明，输出激光波长在较大平均注入电流时随电流变化较小，且在指数型非均匀注人时存在变化率为0的极值点，可获得很高的波长稳定性。

英文摘要：

Semiconductor optical amplifier-based ring cavity laser （SOA-RL）, which has been widely used in optical communications, optical fiber sensing, and bio-photonics fields, can be tuned at an ultra high speed up to megahertzs over 100 nm bandwidth range with high signal-to-noise ratio （SNR） and good flatness output. A steady-state model and segmentation algorithms are employed to investigate the gain spectra of the SOA and the laser wavelength of the SOA-RL when the SOA is driven by some non-uniform injections, such as linear, quadratic, exponential, or square root functions. The results show that the laser wavelength changes slowly with the change of injection current when its average is greater, and there is a minimum value when the injection current is exponentially distributed along the SOA, which exhibits high wavelength stability.