In order to study the optical feedback characteristics at the dual frequency laser, a birefringent external cavity was studied throughboth theoretical analysis and experiments. 摘要為了研究雙頻激光器的光回饋特性，採用雙折射外腔光回饋的方法，進行了理論分析和實驗驗證，取得了雙頻激光器中條紋倍頻現象的數據。
Methods and mechanism of obtaining single-frequency in all-solid-state intracavity frequency doubling lasers by single-longitudinal-mode ways are described in this paper. 本文詳細分析了用單縱模法實現全固態腔內倍頻激光器單頻輸出的各種方法和實驗裝置。
