75-femtosecond all-fiber ultrashort pulse laser

• 来源期刊: 科学通报(英文版)
• 年，卷（期）: 2008,（13）
• 页码范围: 1937-1940
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11434-008-0226-4

摘要

We report the direct generation of 75-femosecond pulses from a stretched-pulse fiber ring laser using the nonlinear polarization rotation mode-locking mechanism. As the gain media in the laser, the high-doped erbium-doped fiber working at positive dispersion was used to compensate the negative dispersion of standard single mode fiber. Under a 125 mW pump power, the average output power was higher than 15 mW, with a 25.9 MHz repetition rate and 53 nm spectrum width. Meanwhile, the pulse energy was greatly improved, which could reach 0.6 nJ. The laser easily achieved mode-locking and ran stably at room temperature. All-fiber construction makes it compactable and portable.