Er-doped all-fiber laser mode-locked by graphitic carbon nitride nanosheets

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2018,（8）
• 页码范围: 54-57
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201816.081402

摘要

Few-layer graphitic carbon nitride (g-C3N4) nanosheets were fabricated and utilized as a saturable absorber for mode-locking in an Er-doped fiber laser with net normal dispersion. The g-C3N4/polyvinyl alcohol (PVA) hybrid-film-based saturable absorber has a modulation depth of 4.01％ and a saturation intensity of 7.5 MW/cm2. By integrating g-C3N4-PVA mode-locker into the laser cavity, a mode-locked operation could be obtained. The achieved mode-locking pulse centered at 1530.3 nm has a pulse width of 530 ps. Its repetition rate is 40.8 MHz, and the corresponding signal-to-noise ratio is about 55 dB.