Zhang Yang, Ye Jun, Ma Xiaoya, Xu Jiangming, Song Jiaxin, Yao Tianfu, Zhou Pu
Opt Express. 2021 Feb 15;29(4):5516-5524. doi: 10.1364/OE.412224.
Multiwavelength fiber lasers, especially those operating at optical communication wavebands such as 1.3 μm and 1.5 μm wavebands, have huge demands in wavelength division multiplexing communications. In the past decade, multiwavelength fiber lasers operating at 1.5 μm waveband have been widely reported. Nevertheless, 1.3 μm waveband multiwavelength fiber laser is rarely studied due to the lack of proper gain mechanism. Random fiber laser (RFL), owing to its good temporal stability and flexible wavelength tunability, is a great candidate for multiwavelength generation. Here, we reported high power multiwavelength generation at 1.3 μm waveband in RFL for the first time. At first, we employed a section of 10 km G655C fiber to provide Raman gains, as a result of which, 1.07 W multiwavelength generation at 1.3 μm waveband with an optical to signal noise ratio of ∼33 dB is demonstrated. By tuning the pump wavelength from 1055 nm to 1070 nm, tunable multiwavelength output covering the range of 1300-1330 nm can be achieved. Furtherly, we realized 4.67 W multiwavelength generation at 1.3 μm waveband by shortening the fiber length to 4 km. To the best of our knowledge, this is the highest output power ever reported for multiwavelength fiber lasers.
多波长光纤激光器，尤其是那些工作在1.3μm和1.5μm等光通信波段的激光器，在波分复用通信中有巨大需求。在过去十年中，工作在1.5μm波段的多波长光纤激光器已有广泛报道。然而，由于缺乏合适的增益机制，1.3μm波段的多波长光纤激光器很少被研究。随机光纤激光器（RFL）因其良好的时间稳定性和灵活的波长可调性，是产生多波长的理想候选者。在此，我们首次报道了随机光纤激光器在1.3μm波段产生高功率多波长。首先，我们使用一段10 km的G655C光纤来提供拉曼增益，结果表明，在1.3μm波段产生了1.07 W的多波长，光信号噪声比约为33 dB。通过将泵浦波长从1055 nm调至1070 nm，可实现覆盖1300 - 1330 nm范围的可调多波长输出。此外，通过将光纤长度缩短至4 km，我们在1.3μm波段实现了4.67 W的多波长产生。据我们所知，这是多波长光纤激光器报道的最高输出功率。
