硫系玻璃具有超宽的红外光谱透过范围、极高的线性和非线性折射率,已成为目前唯一能产生中远红外超连续(SC)谱输出的光纤基质材料, 近三年来国际上在此领域取得了系列重要进展。从硫系阶跃型光纤、微结构光纤和拉锥光纤中的红外超连续谱输出以及光谱相干性、全光纤化SC光源等几个方面综述了硫系玻璃光纤的最新研究进展。

光纤中的非线性效应是限制高功率 光纤激光器发展的重要因素。通过抑制激光器时域的不稳定性(自 脉冲现象)，可以提升非线性效应的阈值。基于全光纤化的谐振 腔引入了简单的光纤珐珀腔，使噪声抖动降至原先的1/3，并实现了自脉冲 抑制的稳定的连续激光输出。这种简单的腔结构保持了较高的 斜率效率(76.5%)，实现了高功率的激光输出(48.7 W泵浦光产 生36.5 W激光)。这种腔结构中的全光纤化谐振腔不仅可以用作稳定的 连续激光运转激光器，而且还可以用作更高功率光纤放大器的种子，用于限 制非线性效应的产生。

An all-fiber Faraday rotator isolation rate measurement system is designed and realized. The system has tremendous advantage for large aperture Faraday isolator on-line measurement due to its flexible alignment and more compaction. Employing the method of relative transmission measurement and transmissions contrasting between static and operating states, single-shot isolation-rate measurement is achieved. The available measurement range larger than 33 dB is demonstrated experimentally. And the potential to get measurement range larger than 50 dB by adjusting the coupling rate of the fiber couplers is affirmed. Measurement accuracy of 2.2%of PV value is achieved even while keeping the input pulse energy and polarization in random vibration, which illustrates that the influence of the input pulse energy and polarization vibration on the measurement accuracy is eliminated.

An all-fiber Faraday rotator isolation rate measurement system is designed and realized. The system has tremendous advantage for large aperture Faraday isolator on-line measurement due to its flexible alignment and more compaction. Employing the method of relative transmission measurement and transmissions contrasting between static and operating states, single-shot isolation-rate measurement is achieved. The available measurement range larger than 33 dB is demonstrated experimentally. And the potential to get measurement range larger than 50 dB by adjusting the coupling rate of the fiber couplers is affirmed. Measurement accuracy of 2.2%of PV value is achieved even while keeping the input pulse energy and polarization in random vibration, which illustrates that the influence of the input pulse energy and polarization vibration on the measurement accuracy is eliminated.

报道了一种双包层七芯光子晶体光纤，其零色散点在1036 nm，在波长1060 nm处非线性系数为2.43 W-1·km-1。采用中心波长为1060 nm、脉冲宽度为160 ps、重复频率为1 MHz、光束质量M2<1.3、最大输出功率为4.5 W的增益开关皮秒脉冲全保偏光纤激光器抽运35 m的七芯光子晶体光纤，得到最大输出功率为2.443 W、谱宽范围500~1700 nm的全光纤化超连续谱输出。实验所测的超连续谱输出远场与模拟的同相位超模远场分布非常吻合，故对高功率超连续谱产生具有参考价值。

报道了一种可以被动式产生高峰值功率亚纳秒脉冲的全光纤化的新型Yb光纤激光器。通过在 15 m长度的Yb增益光纤和一对光纤光栅对组成的线性谐振腔内直接熔接一段特殊掺杂的Bi/Cr共掺石英光纤，在975 nm的半导体激光器连续抽运下，实现了高重复频率的高峰值功率亚纳秒短脉冲激光输出。实验结果表明，输出激光的重复频率与吸收的抽运光功率呈线性关系，脉冲激光峰值功率超过30 kW，在吸收抽运功率为8.2 W时，光纤激光器获得了重复频率最高为50.2 kHz、平均功率为2 W的亚纳秒脉冲激光输出。分析实验现象可以发现，在亚纳秒脉冲激光的产生过程中受激布里渊散射起着关键的作用。此外，观测光谱发现在Bi/Cr共掺石英光纤端有非常平坦的红外超连续谱输出，光谱覆盖范围超过1000 nm, 光谱平坦度小于5 dB。

全光纤化掺铥光纤激光器作为光学参量振荡器的泵浦源，可以实现3~5 μm激光输出，在激光雷达和光电对抗领域有着极为重要的应用前景.本文运用全国产化的泵浦光耦合器和双包层掺铥光纤实现了全光纤化掺铥光纤激光器.该光纤激光器采用自制的光纤布喇格光栅作为反射腔镜，增益光纤采用水冷的方式.光纤布喇格光栅通过45 fs、800 nm的飞秒脉冲光和相位掩模板直接在双包层掺铥光纤上刻蚀得到，泵浦光通过泵浦光耦合器的一端耦合进入增益光纤，产生的激光由泵浦光耦合器的另一端输出.输出激光的最高功率达到22.2 W，激光波长为1.96 μm，斜率效率约为37%，激光线宽为72.4 pm.

We report on hundred watts range ytterbium-doped all-fiber laser assembly based on the master oscillator power amplifier structure. It consisted of an oscillator and an amplifier with all-fiber components. And fiber fusion splice made the laser be an integrated fiber system. It generated up to 175.5 W of continuous-wave (CW) output power at 1085 nm with more than 75% extraction efficiency in the amplifier when the total coupled pump power into the double clad fiber was 270 W.