Qin Guanshi, Liao Meisong, Suzuki Takenobu, Mori Atsushi, Ohishi Yasutake
Research Center for Advanced Photon Technology, Toyota Technological Institute, Nagoya, Japan.
Opt Lett. 2008 Sep 1;33(17):2014-6. doi: 10.1364/ol.33.002014.
We report a widely tunable ring-cavity tellurite fiber Raman laser covering the S+C+L+U band. A tunable range (1495-1600 nm, limited by the tunable optical bandpass filter) over 100 nm is obtained by using a single-mode tellurite fiber with high Raman gain coefficients (55 W(-1)km(-1)) and large Raman shift (approximately 22.3 THz) as the gain medium. Furthermore, the free-running 1665 nm Raman fiber laser is achieved from the ring cavity by removing the tunable optical bandpass filter, which shows that such a tellurite fiber has potential for constructing a widely tunable fiber Raman laser covering the S+C+L+U band. A high optical signal-to-noise ratio of over 60 dB for almost all of the tunable range is also demonstrated.
我们报道了一种覆盖S+C+L+U波段的宽可调谐环形腔碲酸盐光纤拉曼激光器。通过使用具有高拉曼增益系数（55W⁻¹km⁻¹）和大拉曼频移（约22.3THz）的单模碲酸盐光纤作为增益介质，获得了超过100nm的可调谐范围（1495 - 1600nm，受可调谐光学带通滤波器限制）。此外，通过移除可调谐光学带通滤波器，在环形腔中实现了自由运转的1665nm拉曼光纤激光器，这表明这种碲酸盐光纤有潜力构建覆盖S+C+L+U波段的宽可调谐光纤拉曼激光器。几乎在所有可调谐范围内还展示了超过60dB的高光学信噪比。
