高效液相色谱-质谱法测定乌头碱在急性中毒大鼠体内的分布

为配合乌头类药材合理应用，本文建立了高效液相色谱-质谱联用(HPLC—MS)测定组织样品中乌头碱的方法，并对急性中毒大鼠体内的乌头碱分布进行了测定。     

S波段可调谐掺铒光纤激光器的实验研究

提出了一种结构简单的S波段环形腔可调谐光纤激光器.研究了输出功率随激光波长和抽运功率的变化关系以及激光器运转的稳定性.当抽运功率113 mW时,通过调节全光纤可调谐法布里珀罗滤波器,在1482.73～1520.75 nm范围内得到了稳定的激光输出,3 dB带宽小于0.03 nm.其中1487.70～1520.75 nm范围内输出功率大于5 dBm,边模抑制比大于60 dB.1499.02 nm处最大输出功率7.11 dBm,输出功率起伏小于0.04 dB.     

A Two-Stage S-Band Erbium-Doped Fiber Amplifier Based on W-type Erbium-Doped Fiber

An S-band erbium~doped fiber （EDF） amplifier based on a W-type EDF designed by ourselves is demonstrated by employing a two-stage double-pass configuration. The amplifier provides a bandwidth of 34 nm （1486-1520 nm） for the gain over 20dB. The maximal gain of 32.8dB is achieved at 1501 nm and the corresponding noise figure is 6.0 dB. The proposed amplifier has a promising foreground in extending the current network to the S band.