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- Due to its relative small losses, theoretically it is supposed to get 50% of conversion effi. ciency at a pump level of 600 mW by using a BBO crystal with cutting angle of 27.030 and length of 10mm. 从分析其性能出发通过计算指出,使用BBO晶体获得倍频426nm蓝光(切割角度为27.;430,长度为10mm),虽其非线性转换系数小,但由于该晶体的损耗小,在泵浦功率约为600mW时。 理论上同样可以得到50%25的倍频转换效率。
- Three kinds of pump levels is introduced at first,through optical design optimizing the EDFA optical system is builded,then achievement of EDFA’s electronic system. 首先介绍了三种不同的泵浦结构的掺铒光纤放大器,经过光路的优化设计,最终确定了实际的光路图。
- I'd like a room on the upper level. 我想要楼上的房间。
- Blood is pumping out of his belly like a fountain. 血像喷泉似地从他的腹部涌出。
- We need a mechanical digger to level the ground. 我们需要一台挖掘机来平整土地。
- Blood was pumping out of his belly like a fountain. 血像喷泉似地从他的腹部涌出。
- Her heart was pumping very fast. 她的心脏跳得很快。
- I hope you'll be on the level with me. 我希望你对我坦率布公。
- She needs to win this point to level the score. 她要赢得这一分才能将比分扳平。
- He was pumping away the whole day. 他整天忙着用唧筒抽水。
- Keep a level head and phone the Fire Department. 保持冷静,打电话给消防署。
- A football field should be level. 足球场地应该平坦。
- The rising level of crime is a sign of the times. 犯罪率增高是这一时代的特徵。
- I have told the whole story on the level. 我已经诚实地把整个事情经过讲出来了。
- Find level ground for the picnic table. 找一处平坦的地面放野餐的餐桌。
- A tyre expands when you pump air into it. 轮胎一打气就鼓起来。
- This mountain is 1,400 meters above sea level. 这座山海拔1,400米。
- He has a level head in emergencies. 他在危急关头能镇定自若。
- If the table top isn't level, things will roll off. 如果桌面不平,东西就会滚下来。
- Lashing velocity of pump is concerned with nature of air. 泵的抽气速率与气体的性质有关。