It is illustrated that the effective emitting area increase over time at the beginning of emission.
结果表明，在起始的一定时间内，阴极有效发射面积随时间的增加而增大。
Sandwich transducer with composite horn combines the advantage of high power of sandwich transducer and the benefits of broad beamwidth of piston like transducer with small emitting area.
夹心式复合变幅杆换能器结合了夹心式换能器的大功率容量和小尺寸活塞换能器波束宽度大的特点，因此该换能器同时兼有宽波束和高发射响应的优点。
A method for the high efficient power coupling of large emitting area pulsed semiconductor laser and standard communication fiber is given and its measured coupling efficiency is up to 21%.
给出一种实现大发光面脉冲半导体激光器与标准通信光纤的高效耦合方案，实测耦合效率达21％。
A method for the high efficient power coupling of large emitting area pulsed semiconductor laser and standard communication fiber is given and its measured coupling efficiency is up to 21%.
给出一种实现大发光面脉冲半导体激光器与标准通信光纤的高效耦合方案，实测耦合效率达21％。
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