自五年前发明了注入式(半导体)激光器后,它们得到了迅速发展,在应用(例如空间卫星通讯、计算机信息转移,甚至作为其他类型激光器的泵浦源)中显示出相当大的潜力。巴特耳(Battelle)纪念研究所哥伦布实验室的里德(F. J. Reid)认为,目前似乎有可能按需要制出能发射从紫外到红外区各种不同波长的注入式激光器。
A dual-blue light-emitting diode (LED) with asymmetric AlGaN composition-graded barriers but without an AlGaN electron blocking layer (EBL) is analyzed numerically. Its spectral stability and efficiency droop are improved compared with those of the conven
A high-sensitivity long-period fiber grating (LPFG) methane sensor that contains a compact and uniform styrene-acrylonitrile (SAN)/cryptophane A nanofilm is presented. The sensor is prepared by using an automatic dip-coater in a solution of cryptophane A,
In this manuscript, coherent polarization beam combining of four polarization-maintained fiber amplifiers is demonstrated. In each fiber amplifier, two cascaded fiber amplification stages are used to boost the output power to watt level. The compact and r