光激射器(laser)和微波激射器(maser )这两个术语, 是可互换地用来描述产生微波、红外到可见光范围内相干电磁辐射的新型量子电子器件。这些词是“光的受激辐射放大”(light amplification of Stimulated emission of radiation）和受激辐射的“分子放大”(molecularamplifkation)两短语的英文字首缩拼, 虽然按其用法现在最好用“光激射器”称呼红外和可见光范围的器件, 用“微波激射器”称呼微波和毫米波范围的器件, 但在本文中这两个词是可
A two-section offset quantum-well structure tunable laser with a tuning range of 7 nm was fabricated using offset quantum-well method. The distributed Bragg reflector (DBR) was realized just by selectively wet etching the multiquantum-well (MQW) layer abo
An electron beam is obtained using laser wakefield electron accelerator, and converted into a \gamma-ray source after undergoing bremsstrahlung radiation in a dense material. A quasi-monoenergetic structure is observed when the length of the plasma chann
Remotely sensing an object with light is essential for burgeoning technologies, such as autonomous vehicles. Here, an object’s rotational orientation is remotely sensed using light’s orbital angular momentum. An object is illuminated by and partially obst
菲佐(Fizeau)激光波长计中光学劈尖厚度的标定是准确测量激光波长的先决条件。本文详细研究了进行光学劈尖厚度标定所需要的标定波长数目,分析结果表明:标定波长数目主要与标定波长的选择方式及光学劈尖厚度的误差范围有关。
A modified adaptive algebraic reconstruction technique (MAART) with an auto-adjustment relaxation parameter and smoothness regularization is developed to reveal the tomographic reconstruction of H2O distribution in combustion from incomplete projections.
In this study, a high-energy, temporally shaped picosecond ultraviolet (UV) laser running at 100 Hz is demonstrated, with its pulses boosted to 120 mJ by cascaded regenerative and double-pass amplifiers, resulting in a gain of more than 108. Wi