美国康奈尔大学电子物理研究所研制出一种可调频率的激光发生器。这种激光器与目前只产生一种单一频率光束的激光器不同，它发生的激光波长可以在紫外线和红外线之间很宽的光学频谱范围内进行调整。它采用卜硼酸钡晶体作为激光源，激光波长由光线射入晶体的角度决定，因此，只 Electronic Cornell University Institute of Electronic Physics developed a tunable frequency laser generator. Unlike lasers currently producing only a single frequency beam, the lasers produce laser wavelengths that can be tuned over a wide optical spectral range between ultraviolet and infrared. It uses barium borate crystals as a laser source, the laser wavelength from the perspective of light into the crystal, so only