Spectral beam combination of tunable laser beams demonstrated, using a multilayer dielectric coated single cavity Fabry Perot (FP) filter. A stack of 19 layers using TiO₂ and SiO₂ was optimally designed and fabricated using an electron beam evaporation technique. This filter was characterized for transmission spectrum, surface morphology and laser induced damage threshold. The sharp transmission spectrum facilitated the spectral combination of closer wavelengths (<10 nm) around 632.8 nm. This filter was utilized as an efficient spectral beam combiner as well as an amplified spontaneous emission (ASE) filter for the transmitting wavelength. This study finds direct application for tunable, multi-wavelength laser-based differential absorption lidar (DIAL) and atmospheric remote sensing applications. The application of this device was successfully demonstrated to spectrally combine high power, tunable copper vapor laser pumped dye laser beams. A mechanism to tune the FP transmission profile along with laser beam tunability was established.

使用多层介电涂层单腔法布里·珀罗（FP）滤光片演示了可调激光束的光谱束组合。使用TiO ₂和SiO ₂的19层堆叠使用电子束蒸发技术进行了最佳设计和制造。对该滤光片的透射光谱，表面形貌和激光诱导的损伤阈值进行了表征。清晰的透射光谱促进了在632.8 nm附近更近的波长（<10 nm）的光谱组合。该滤光片被用作有效的光谱光束合成器以及用于发射波长的放大的自发发射（ASE）滤光片。本研究发现可调谐，基于多波长激光的差分吸收激光雷达（DIAL）和大气遥感应用的直接应用。该设备的应用已成功地证明了在光谱上组合了高功率，可调谐的铜蒸气激光泵浦的染料激光束。