The accumulation effects in high-reflectivity (HR) HfO2/SiO2 coatings under laser irradiation are investigated. The HR HfO2/SiO2 coatings are prepared by electron beam evaporation at 1 064 nm. The laser-induced damage threshold (LIDT) are measured at 1 06
全光再放大、再定时、再整形(3R)技术是未来全光通信网络的发展方向,全光时钟提取是全光3R技术的关键技术之一。随着新型相位调制格式信号的广泛应用,对新型相位调制格式信号的全光时钟提取研究引起了越来越多的关注。基于此,提出了一种基于可调谐解调器的速率可变差分相移键控非归零码(NRZ-DPSK)信号的时钟提取方法。采用自由空间光的斐索干涉仪构成可调谐解调器,将NRZ-DPSK信号转换为含有时钟分量的归零码(RZ)强度信号,调谐范围可覆盖2.5~40 Gb/s。将解调出的RZ信号注入到光纤环形激光器实现了5 G
For a fully chaotic two-dimensional (2D) microcavity laser, we present a theory that guarantees both the existence of a stable single-mode lasing state and the nonexistence of a stable multimode lasing state, under the assumptions that the cavity size is