We propose and demonstrate the generation of wideband chaos based on a dual-mode microsquare semiconductor laser with optical feedback.By adjusting the dual-mode intensity ratio and the feedback strength,wideband chaos covering more than 50 GHz in the RF
Optical fibers have been widely applied to telecommunication,imaging,lasers,and sensing.Among the different types of fibers,photonic crystal fibers[PCFs],also called microstructured optical fibers,characterized by air holes arranged along the length of fi
This paper presents a polarization descattering imaging method for underwater detection in which the targets have non-uniform polarization characteristics.The core of this method takes the nonuniform distribution of the polarization infor-mation of the ta
We demonstrate a high-resolution frequency-modulated continuous-wave dual-frequency LIDAR system based on a mono-lithic integrated two-section[TS]distributed feedback[DFB]laser.In order to achieve phase locking of the two lasers in the TS-DFB laser,the si
电动叉车作为工业搬运车辆中的典型代表,普遍运用在沿海港口、大型车站、生产车间、仓库以及物流中心等地点,电动叉车与其他普通车辆不同,一是自身质量大,二是工作时负载变化十分频繁,多驱动叉车也随之产生.在转向过程中,若车速过高,由于侧向力的作用容易发生侧翻或侧滑事故;若车速过低,则会延长搬运时间,不利于输送的经济性.在操作空间比较狭小,需要频繁转向搬运货物的工作环境下,电动叉车经常发生安全事故.因此必须确保电动叉车运行时整车横摆与侧偏的平稳性,这是电动叉车电驱动和转向系统控制的关键问题之一.
A new phase unwrapping method based on dual-frequency fringe is proposed to improve both high accuracy and large measurement range of three-dimensional shape measurement by synthesizing the projected dual-frequency fringes obtaining higher and lower frequ
In this paper,we demonstrate a scheme to tailor both longitudinal and transverse modes inside a laser cavity and constitute an eye-safe single longitudinal mode Er ∶Y3Al5O12[Er∶YAG]vector laser.A q-plate is employed as a spin-orbital conversion element to
Photonic nanojets[PNJs]are subwavelength jet-like propagating waves generated by illuminating a dielectric microstruc-ture with an electromagnetic wave,conventionally a linearly polarized plane wave.Here,we study the donut-like PNJ produced when a circula
Two-dimensional[2D]perovskites exhibit broadband emission due to strong exciton-phonon coupling-induced self-trapped excitons and thus would find important applications in the field of white-light emitting devices.However,the available identifying methods
In this Letter,we demonstrated the switchable single-and dual-wavelength femtosecond soliton generation in single-mode Er-doped fiber lasers with the usage of carboxyl-functionalized graphene oxide[GO-COOH]saturable absorbers[SAs]for the first time,to the