The Spectroscopy Focusing Array (SFA) onboard the enhanced X-ray Timing and Polarimetry observatory (eXTP) uses Silicon Drift Detectors (SDDs) at the focal plane. A simulation of the corresponding detectors is performed in this work to model the instrument responses, including the spectral and timing behaviors. It relies on the solution of the Poisson equations and the charge carrier dynamics to predict the detector performances at different X-ray incident positions. The notable features of the instrument responses are reproduced with reasonable accuracy. The simulation can be used for a variety of studies in the space mission, such as the understanding of the calibration data during on-ground tests and the verification of the scientific requirements with a certain instrument configuration. As an example, the flux limits of scientific observations are estimated in this work taking into account the pile-up and dead-time effects.

A 1.55 mu m InGaAsP-InP two-section DFB laser with a variable ridge width has been fabricated. Self-pulsations with frequencies around 3 GHz and 40 GHz are observed. The pulsation mechanisms related to the two frequencies are discussed and the tunability of generated self-pulsations is studied.

The wavefront aberrations in inertial confinement fusion (ICF) laser system consists of static aberration such as material inhomogeneous, optical figure error and assemble error and so on, and dynamics aberration such as pumping induced thermal distortion, nonlinear effect induced index fluctuation and so on. Two Years ago, an adaptive optical system with 45 correction elements was established for the wavefront control of ICF laser system. And the static aberration correction had been realized. Recently this adaptive optical system has been used to correct the lamp pumping induced thermal distortion. For the nanosecond scale pulse laser output, the directly close-loop operation of adaptive optical system is impossible. So the pre-correction method of the wavefront control has been adopted. The dynamic thermal distortion pre-correction has been realized. The system also successfully corrected the compound aberration both of static and thermal aberration. This work would be helpful for shortening the operation period of the ICF laser system.