【摘 要】
:
Tantalum pentoxide (Ta2O5) and ultraviolet reflective (UVR) multilayer films were deposited on quartz glass sub-strates by an electron beam evaporation system equipped with a hall ion source,respectively.The optical properties of Ta2O5 film and the UVR fi
【机 构】
:
Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanz
论文部分内容阅读
Tantalum pentoxide (Ta2O5) and ultraviolet reflective (UVR) multilayer films were deposited on quartz glass sub-strates by an electron beam evaporation system equipped with a hall ion source,respectively.The optical properties of Ta2O5 film and the UVR film under the vacuum ultraviolet irradiation were investigated.It is found that the mean transmittance of the Ta2O5 thin film decreased in the 300-500 nm region.The refractive index and extinction coeffi-cient of the single layer increased during the range of 300-1000 nm,with the variation rate of refractive index less than 1%,which is mainly due to the larger surface roughness and variation of the chemical state of Ta atoms on the surface caused by the irradiation.The mean reflectance of UVR film decreased from 96.5% to 95.4% during the range of 290-450 nm,indicating that the Ta2O5 and UVR films have excellent vacuum ultraviolet irradiation resistant prop-erties.
其他文献
针对卡塞格林太阳能聚光镜的次镜遮挡问题,提出了降低遮拦比的透镜校正法.在传统的聚光比与遮拦比计算公式的基础上,给出了校正版计算公式.选取聚光比为280,遮拦比为0.33的卡塞格林聚光镜,利用Zemax软件进行了仿真分析.结果 表明利用透镜校正法,所设计的卡塞格林聚光镜的遮拦比降低了36.36%,并且聚光镜的聚光比也得到了改善,接收器表面的光斑分布也更加均匀.
Passively Q-switched thulium doped fiber laser (TDFL) has been successfully demonstrated using gold nanoparticles(GNPs),which were embedded into polyvinyl alcohol as saturable absorber (SA).The stable self-starting Q-switched laser was generated to operat
The present study reports the titanium dioxide(TiO2)films synthesized from TiCl3 precursor on ITO glass substrates using two electrochemical techniques,namely direct electro-deposition(DE)and pulse electro-deposition(PE).The synthesis potential during the
We propose and demonstrate a simple method to accomplish arbitrary free spectral range (FSR) control of optical fre-quency combs (OFC).The approach is based on the combination of an optical tapped delay line (OTDL) structure and a phase modulator (PM).The
We propose a novel refractive index sensor based on Michelson interferometer by using double-core microfiber.Through the reflection of the end and taper of double-core fiber (DCF),the Michelson interference spectrum is formed.Owing to the structure charac
A coherent detection Doppler wind lidar(CDWL)system simulation for both ground-based and space-based platforms is established in this study by using the PcModwin and BACKSCAT software to construct an atmospheric model in autumn and winter.Based on the lig
A dual-lens-integrated distributed feedback (DFB) laser based on hybrid integration for single-mode transmitter opti-cal subassembly (TOSAs) is discussed in this paper.The alignment and fixing of the lenses are simple to manipulate and highly accurate,mak
In order to obtain excellent slow-light performance,we propose a photonic crystal waveguide (PCW) that introduces extrinsic defect rods in the center row of a complete square lattice rotated 45° counterclockwise and the second row adjacent to it.The conti
A conduction cooled high peak power,narrow linewidth,and sub-nanosecond multi-beam laser as an excellent candi-date for non-scanning lidar is demonstrated.This laser is based on master oscillator power amplifier (MOPA) scheme which consists of a pulse pum
The visible light communication (VLC) system employs large viewing divergence angle light-emitting diode (LED) to realize illumination and communication simultaneously,so the geometric loss of optical power may reach tens of decibels,moreover,considering