论文部分内容阅读
深紫外相干光源的最新进展
【机 构】
:
中国科学院理化技术研究所,北京100190
【出 处】
:
激光与光电子学进展
【发表日期】
:
2010年47期
其他文献
Mutual optical format conversion between on-off keying and binary phase-shift keying based on stimul
We propose and experimentally demonstrate mutual optical format conversion between signals characterized as 10-Gb/s nonreturn-to-zero on-off-keying (NRZ-OOK) and NRZ binary phase-shift keying (BPSK) types. The conversion is based on stimulated Brillouin
光学微腔光频梳(Optical Frequency Comb,OFC)具有阈值低、结构紧凑以及易于芯片集成等优势,在精密光谱测量和原子钟等研究领域具有非常好的应用前景。尽管关于OFC的研究已经取得丰富的成果,但大多数OFC具有稀疏的梳齿模式,不利于OFC的调谐。鉴于此,利用高品质因子光学微泡谐振腔的欧姆热实现OFC的调谐。首先理论上分析微腔色散原理,并计算微腔色散参量与微泡谐振腔尺寸的关系。然后制备直径为275 μm和品质因子高达1.2×10 8的微泡谐振腔,在反常色散区通过连续激光
We report a simple approach to amplify Ti:sapphire femtosecond pulses to moderate energy levels by a chirped regenerative amplifier. The seed pulses are broaden naturally because of the material dispersion of system components in regenerative cavity. The
A tunable dual-wavelength fiber Bragg grating (FBG) laser based on a distributed feedback (DFB) laser injection is proposed and experimentally demonstrated. The wavelength spacing can be tuned by adjusting the operation temperature of the DFB laser. When
期刊
Enhanced fourth-power algorithm for phase estimation with frequency separation in direct-detection o
The optical orthogonal frequency division multiplexing (OFDM) signal is affected by impairments introduced by electrical filters and optical chromatic dispersion. An enhanced fourth-power algorithm for phase estimation with frequency separation is used to
研究了大功率底发射垂直腔面发射激光器(VCSEL)单管器件光束质量,分析了电流、出光孔径、衬底厚度等因素对M2因子、远场发散角、近场及远场光强分布等的影响。使用有限元的方法对不同电极及不同氧化孔径时有源区中电流密度的分布进行了计算,为了获得高功率、高光束质量的VCSEL器件,选择氧化孔径为650 μm以及P面电极直径为580 μm,在对电流进行有效限制的同时实现了有源区中电流密度的均匀分布,从而抑制远场光斑中边模的产生,改善了光束质量。
The interfacial Si nano-pyramid-enhanced electroluminescence (EL) of an ITO/SiOx/p-Si/Al metal-oxide-semiconductor (MOS) diode with turn-on voltage of 50 V, threshold current of 1.23 mA/cm2, output power of 16 nW, and lifetime of 10 h is reported.
在时敏目标精确打击、导弹预警、光学遥感和测绘等应用过程中,光学载荷成像定位精度是最为重要的性能指标之一。光学载荷成像变换过程可以等效为目标点到像点的坐标变换过程。提出了一种基于成像链路分解与有限差分的光学载荷成像定位建模和分析方法。分析了典型光学载荷成像链路的组成,定义了成像变换坐标系统,分析了坐标系之间的变换关系;基于光学载荷成像模式,建立了光学载荷通用成像定位模型;提出了基于有限差分的光学载荷
Due to the directionality of light, the hidden device problem and the obstruction cannot be ignored for carrier sense multiple access with collision avoidance (CSMA/CA)-based uplink visible light communication (VLC). In this paper, we introduce multipacke
期刊