波长激光驱动发射器

EQ-77 LDLS™ 激光驱动白光光源 Energetiq公司开发的宽带白光光源，采用激光泵浦的方式维持等离子体放电发光，避免了使用电极所带来的种种缺陷。 EQ-77 LDLS™ 激光驱动白光光源特点和优势： 辐射强度40mW/mm2.sr.nm（波长相关）-最快的测量速度 超低的噪声，优异的空间稳定性-精确的可重复的测量结果 宽波段范围（170-2100nm）的极高亮度光输出 双光束输出，或者单光束输出可选-使用更为灵活 紧凑的水冷灯室设计 超净的结构设计，提升稳定性，增长使用寿命 无电极工作，更低维护成本 电路控制的光输出，降低损耗 应用领域： 半导体检测 UV-VIS-NIR光谱 单色仪光源 光器件测试 PEEM 材料表征 高端成像 薄膜测试 EQ-77 LDLS™ 激光驱动白光光源技术参数： 光谱范围： 170nm -2100nm 大接收角 – 数值孔径 (NA): 高至0.5 典型灯泡寿命 9,000 小时. 灵活的输出接口：单光束或者双光束输出可选 灯源尺寸135.6 x 144.9 x 56 mm ，重量2.7 kg (6.0 lbs) 电源尺寸132.6 x 482.6 x 583.6 mm，重量18.8kg (41.5 lbs) EQ-77 LDLS™ 激光驱动白光光源谱分布图：

EQ-99X激光驱动白光光源 Energetiq公司开发的宽带白光光源，采用激光泵浦的方式维持等离子体放电发光，避免了使用电极所带来的种种缺陷。 EQ-99X激光驱动白光光源特点和优势： 连续激光等离子体放电 超高亮度，覆盖波段范围UV-Vis-NIR (170nm - 2100nm) 无需复合灯源（可替代氘灯/钨灯/氙弧光灯），简化光学系统 优异的空间稳定性，适于重复测量 优异的短时和长期功率稳定性，适于重复测量 超净的结构设计，提升稳定性，增长使用寿命 无电极工作，更低维护成本 应用领域： UV-VIS-NIR光谱 单色仪光源 光器件测试 显微照明 原子吸收光谱 材料表征 环境分析 气相测试 需要长灯源寿命的应用 EQ-99X激光驱动白光光源技术参数： 光谱范围： 170nm -2100nm 大接收角 – 数值孔径 (NA): 高至0.47 典型灯泡寿命 9,000 小时. 自由空间输出接口 灯源尺寸82.3 x 85.7 x 76.2 mm (3.2 x 3.4 x3.0 in) ，重量0.7 kg (1.5 lbs) 电源尺寸107 x 111 x 254 mm (4.2 x 4.4 x 10 in) (excl feet)，重量1.4kg (3 lbs) 谱分布图：

FeaturesPhotoconductive antenna THz emitter and detectorBuild-in hyper-spherical high-resistivity silicon lens0.1&ndash 3 THz spectral rangeSub-picosecond temporal resolutionApplicationsTHz time domain spectroscopyTHz imagingOptical pump-THz probe spectroscopyIntroductionThe terahertz (THz) and sub-THz frequency region (100 GHz &ndash 10 THz) of the electromagnetic spectrum bridges the gap between the microwaves and infrared. The &ldquo THz gap&rdquo is attractive because of many possible applications of terahertz radiation: absorption or reflection spectroscopy, imaging of biological and other objects, THz tomography, ultrafast pump-probe spectroscopy.Ekspla introduces the main building blocks for any THz system &ndash THz emitter and detector. THz emitter and/or THz detector consists of a microstrip photoconductive antenna fabricated on low-temperature grown GaAs (LT-GaAs) substrate pumped by ultrafast laser with shorter than 150 fs pulse duration. THz radiation is collected and collimated by integrated Si lens, mounted on X-Y stage. Photoconductive antenna geometry, parameters of the Si lens, as well as the properties of LT-GaAs epitaxial layers are optimized for highest THz radiation output efficiency while preserving optimal bandwidth. As a result, typical emitted THz radiation power exceeds 10 µ W when pumped by mode-locked Ti:S laser with 100 mW output power and 150 fs pulse duration. FWHM bandwidth of detection system exceeds 700 GHz with usable spectral range of 0.1&ndash 3 THz.THz imagingTHz radiation has an ability to penetrate deep into many organicsmaterials, which makes THz imaging attractive for imaging of biological samples. Image of the sample can be obtained by raster-scanning ofthe sample trough the focused THz beam. Sub-millimeter resolution was reported in scientific literature.THz Time Domain SpectroscopyFig. 1. THz time domain spectrosopy optical layoutThe most typical application of THz emitter and detector is THz Time Domain Spectroscopy (THz-TDS). THz-TDS setup is shown in Fig. 1. Subpicosecond pulses of THz radiation are detectedafter propagation through a sample and an identical length of a free space. A comparison of the Fourier transforms of these pulse shapes gives the absorption spectra of the sample under investigation.Pump-Probe THz ExperimentsFemtosecond lasers let to investigate ultrafast nonequilibrium dynamics in semiconductors. For this aim, optical-pump-optical-probe techniques are usually employed. In such experiments, an intense optical pump pulse is used to excite free carriers in a sample, while a weaker probe beam monitors changes in its optical properties. In contrary to the optical probe, terahertz probe pulses are non-resonant with the band gap of semiconductor under investigation and, because of this, can be used as direct probes of free-carrier dynamics avoiding numerous experimental artefacts typical for optical-pump-optical-probe systems.THz Spectroscopy KitOur &ldquo THz spectroscopy kit&rdquo contains all the components necessary to build THz-TDS system. The standard kit consists of photoconductive antenna THz emitter and detector, pump laser beam guiding optics, motorized delay line and bias power supply, THz beam guiding mirrors, sample holder and lock-in amplifier. All the components are assembled and tested on the baseplate of 60× 80 cm dimensions. The configuration of the kit can be easily modified, for example, sample holder can be mounted on motorized X-Y stage for imaging experiments.Fig. 2. THz pulse waveform (a) and spectrum (b)Typical examples of data collected are shown in Fig. 2. The THz pulse waveform and its Fourier spectrum were measured without sample inserted between emitter and detector in ambient air or argon atmosphere. The distance between emitter and detector is 30 cm.Requests for custom-made version are welcome!