同步泵浦宽可调谐范围染料激光器

报道一台微微秒宽可调谐范围染料激光器,只用一种染料溶液,调谐范围可达450埃。     

可调谐染料激光的窄谱宽输出

前言 可调谐染料激光器已被广泛地应用于激光光谱学、激光化学、同位素分离、医学和生物学等领域。在全息技术、光通讯、军事等方面染料激光器的应用也在不断扩大。在上述的许多应用中都要求有高的分辨率,而分辨率与激光输出的谱线宽度成反比。因而,如何压窄激光谱线宽度以达到提高分辨率是个很重要的课题。 使用棱镜扩束器的脉冲染料激光器,其优点是光学元件比较经济,准直容易,系统紧凑。适当地选择不同折射率的棱镜及其角度,可使染料激光输     

具有宽扫描范围的窄带染料激光器

本文叙述了一种计算机控制的具有500MHz线宽的氮激励染料激光器;这种激光器在一种染料的整个波长范围内(～25nm)可线性扫描,其误差为±25Pm。当校准器一次仅扫描一个自由光谱区域时,计算机联接光栅和校准器却能够扫描很大波长范围。文章介绍了一种近似于阶梯光栅的具有较高线性的光栅驱动装置。给出了一压电扫描校准器和一压力扫描校准器的结果。其中压力扫描校准器的稳频性已达到每周300MHz。     

可调谐连续波染料激光器

本文主要内容如下: 1.连续波可调谐染料激光器的主要特性和它在同位素分离中的重要作用;2.谐振腔原理及其最佳参数的计算;3.对影响输出功率因素的研究;4.染     

相关调谐双频染料激光器

本文根据模耦合理论而提出的双频染料激光相关调谐的原理(另文发表),利用增益相关性,设计了一种用扩束棱镜直接耦合两调谐支腔,在一只腔中采用旋转玻片实现增益,损耗比补尝的双频染料激光器,实验实现了双频染料激光稳定的相关对称     

宽范围无跳模外腔可调谐半导体激光器

具有宽调谐范围、无跳模以及高光谱纯净度的半导体激光器在超精细光谱、相干检测和光纤智能感知等领域有着重要的应用。但是受到半导体激光器固有运转特性的制约,通过传统的单片集成式半导体激光器难以获得高光谱纯净度的宽范围可调谐激光输出。因此文中采用闪耀光栅作为外腔反馈元件,单角面度半导体增益芯片作为增益介质,通过Littman-Metcalf外腔振荡结构实现了1 480～1 580 nm的宽调谐范围、无模式跳变的线宽小于98.27 kHz的激光输出,在注入电流为410 mA的条件下获得了16.95 dBm的峰值功率、全范围功率优于14.96 dBm和边模抑制比优于65.54 dB的输出。相应的实验结果表明：采用机械刻划闪耀光栅的Littman-Metcalf结构用于半导体激光器,可很大程度的改善半导体激光器的综合性能。该研究有利于推动其在提升光频域反射仪测量精度方向的应用。     

二极管激光器泵浦全固态可调谐染料激光器

新型激光染料Pyrronlethene567具有较高的荧光量子产额（），较低的三重态吸收（三重态猝灭系数，较宽的波长调谐范围（550～580nm连续可调）及良好的化学稳定性．以固态溶胶凝胶（Sol－Gel）材料为基质，将通常在液体状态下工作的激光染料固化，可以很好地保持染料活性，并实现染料激光器的小型化和固态化，具有一定的应用前景．染料激光器一般以氙灯、氩离子激光器等为泵浦源，装置庞大、激光转换效率低、引起的热效应显著．二极管泵浦激光器（DPL）是一种小型化的新型激光器件，采用二极管激光器作为泵浦源，具有转换效率高、寿命长、…     

用ADP晶体调谐染料激光器

应用物理通讯一月十五日一期的一篇文章报道了电光调谐、可调染料激光器的新技术。该技术使腔内ADP晶体的方向稍微偏差一点(~1°),提供的调谐范围和调谐速率约为早先相似方案的100倍。     

双光栅调谐窄带染料激光器

染料激光器使用双光栅调谐方法,装置十分简单,腔长可以做得很短,容易获得单模(纵模)输出,受到人们的重视.根据工作的需要,我们采用上海光学仪器厂生产的光栅,研制了这种双光栅调谐的N_2泵浦染料激光器.实验所用光路如图1所示.N_2激光器输出为100千瓦,脉宽约10毫微秒,器件长期运转表明,工作性能较稳定.聚焦透镜L用球面镜与柱面镜组合,等效焦距为8厘米.染料用国产商品若丹明6G,浓度为2.5×10~(-3)克分子/升.M为镀铝反射镜,G_1、G_2均采用上海光学仪器厂生产的闪耀光栅.`腔长为24厘米.     

A superconductive tuner with broad tuning range

The tuner discussed in this letter is a superconductive, tunable, parallel LC resonant circuit. The inductance and capacitance are varied simultaneously. A tuning range of 17:1 in frequency has been achieved within a single band. Bandwidth can be controlled by coupling control. Q's in excess of 10⁵were measured.     

Single grating period quantum cascade laser array with broad wavelength tuning range

A distributed feedback quantum cascade laser array emitting at λ∼ is reported. Utilising a ridge width dependence on emission wavelength, the array of laser ridges exhibited a tuning range in excess of 230 nm over the temperature range of 140 to 380 K. Singlemode operation with sidemode suppression ratios of / spl ges/25 dB and a combined tuning coefficient of -0.1 cm^-1 K^-1 are demonstrated.     

A reliable high average power dye laser

A pulsed dye laser using commercial xenon flashlamps in a novel pump geometry and using thyristors for switching having an average laser output power capability of 100 W is described.     

双频染料激光器的相关调谐原理

本文将模式耦合理论应用于双频染料激光器,得到了双频染料激光器的振荡条件和振荡状态图,提出了双频染料激光器的相关调谐原理,并进行了讨论.     

Liquid-phase epitaxy grown PbSnTe distributed feedback laser diodes with broad continuous single-mode tuning range

Distributed feedback (DFB) pulsed laser operation has been demonstrated in stripe geometry Pb1-xSnxTe double-heterostructures grown by liquid-phase epitaxy. The grating structure of 0.79 μm periodicity operates in first order near 780cm^-1(12.8 μm) and was fabricated prior to the liquid-phase epitaxial growth using holographic exposure techniques. These DFB lasers had moderate thresholds, 3.6 kA/cm², and the output power versus current curves exhibited a sharp turn-on free of kinks. Clean, single-mode emission spectra, continuously tunable over a range in excess of 20 cm^-1, centered about 780 cm^-1(12.8 μm), and at an average rate of 1.2 cm^-1. K^-1from 9 to 26 K, were observed. While weaker modes could at times be seen in the spectrum, substantially single-mode operation was obtained over the entire operating range and to over 10 times threshold. These observations have been shown to be in good agreement with published lead-salt parameter values and DFB theory, and significantly increase the attractiveness of the DFB structure for tunable lead-salt laser diodes.     

高效宽带混合染料激光研究

介绍了一种高效宽带的三元混合染料激光。在6.0WCuBr激光的泵浦下,无需更换染料,在590nm～670nm范围内均可获得线宽约为10nm,平均输出功率1W的染料激光,转换效率在18%以上,具有广泛的应用前景。     

A tunable waveguide CO2 laser with expanded tuning range

A method of expanding the tuning range of the CW CO₂ waveguide laser making use of a Fabry-Perot type light modulator is proposed. A preliminary experiment has been done to confirm the workability of the proposed scheme.     

Electronic wavelength tuning using acoustooptic tunable filter with broad continuous tuning range and narrow channel spacing

The use of acoustooptic tunable filters as tunable-wavelength filters in a multiwavelength network is reported. Fast ( approximately=3 mu s access time), broad, continuous tuning (1.3-1.56 mu m) and narrow channel spacing (4.5 nm) in a nine-channel distribution system were demonstrated. The combination of broad tuning range and narrow channel spacing allows channel selection in a distribution system with hundreds of wide-band wavelength-division-multiplexed channels. The wavelength switching time, measured as approximately=3 mu s, is important in many high-speed switching applications.<>     

（英）W波段InP HBT 宽带高功率压控振荡器

本文介绍了一款具有较高输出功率和宽调谐频率范围的基波压控振荡器单片集成电路。其制作工艺为f_T =170GHz,f_max =250GHz的0.8um InP DHBT工艺。电路核心部分采用了平衡式考毕兹振荡器拓扑,并在后面添加了一级缓冲放大器来抑制负载牵引效应,并提升了输出功率。DHBT的反偏CB结作为变容二极管来实现频率调谐。芯片测量结果表明,VCO的频率调谐范围为81- 97.3GHz,相对带宽为18.3 %。在调谐频率范围内最大输出功率为10.5 dBm,输出功率起伏在3.5 dB以内。在该VCO的最大调谐频率97.3 GHz处相位噪声为-88 dBc/Hz @1MHz。在目前所报道的InP HBT基VCO MMIC中,本文在如此宽的频率调谐范围内实现了最高的输出功率。     

振放交叠独立调谐的双波长染料激光器

报道了一种新型的双被长染料激光器，它的两个波长的振荡和放大通过一块半反镜的耦合而相互交叠，具有压低ASE背景和提高激光效率等多方面的优点。