共查询到19条相似文献,搜索用时 62 毫秒
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热键合双包层平板波导激光器的研究进展 总被引:1,自引:0,他引:1
介绍了热键合双包层平板波导激光器的研究进展,包括热键合技术的优越性,双包层平板波导的新思想,集成可饱和吸收体的被动调Q波导激光器。 相似文献
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研究了采用离子交换和电场辅助退火法制作的铒镱共掺磷酸盐波导放大器的增益特性,测量了Er2O3,Yb2O3掺杂浓度分别为2.2wt%和4.7wt%,长度为1.2cm的器件增益,在130mW,976nm泵浦光泵浦下,输入信号光功率小于1mW时,在1535nm处得到8.5dB的小信号相对增益;当泵浦功率为30mW时,可观测到绿色的上转换辐射光,发光强度随泵浦功率增加而增大;通过单色仪和光电倍增管接收此光,确定是铒粒子由2H11/2和4S3/2能级分别跃迁至基态的上转换辐射光. 相似文献
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1.5 m LD泵浦铒玻璃被动调Q微型激光器是目前军事激光测距的研究热门,获得较高的激光单脉冲能量尤为重要。对以波长为940 nm的二极管激光器作为泵浦源,Er3+/Yb3+共掺磷酸盐玻璃作为增益介质,Co2+:MgAl2O4作为调Q晶体的微型化激光器进行了实验研究。为获得LD抽运铒镱共掺磷酸盐玻璃被动调Q微型激光器的最佳能量输出条件,分析了影响LD泵浦被动调Q激光器输出单脉冲能量的因素,并对影响被动调Q微型激光器输出能量的泵浦条件,增益介质长度,输出镜反射率等参数进行了多组实验优化,最终获得了波长1.535 m,单脉冲能量113 J,脉宽6 ns,重复频率10 Hz,光束质量为1.2的稳定人眼安全激光输出。 相似文献
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铬镱铒共掺磷酸盐玻璃光谱和激光性质研究 总被引:1,自引:1,他引:1
测定了Cr14 - 05铬镱铒共掺磷酸盐玻璃的主要热光参数,并测试了吸收、荧光光谱和激光性能等。结果表明该玻璃具有较好的光谱和热光性质,其激光输出性能可满足人眼安全激光测距光源应用的要求。 相似文献
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铒镱共掺磷酸盐基阵列波导激光器的研究进展 总被引:1,自引:0,他引:1
简要介绍了铒镱共掺磷酸盐波导激光器发展历史,描述了铒镱离子能级结构、激光机制及其影响因素以及磷酸盐激光玻璃的特性,具体阐述了铒镱共掺磷酸盐 波导激光器阵列的研究现状、制作方法、物理结构与运作特性以及用作光纤通信光源时与分布反馈半导体激光器相比的独特优势,指出了其在未来波分复用光通信系统中的应用价值. 相似文献
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Xiuli Zhao Y.Z. Xu C. Li 《Photonics Technology Letters, IEEE》2003,15(3):398-400
For the first time, we derive an analytical form of the thermal-induced strain equation for the waveguide core layer in an optical planar waveguide, which is based on elastic interaction theory in multilayered isotropic structures off the edges by thin-film approximation. This derived equation addresses how material and structural characteristics affect the magnitude and the distribution of the strain. By this equation, the strain-induced birefringence can be reduced or eliminated by proper waveguide design. 相似文献
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A thermal evaporation source provides a vapour stream of metallic dopant directed at a glass substrate. The metal atoms thermally diffuse into the glass surface and are accelerated through the substrate by an electric field. The doped glass forms an optical waveguide stripe. 相似文献
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用Cu离子交换技术,制备了soda-lime玻璃平面光波导。通过棱镜耦合技术测量了波导的有效折射率,用反WKB方法拟合得到了平面波导的折射率分布。研究发现,离子交换时间和温度2个可控的制备参数对制备的玻璃平面波导特性有较大影响,随着离子交换时间和温度的增加,波导的模式数和波导深度并非随之单调增加,波导模式数随着离子交换时间的增加先增加而后减小,而适当的离子交换时间可以使制备的波导具有最大的模式数和波导深度,且在该条件下增加离子交换温度可以提高Cu离子交换波导的蓝-绿发光强度,宽带发光中心波长在520 nm附近,发光强度取决于样品中Cu+的浓度以及Cu2+的影响。 相似文献
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In this paper the experimental results of diffusion studies and modal characterization of Ag+-Na+exchanged glass waveguides are presented. Empirical relations between the process and the device parameters are derived and subsequently used to formulate a systematic procedure for fabricating single- and multimode waveguides. 相似文献
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Fabrication of SiO2-TiO2 glass planar optical waveguides by flame hydrolysis deposition 总被引:6,自引:0,他引:6
Low-loss SiO2TiO2 planar waveguides of 0.1 dB/cm have been fabricated by flame hydrolysis deposition suitable for mass-production. A CO2 laser was used to make a stripe waveguide structure for loss measurements. 相似文献
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A simple analytical method is presented which improves upon the Hermite-Gauss field proposed by S.K. Korotky et al. (1982) for diffused waveguides by taking into account the evanescent field in the cover region. The method is used to analyze the propagation characteristics of diffused planar and channel waveguides 相似文献
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Fertig N George M Klau M Meyer C Tilke A Sobotta C Blick RH Behrends JC 《Receptors & channels》2003,9(1):29-40
We have developed planar glass chip devices for patch clamp recording. Glass has several key advantages as a substrate for planar patch clamp devices. It is a good dielectric, is well-known to interact strongly with cell membranes and is also a relatively in-expensive material. In addition, it is optically neutral. However, microstructuring processes for glass are less well established than those for silicon-based substrates. We have used ion-track etching techniques to produce micron-sized apertures into borosilicate and quartz-glass coverslips. These apertures, which can be easily produced in arrays, have been used for high resolution recording of single ion channels as well as for whole-cell current recordings from mammalian cell lines. An additional attractive application that is greatly facilitated by the combination of planar geometry with the optical neutrality of the substrate is single-molecule fluorescence recording with simultaneous single-channel measurements. 相似文献
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Planar graded index optical waveguides have been formed by K+ ion exchange in BK7 optical glass and Pyrex glass. Measurements of the mode indexes have been made and are well described by the WKB dispersion relation with a complementary error function refractive index profile for both glass types with refractive index changes (Delta n ) of 0.0094 and 0.0073 for BK7 and Pyrex, respectively. A linear relation was found between the diffusion depth and the square root of the diffusion time for both materials, and effective diffusion coefficients were calculated. Diffusion times necessary to achieve a desired number of modes and diffusion depths have also been established. 相似文献
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Analysis of single mode inhomogeneous planar waveguides 总被引:1,自引:0,他引:1
A new method for obtaining the propagation characteristics of single mode inhomogeneous planar waveguides is presented. The method is based on the scalar variational principle and a new trial field-the cosine-exponential field-is proposed. A comparison with other methods and the exact numerical results shows that our method is much more accurate than the existing methods. The method also allows one to define an equivalent slab waveguide which is then used to obtain an accurate approximation for the propagation constant of the TM0 -mode. 相似文献