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1997 Digest of the IEEE/LEOS Summer Topical Meeting: Vertical-Cavity Lasers/Technologies for a Global Information Infrastructure/WDM Components Technology/Advanced Semiconductor Lasers and Application最新文献

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Monolithic array photoreceivers for multichannel WDM application 多通道波分复用应用的单片阵列光电接收机
S. Chandrasekhar
The late 1990s have seen the rapid progress of optical communication systems employing wavelength division multiplexing (WDM) architectures in order to exploit the enormous bandwidth offered by the optical fiber. There has been concurrent activities in the photonic component arena to find viable solutions for realizing such WDM architectures requiring multichannel transmitters and receivers. One such area where research has been focused is in array technologies. Monolithic integration has progressed sufficiently that arrays of lasers and photodetectors are being envisioned as key device components which enable novel architectures. In particular, optoelectronic integrated circuit (OEIC) photoreceiver arrays have been actively researched worldwide for such applications. Arrays of p-i-n photodetectors have been monolithically integrated with a variety of field effect transistors (FETs) and heterojunction bipolar transistors (HBTs).
20世纪90年代末,为了利用光纤提供的巨大带宽,采用波分复用(WDM)架构的光通信系统得到了迅速发展。在光子元件领域也有同步的活动,寻找可行的解决方案来实现这种需要多通道发射器和接收器的WDM架构。其中一个研究重点就是阵列技术。单片集成已经取得了足够的进展,激光阵列和光电探测器被设想为实现新架构的关键器件组件。特别是光电集成电路(OEIC)的光电接收器阵列在世界范围内得到了积极的研究。p-i-n光电探测器阵列已经与各种场效应晶体管(fet)和异质结双极晶体管(hbt)单片集成。
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引用次数: 0
Substrate effects on GaN photodetector performance 衬底对GaN光电探测器性能的影响
G.M. Smith, J. Redwing, J. Flynn, V. M. Phanse, R. Vaudo
Solar-blind UV photodetectors have a number of applications including missile detection, flame sensing, and solar UV monitoring. The III-V nitrides are ideal for these applications due to their wide bandgaps, making detectors transparent to visible and infrared radiation. There have been several publications on photoconductive GaN detectors on sapphire substrates but the effects of defect density on device performance have not been investigated. In this paper we describe the operation of GaN detectors grown by MOCVD on sapphire, SiC, and thick HVPE GaN base layers and compare the device performance of the detectors on each of these substrates.
太阳盲紫外光电探测器有许多应用,包括导弹探测、火焰感应和太阳紫外监测。III-V型氮化物是这些应用的理想选择,因为它们具有宽的带隙,使探测器对可见光和红外辐射透明。在蓝宝石衬底上的光导氮化镓探测器已经发表了一些文章,但尚未研究缺陷密度对器件性能的影响。在本文中,我们描述了在蓝宝石、SiC和厚HVPE GaN基材上MOCVD生长GaN探测器的操作,并比较了这些探测器在每种基材上的器件性能。
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引用次数: 1
A configurable wavelength demultiplexer using periodic filter chains 一种使用周期滤波器链的可配置波长解复用器
C. Lam, E. Yablonovitch
The ability to select an arbitrary wavelength out of a large set of wavelengths is important for future dense wavelength division multiple access (DWDM) systems. Current approaches use a spectrometer to demultiplex the wavelengths and use a switch at each wavelength to select or deselect that particular wavelength at the output. In a DWDM system with N wavelengths, N number of switches at each receiver need to be employed in order to select an arbitrary wavelength using the conventional approach. Since switches are active components, this is undesirable when N is large. A better scaling can be achieved if we can arrange a series of configurable filters in a way that half of the spectral energy is filtered out when the input spectrum is passed through each successive stage of the filter. So the first stage filters out half of the spectrum. The second stage filters out another half of the spectrum that is left from the output of the first stage, etc. Optical filters are usually interferometric devices which generate periodic complementary outputs at the same time, such as a Mach-Zehnder interferometer (MZI). The filters used at different stages could be MZIs for which the periodicity is controlled by varying the optical path differences between the two arms of the MZI. To generate more square like transmission functions, a periodic cavity structure in a form similar to a one-dimensional photonic crystal may be used.
从大量波长中选择任意波长的能力对于未来的密集波分多址(DWDM)系统非常重要。目前的方法是使用光谱仪来解复用波长,并在每个波长上使用开关来选择或取消选择输出的特定波长。在具有N个波长的DWDM系统中,为了使用常规方法选择任意波长,每个接收机需要使用N个开关。由于开关是活动组件,当N较大时不希望出现这种情况。如果我们可以安排一系列可配置的滤波器,当输入频谱通过滤波器的每个连续阶段时,一半的频谱能量被过滤掉,则可以实现更好的缩放。所以第一级过滤掉了一半的光谱。第二级过滤掉第一级输出中剩下的另一半频谱,以此类推。光学滤光器通常是同时产生周期性互补输出的干涉器件,如马赫-曾德干涉仪(MZI)。在不同阶段使用的滤光片可以是MZI,其周期性是通过改变MZI两臂之间的光程差来控制的。为了产生更多的方形传输函数,可以使用类似一维光子晶体形式的周期性腔结构。
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引用次数: 0
Raman spectroscopy of Mg-doped gallium nitride: shift of the A/sub 1/(LO) phonon 掺镁氮化镓的拉曼光谱:A/sub /(LO)声子的位移
J. C. Burton, S. Cohen, S. J. Lukacs, F. H. Long, S. Liang, Y. Lu, Y. Li, C. Tran
For the development of improved devices, the control and understanding of the electrical properties of nitride semiconductors is essential. Although significant progress has been made in recent years, the p-type doping of nitride semiconductors has proven to be challenging. It has been found necessary to anneal the sample after growth at moderate (700/spl deg/C-900/spl deg/C) temperatures in order to electrically activate the dopants. In order to help in the development of improved p-type doped GaN and other group III-nitrides, we have undertaken a study of the Raman spectroscopy of p-type doped GaN under a variety of processing conditions.
为了改进器件的发展,对氮化半导体电性能的控制和理解是必不可少的。虽然近年来取得了重大进展,但氮化半导体的p型掺杂已被证明是具有挑战性的。为了电激活掺杂剂,有必要在中等温度(700/spl°C-900/spl°C)下对生长后的样品进行退火。为了帮助改进p型掺杂GaN和其他iii族氮化物的开发,我们在各种加工条件下进行了p型掺杂GaN的拉曼光谱研究。
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引用次数: 0
AlGaAsSb/AlAsSb Bragg mirrors on InP for 1.3 and 1.55 /spl mu/m vertical cavity surface emitting lasers 用于1.3和1.55 /spl mu/m垂直腔面发射激光器的InP上AlGaAsSb/AlAsSb Bragg反射镜
G. Almuneau, F. Genty, L. Chusseau, S. Gaillard, N. Bertru, J. Jacquet
The AlGaAsSb system appears very suitable to elaborate high reflective DBRs with a low number of pairs operating at wavelengths of interest for telecommunications (1.3 and 1.55 /spl mu/m). Very high reflectivities of 99.2% at 1.56 /spl mu/m and for the first time 98.8% at 1.3 /spl mu/m have been obtained. We are now investigating this antimonide approach for fabricating monolithic VCSELs. Thus the elaboration of an active layer composed of InGaAs wells encapsulated within AlGaInAs barriers is under evaluation.
AlGaAsSb系统似乎非常适合制作高反射dbr,其低对数工作在电信感兴趣的波长(1.3和1.55 /spl mu/m)。在1.56 /spl mu/m处获得了99.2%的高反射率,在1.3 /spl mu/m处首次获得了98.8%的高反射率。我们现在正在研究这种制造单片vcsel的锑化方法。因此,正在评估由封装在AlGaInAs屏障内的InGaAs井组成的活性层。
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引用次数: 1
Type II quantum well and interband cascade lasers for the mid-IR 用于中红外的II型量子阱和带间级联激光器
J. R. Meyer, C. L. Felix, I. Vurgaftman, C. Lin, B.H. Yang, R.Q. Yang, S. Pei
Summary form only given. Since mid-IR (3-5 /spl mu/m) lasers tend to be bulky, inefficient, and complex at present, compact, reliable semiconductor sources will find wide use once their levels of performance become adequate. However, our modeling projects that this objective should be achievable using novel type-II quantum well lasers (T2QWLs) and type-II interband cascade lasers (T2ICLs). Here we report simulation results, along with promising preliminary experimental data.
只提供摘要形式。由于中红外(3-5 /spl μ m)激光器目前往往体积庞大,效率低下,复杂,紧凑,可靠的半导体源一旦其性能水平变得足够,将会得到广泛的应用。然而,我们的建模项目表明,使用新型ii型量子阱激光器(t2qwl)和ii型带间级联激光器(T2ICLs)应该可以实现这一目标。在这里,我们报告模拟结果,以及有希望的初步实验数据。
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引用次数: 0
Terabit switching and security enhancement in a WDM/TDM hybrid system WDM/TDM混合系统中的太比特交换与安全性增强
C. Lam, E. Yablonovitch
Development in the WDM technologies has made multi-wavelength optical sources and components available. By combining WDM mux-demux and fast electro-optic switches, a fast configurable WDM add-drop filter can be obtained. This enables using WDM with TDM in a way that each TDM time slot is also wavelength multiplexed. Hence introducing a second dimension for switching in addition to the time dimension. This also alleviates the demanding requirement on TDM as the switching throughput increases. The number of channels that can be supported in a WDM/TDM hybrid switching system is the product of the number of time slots and the number of available wavelengths. We have done preliminary analysis on the system throughput. We will present implementation considerations of the above described systems, the give the comparison on the throughput and security sides.
波分复用技术的发展使多波长光源和器件成为可能。通过将波分复用demux与快速电光开关相结合,可以得到一个快速可配置的波分复用加降滤波器。这使得使用WDM和时分复用的方式使得每个时分复用时隙也是波长复用的。因此,除了时间维度之外,还引入了用于切换的第二个维度。随着交换吞吐量的增加,这也减轻了对时分复用的苛刻要求。在WDM/TDM混合交换系统中可以支持的信道数是时隙数和可用波长数的乘积。我们对系统吞吐量做了初步的分析。我们将介绍上述系统的实现考虑因素,并在吞吐量和安全性方面进行比较。
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引用次数: 0
Long wavelength triangular shaped waveguide diode ring laser with dry etched facets 干蚀刻面长波长三角形波导二极管环形激光器
Chen Ji, J. Ballantyne
Summary form only given. Semiconductor ring lasers in unidirectional operation set up a traveling wave inside the cavity, thus avoiding the standing wave spatial hole burning effects relevant in DFB and Fabry-Perot lasers. This results in high spectral purity and hence lowering intensity noise by reducing the mode partition noise. Among the triangular square and circular ring lasers reported, the first mentioned geometry is attractive because of its inherent output coupler and demonstrated power efficiency. We report record low threshold current and large side mode suppression ratio (SMSR) for long wavelength triangular ring InGaAsP QW lasers.
只提供摘要形式。单向工作的半导体环形激光器在腔内设置了行波,从而避免了DFB和Fabry-Perot激光器中存在的驻波空间孔燃烧效应。这导致高光谱纯度,从而降低强度噪声通过减少模式分割噪声。在已报道的三角形、方形和圆形环形激光器中,第一个提到的几何形状由于其固有的输出耦合器和演示的功率效率而具有吸引力。我们报道了长波长三角形环InGaAsP QW激光器的低阈值电流和大侧模抑制比(SMSR)。
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引用次数: 0
Growth and characterization of bulk crystals, thin films and patterned structures of AlN, GaN and Al/sub x/Ga/sub 1-x/N on SiC(0001) substrates and device-related research SiC(0001)衬底上AlN、GaN和Al/sub x/Ga/sub 1-x/N的体晶、薄膜和图图化结构的生长和表征以及器件相关研究
R. F. Davis, C. Balkas, M. Bremser, O. Nam, W. G. Perry, I. Shmagin, Z. Sitar, B. L. Ward, T. Zheleva, R. Kolbas, R. Nemanich
Summary form only given. Single crystals of AlN to 1 mm thickness were grown at 1950-2250/spl deg/C on 10/spl times/10 mm/sup 2/ 6H-SiC substrates via sublimation-re-condensation. Most crystals were 0.3 mm-1 mm thick transparent layers completely covering the substrates. Raman, optical and TEM results will be presented. Single crystals of GaN were grown by subliming powders of this material under NH/sub 3/. Raman and photoluminescence results will be shown.
只提供摘要形式。在10/spl次/10 mm/sup 2/ 6H-SiC衬底上,在1950-2250/spl度/C的温度下,通过升华-再冷凝生长出厚度为1 mm的AlN单晶。大多数晶体是0.3 mm-1 mm厚的透明层,完全覆盖在衬底上。将介绍拉曼、光学和透射电镜的结果。在NH/sub / 3条件下,将该材料的粉末升华成氮化镓单晶。拉曼和光致发光结果将显示。
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引用次数: 0
A high performance continuously tunable top-emitting VCSEL 一种高性能连续可调谐顶发射VCSEL
M.Y. Li, W. Yuen, G.S. Li, C. Chang-Hasnain
In conclusion, we report the first high performance, micromechanical tunable top-emitting AlGaAs DBR VCSEL laser that continuously tunes over 20 nm, has threshold current between 0.76 mA-1.9 mA and output power 0.92 mW-1.9 mW throughout the entire tuning range. Such a top-emitting tunable structure is highly desirable for easy optical and electrical packaging and for integration with other devices. The achieved high performance of low threshold and high power renders its practical implementation extremely feasible.
总之,我们报道了第一个高性能的微机械可调谐顶发射AlGaAs DBR VCSEL激光器,该激光器连续调谐超过20 nm,整个调谐范围内的阈值电流在0.76 mA-1.9 mA之间,输出功率在0.92 mW-1.9 mW之间。这种顶发射可调谐结构对于简单的光学和电气封装以及与其他器件集成是非常理想的。所实现的低阈值、高功率的高性能,使其在实际应用中具有极大的可行性。
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引用次数: 1
期刊
1997 Digest of the IEEE/LEOS Summer Topical Meeting: Vertical-Cavity Lasers/Technologies for a Global Information Infrastructure/WDM Components Technology/Advanced Semiconductor Lasers and Application
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