共查询到20条相似文献,搜索用时 93 毫秒
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应用深能级瞬态谱(DLTS)技术研究分子束外延(MBE)和二次液相外延(LPE)生长的InGaAs/GaAs应变层量子季阱激光器深中心行为.在MBE激光器的n-AlxGa1-xAs组分缓变层和限制层里,除众所周知的DX中心外,还观察到有较大俘获截面的深(空穴、电子)陷阱及其相互转化.这些陷阱可能分布在x从0到0.40和x—0.40的n-AlxGa1-xAs层里x值不连续的界面附近.而在LPE激光器的n-AlxGa1-xAs组分缓变层和限制层里,DX中心浓度明显减少,且深(空穴、电子)陷阱消失 相似文献
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研究开发一种准2μm高速BiCMOS工艺,该工艺采用乍对准双埋双阱及外延结构。外延层厚度2.0-2.5μm,器件间采用多晶硅缓冲层局部氧化隔离,双极器件采用多晶硅发射极晶体管。利用此工艺试制出BiCMOS25级环振,在负载电容CL=0.8pF条件下,平均门延迟时间tqd=0.84ns,功耗为0.35mW/门,驱动能力 0.62ns/pF,明显CMOS门。 相似文献
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研究开发了一种准2μm高速BiCMOS工艺,采用自对准双埋双阱及外延结构.外延层厚度为2.0~2.5μm,器件间采用多晶硅缓冲层局部氧化(简称PBLOCOS)隔离,双极器件采用多晶硅发射极(简称PSE)晶体管.利用此工艺已试制出BiCMOS25级环振电路,在负载电容CL=0.8pF条件下,平均门延迟时间tpd=0.84ns,功耗为0.35mW/门,驱动能力为0.62ns/pF.明显优于CMOS门. 相似文献
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Fathollahnejad H. Mathine D.L. Droopad R. Maracas G.N. Daryanani S. 《Electronics letters》1994,30(15):1235-1236
Vertical-cavity surface-emitting lasers (VCSELs) have been integrated onto an aluminium coated silicon substrate. The InGaAs top-emitting VCSELs were grown by molecular beam epitaxy and individual lasers were defined by high energy proton implantation. The substrate was removed by a new substrate removal process and the lasers were bonded to an aluminised silicon substrate using a Pd/Ge/InSn contact. Threshold currents below 5.5 mA and output powers of ~1 mW were obtained for 40 μm VCSELs bonded to Si 相似文献
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Y.H. Lee B. Tell K.F. Brown-Goebeler R.E. Leibenguth V.D. Mattera 《Photonics Technology Letters, IEEE》1991,3(2):108-109
Deep-red (770-nm) top-surface-emitting vertical-cavity AlGaAs lasers were fabricated and operated continuously at room temperature. An Al/sub 0.14/Ga/sub 0.86/As superlattice was used for an active-gain medium. Efficient current funneling was achieved by deep proton implantation. Continuous-wave (CW) threshold currents were 4.6 and 6.3 mA at 3.9- and 3.4-V bias for 10- and 15- mu m-diameter lasers, respectively. The maximum CW output power was >1.1 mW at room temperature without heat sink. Arrays of various top-surface-emitting lasers based on current funneling are expected to generate many applications for photonic switching, chip-to-chip communication, optical computing, and printing.<> 相似文献
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GaInAsP lateral current injection lasers have been fabricated on semi-insulating InP substrates. The lasers exhibit good lasing characteristics such as 10 mA threshold current, 10 mW maximum cw output power, and cw oscillation up to 70°C. The laser has very low capacitance of 0.5 pF at zero bias voltage. This performance shows, for the first time, that the lateral current injection laser is a promising candidate for OEIC light sources 相似文献
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Wu M.C. Chen Y.K. Kuo J.M. Chin M.A. Sergent A.M. 《Photonics Technology Letters, IEEE》1992,4(7):676-679
The authors report the high-temperature and high-power operation of strained-layer InGaAs/GaAs quantum well lasers with lattice-matched InGaP cladding layers grown by gas-source molecular beam epitaxy. Self-aligned ridge waveguide lasers of 3-μm width were fabricated. These lasers have low threshold currents (7 mA for 250-μm-long cavity and 12 mA for 500-μm-long cavity), high external quantum efficiencies (0.9 mW/mA), and high peak powers (160 mW for 3-μm-wide lasers and 285 mW for 5-μm-wide laser) at room temperature under continuous wave (CW) conditions. The CW operating temperature of 185°C is the highest ever reported for InGaAs/GaAs/InGaP quantum well lasers, and is comparable to the best result (200°C) reported for InGaAs/GaAs/AlGaAs lasers 相似文献
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Young M.G. Koren U. Miller B.I. Raybon G. Burrus C.A. 《Photonics Technology Letters, IEEE》1992,4(2):116-118
MOVPE-grown InGaAs/GaAs strained-layered lasers emitting at 0.98 μm have been fabricated using InGaAsP as an alternative to AlGaAs in the cladding layers. Semi-insulating blocked planar buried heterostructure lasers 2.5 μm wide have thresholds as low as 8 mA for 350 μm long devices. With the addition of reflective coatings, slope efficiencies of 0.67 mW/mA and output powers of 60 mW at 160 mA have been obtained 相似文献
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《Quantum Electronics, IEEE Journal of》2005,41(12):1430-1438
We present two different techniques for processing InP-based /spl lambda/=9 /spl mu/m quantum cascade lasers which improve the thermal dissipation in the device. The first process is based on hydrogen implantation creating an insulating layer to inject current selectively in one part of the active region. The second process uses a thick electroplated gold layer on the laser ridge to efficiently remove the heat produced in the active region. Each process is designed to improve heat evacuation leading to higher performances of the lasers and will be compared to a standard ridge structure from the same wafer. We give evidence that the process of proton implantation, efficient in GaAs based structures, is not directly applicable to InP based devices and we present a detailed analysis of the thermal properties of devices with an electroplated gold thick layer. With these lasers, an average power of 174 mW at a duty cycle of 40% has been measured at 10/spl deg/C. 相似文献
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High-speed InGaAsP/InP multiple-quantum-well laser 总被引:2,自引:0,他引:2
Lipsanen H. Coblentz D.L. Logan R.A. Yadvish R.D. Morton P.A. Temkin H. 《Photonics Technology Letters, IEEE》1992,4(7):673-675
The authors describe practical high-speed InGaAsP/InP lasers based on compressively strained quantum wells. Buried heterostructure lasers with threshold currents of 10 mA and slope efficiencies of 0.23 mW/mA are used. A modulation bandwidth of 20 GHz is obtained at a low drive current of 90 mA. A K factor of 0.25 ns is obtained and the intrinsic bandwidth of these lasers is estimated at 35 GHz 相似文献
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Twu Y. Karlicek R.F. Wynn J.D. Green C.A. Roxlo C.B. Wang S.J. Dutta N.K. 《Electronics letters》1989,25(16):1045-1046
The performance characteristics of quarter-wave shifted GaInAsP distributed feedback lasers emitting near 1.3 mu m are described. The quarter-wave shifted grating is fabricated on a substrate using the double-exposure holographic technique. The low reflectivity required for this quarter-wave shifted DFB laser is obtained using buried facets at both ends of the laser. The lasers have threshold current of 30 mA, quantum efficiency of 0.18 mW/mA/facet, bandwidth of 11.5 GHz at 10 mW and 10 dB chirp width of 2.5 AA under 40 mA modulation current at 5 Gbit/s.<> 相似文献
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The self-aligned selective regrowth of a GalnAsP/lnP BH laser with semi-insulating InP:Fe by atmospheric-pressure MOVPE is reported. A threshold current of 26 mA and 12mW output power at 100mA are obtained. Very low capacitance values of 3?5 pF are measured, promising excellent high-frequency performance. 相似文献