Monolithic electro absorption modulated distributed feedback(DFB) lasers are proposed and fabricated by using a modified double stack active layer.The 38mA threshold,9dB extinction ratio (from 0 5V to 3 0V),and ab...Monolithic electro absorption modulated distributed feedback(DFB) lasers are proposed and fabricated by using a modified double stack active layer.The 38mA threshold,9dB extinction ratio (from 0 5V to 3 0V),and about 5mW output power at the 100mA operation current are achieved.Compared with other reported results (only 1 5mW at the same operation current) of the traditional stack active structure,the proposed structure improves the output power of devices.展开更多
An electro absorption modulator is fabricated for optical network system.The strained InGaAs/InAlAs MQW shows improved modulation properties,including polarization independent,high extinction ratio (>40dB) and low...An electro absorption modulator is fabricated for optical network system.The strained InGaAs/InAlAs MQW shows improved modulation properties,including polarization independent,high extinction ratio (>40dB) and low capacitance (<0 5pF),with which,an ultra high frequency(>10GHz) can be obtained.展开更多
对分子束外延生长的 Ga NAs外延层进行了拉曼散射研究 ,观测到了由于导带中的 E+态所引起的共振散射和由此产生的布里渊区非Γ点声子的拉曼峰 .清晰地观测到了随氮含量增大 ,氮在 Ga As中的局域模振动演变为Ga NAs中的类 Ga N晶格声子带...对分子束外延生长的 Ga NAs外延层进行了拉曼散射研究 ,观测到了由于导带中的 E+态所引起的共振散射和由此产生的布里渊区非Γ点声子的拉曼峰 .清晰地观测到了随氮含量增大 ,氮在 Ga As中的局域模振动演变为Ga NAs中的类 Ga N晶格声子带模 .通过样品在 850度快速热退火前后拉曼谱的对比 。展开更多
A 1.55μm Fabry-Perot (F-P) thermo-optical t unable filter is fabricated.The cavity is made of amorphous silicon (a-Si) layer grown by electron-beam evaporation technique.Due to the excellent thermo-optical property o...A 1.55μm Fabry-Perot (F-P) thermo-optical t unable filter is fabricated.The cavity is made of amorphous silicon (a-Si) layer grown by electron-beam evaporation technique.Due to the excellent thermo-optical property of a-Si,the refractive index of the F-P cavity will be changed by heating;the transmittance resonant peak will therefore shift substantially.The measured tuning rang is 12nm, FWHM (full-width-at-half-maximum) of the transmissi on peak is 9nm,and heating efficiency is 0.1K/mW.The large FWHM is mainly due to th e non-ideal coating deposition and mirror undulation.Possible improvements to increase the efficiency of heating are suggested.展开更多
The characteristics of thickness enhancement fact or and bandgap wavelength of selectively grown InGaAsP are investigated.A high thi ckness enhancement factor of 2.9 is obtained.Spotsize converter integrated DFB las...The characteristics of thickness enhancement fact or and bandgap wavelength of selectively grown InGaAsP are investigated.A high thi ckness enhancement factor of 2.9 is obtained.Spotsize converter integrated DFB lasers are fabricated by using the technique of SAG.The threshold current is as low as 10.8mA.The output power is 10mW at 60mA without coating and the SMSR is 35.8dB.The vertical far field angle (FWHM) is decreased from 34° to 9°.The to lerance of 1dBm misalignment is 3.4μm vertically.展开更多
采用超低压(22×102Pa)选择区域生长(selective area growth,SAG)金属有机化学气相沉积(metal_organic chemical vapor deposition,MOCVD)技术成功制备了InGaAsP/InGaAsP级联电吸收调制器(electro absorption modulator,EAM)与分布...采用超低压(22×102Pa)选择区域生长(selective area growth,SAG)金属有机化学气相沉积(metal_organic chemical vapor deposition,MOCVD)技术成功制备了InGaAsP/InGaAsP级联电吸收调制器(electro absorption modulator,EAM)与分布反馈激光器(distributed feed backlaser,DFB)单片集成光源的新型光电器件.实验结果表明,采用该技术制备的器件具有良好的性能:激射阈值为19mA,出光功率为4·5mW,在5V的驱动电压下达到了20dB的消光比,器件3dB响应带宽达到了10GHz以上.应用这种新型器件,利用级联EAM的光开关效应,获得了重复率为10GHz、半高宽(full_width_at_half_maximum,FWHM)为13·7ps的超短光脉冲.展开更多
A Mach-Zehnder(MZ) electro-optic(EO) modulator are real iz ed,with three optical layers as polymer materials.The functional layer is the co rona poled crosslinkable polyurethane.The ridge waveguide is fabricated by us...A Mach-Zehnder(MZ) electro-optic(EO) modulator are real iz ed,with three optical layers as polymer materials.The functional layer is the co rona poled crosslinkable polyurethane.The ridge waveguide is fabricated by using the spin-coating,poling,photolithography and oxygen reactive ion etching(RIE) techniques.The mode and the modulation properties of these devices are demonstra ted in a micron control system,while the light source works at the wavelength of 1 31 or 1 55 micron.展开更多
利用 LP- MOCVD技术在 Ga As( 0 0 1 )衬底上生长了高质量的立方相 In Ga N外延层 .研究了生长速率对 In Ga N质量的影响 ,提出一个简单模型解释了在改变 TEGa流量条件下出现的In组分的变化规律 ,实验结果与模型的一次项拟合结果较为吻...利用 LP- MOCVD技术在 Ga As( 0 0 1 )衬底上生长了高质量的立方相 In Ga N外延层 .研究了生长速率对 In Ga N质量的影响 ,提出一个简单模型解释了在改变 TEGa流量条件下出现的In组分的变化规律 ,实验结果与模型的一次项拟合结果较为吻合 ,由此推断 ,在现在的生长条件下 ,表面单个 Ga原子作为临界晶核吸附 Ga或 In原子实现生长的模型与实际情况较为接近 .对于晶体质量的变化也给予了说明 .得到的高质量立方相 In Ga N室温下有很强的发光峰 ,光致发光峰半高宽为 1 2 8me V左右 .展开更多
用 MOCVD方法生长了 In Ga As/ In Ga As P多量子阱微碟激光器外延片 ,用光刻、干法刻蚀和湿法刻蚀等现代化的微加工技术制备出直径 9.5μm的 In Ga As/ In Ga As P微碟激光器 ,并详细介绍了整个制备工艺过程 .在液氮温度下用氩离子激...用 MOCVD方法生长了 In Ga As/ In Ga As P多量子阱微碟激光器外延片 ,用光刻、干法刻蚀和湿法刻蚀等现代化的微加工技术制备出直径 9.5μm的 In Ga As/ In Ga As P微碟激光器 ,并详细介绍了整个制备工艺过程 .在液氮温度下用氩离子激光器泵浦方式实现了低阈值光泵激射 ,测出单个微碟激光器的阈值光功率为 15 0μW,激射波长约为 1.6μm,品质因数 Q=80 0 ,激射光谱线宽为 2 nm,同时指出微碟激光器激射线宽比 F-展开更多
文摘Monolithic electro absorption modulated distributed feedback(DFB) lasers are proposed and fabricated by using a modified double stack active layer.The 38mA threshold,9dB extinction ratio (from 0 5V to 3 0V),and about 5mW output power at the 100mA operation current are achieved.Compared with other reported results (only 1 5mW at the same operation current) of the traditional stack active structure,the proposed structure improves the output power of devices.
文摘An electro absorption modulator is fabricated for optical network system.The strained InGaAs/InAlAs MQW shows improved modulation properties,including polarization independent,high extinction ratio (>40dB) and low capacitance (<0 5pF),with which,an ultra high frequency(>10GHz) can be obtained.
文摘对分子束外延生长的 Ga NAs外延层进行了拉曼散射研究 ,观测到了由于导带中的 E+态所引起的共振散射和由此产生的布里渊区非Γ点声子的拉曼峰 .清晰地观测到了随氮含量增大 ,氮在 Ga As中的局域模振动演变为Ga NAs中的类 Ga N晶格声子带模 .通过样品在 850度快速热退火前后拉曼谱的对比 。
文摘A 1.55μm Fabry-Perot (F-P) thermo-optical t unable filter is fabricated.The cavity is made of amorphous silicon (a-Si) layer grown by electron-beam evaporation technique.Due to the excellent thermo-optical property of a-Si,the refractive index of the F-P cavity will be changed by heating;the transmittance resonant peak will therefore shift substantially.The measured tuning rang is 12nm, FWHM (full-width-at-half-maximum) of the transmissi on peak is 9nm,and heating efficiency is 0.1K/mW.The large FWHM is mainly due to th e non-ideal coating deposition and mirror undulation.Possible improvements to increase the efficiency of heating are suggested.
文摘The characteristics of thickness enhancement fact or and bandgap wavelength of selectively grown InGaAsP are investigated.A high thi ckness enhancement factor of 2.9 is obtained.Spotsize converter integrated DFB lasers are fabricated by using the technique of SAG.The threshold current is as low as 10.8mA.The output power is 10mW at 60mA without coating and the SMSR is 35.8dB.The vertical far field angle (FWHM) is decreased from 34° to 9°.The to lerance of 1dBm misalignment is 3.4μm vertically.
文摘采用超低压(22×102Pa)选择区域生长(selective area growth,SAG)金属有机化学气相沉积(metal_organic chemical vapor deposition,MOCVD)技术成功制备了InGaAsP/InGaAsP级联电吸收调制器(electro absorption modulator,EAM)与分布反馈激光器(distributed feed backlaser,DFB)单片集成光源的新型光电器件.实验结果表明,采用该技术制备的器件具有良好的性能:激射阈值为19mA,出光功率为4·5mW,在5V的驱动电压下达到了20dB的消光比,器件3dB响应带宽达到了10GHz以上.应用这种新型器件,利用级联EAM的光开关效应,获得了重复率为10GHz、半高宽(full_width_at_half_maximum,FWHM)为13·7ps的超短光脉冲.
文摘A Mach-Zehnder(MZ) electro-optic(EO) modulator are real iz ed,with three optical layers as polymer materials.The functional layer is the co rona poled crosslinkable polyurethane.The ridge waveguide is fabricated by using the spin-coating,poling,photolithography and oxygen reactive ion etching(RIE) techniques.The mode and the modulation properties of these devices are demonstra ted in a micron control system,while the light source works at the wavelength of 1 31 or 1 55 micron.
文摘用 MOCVD方法生长了 In Ga As/ In Ga As P多量子阱微碟激光器外延片 ,用光刻、干法刻蚀和湿法刻蚀等现代化的微加工技术制备出直径 9.5μm的 In Ga As/ In Ga As P微碟激光器 ,并详细介绍了整个制备工艺过程 .在液氮温度下用氩离子激光器泵浦方式实现了低阈值光泵激射 ,测出单个微碟激光器的阈值光功率为 15 0μW,激射波长约为 1.6μm,品质因数 Q=80 0 ,激射光谱线宽为 2 nm,同时指出微碟激光器激射线宽比 F-
