取样光栅DFB激光器

制作了取样光栅DFB激光器,比较研究了三种取样光栅的制备工艺,测试得到的取样光栅DFB激光器梳装光谱和理论计算大致吻合.     

取样光栅DFB激光器

制作了取样光栅DFB激光器，比较研究了三种取样光栅的制备工艺，测试得到的取样光栅DFB激光器梳装光谱和理论计算大致吻合.     

取样光栅DFB激光器

制作了取样光栅DFB激光器,比较研究了三种取样光栅的制备工艺,测试得到的取样光栅DFB激光器梳装光谱和理论计算大致吻合.     

1.27μm吸收型部分增益耦合MQW—DFB激光器

采用ＬＰ－ＭＯＣＶＤ和ＬＰＥ相结合，成功地研制了吸收型部分增益耦合ＭＱＷ－ＤＦＢ激光器，扫描显微镜照片显示了清晰的被掩埋的吸收型增益耦合光栅，表明光栅掩埋生长前升温过程磷烷的保护是成功的。     

基于取样光栅的DFB半导体激光器阵列研究

研究基于取样光栅的DFB激光器阵列,讨论取样光栅对波长控制的原理以及取样光栅的实现方法,并给出实验结果,实验结果表明,取样光栅可等效地实现高波长精度的DFB激光器阵列。     

增益开关DFB激光器啁啾消除技术的研究

对线性啁啾光纤光栅消啁啾技术进行了理论和数值分析,给出光纤光栅设计中的一些重要参数,并与Ｆ－Ｐ光谱窗消啁啾法和正常色散光纤消啁啾法做了比较。研究结果表明,光纤光栅的啁啾消除效果要好于其他两种方法,尤其是在消除非线性啁啾方面效果更为突出。     

高温单模工作的1.3μm应变MQW增益耦合DFB激光器

１．３μｍ应变ＭＱＷ增益耦合的ＤＦＢ激光器，在温度高达１２０℃时实现了单模和高功率工作。由于增益耦合效应，使两种布拉格模式存在着很大的模态端面损耗率，从而使激射波长保持了稳定，通过室温时的激射波长对材料益峰值的长波长侧的失谐，使阀值电流受温度的影响很小，这就有效地补偿了较高温度时的波导损耗。在某些温度范围内（取决于失谐值），能实现无限特性温度Ｔ０。     

吸收光栅增益耦合DFB—LD电路模型

本文以激光器单模速率方程为基础,针对ＤＦＢ－ＬＤ推导了光子寿命与激光器内部损耗及端面出射损耗的关系,以及端面出射光功率与平均光子密度的关系,给出吸收光栅增益耦合ＤＦＢＬＤ电路模型,用该模型研究了ＡＧ－ＧＣ－ＤＦＢ－ＬＤ的自脉动效应及影响自脉动幅度和频率的主要因素。     

含新型载流子注入光栅的1.55μm InGaAsP/InP应变多量子阱DFB激光器

本文报道了一种含新型载流子注入光栅的１．５５μｍＩｎＧａＡｓＰ／ＩｎＰ应变多量子阱分布反馈（ＤＦＢ）激光器．我们对该器件的掺杂与结构进行了优化,增强了载流子阻挡光栅的作用,得到了很强的增益耦合．利用ＬＰＥ和ＭＯＣＶＤ混合生长,在器件端面无镀膜的条件下获得了很高的单模成品率．     

1.3μm InGaAsP/InP应变多量子阱部分增益耦合DFB激光器

本文在国内首次报道了采用直接刻蚀有源区技术在应变多量子阱有源区结构基础上制作了１．３μｍＩｎＧａＡｓＰ／ＩｎＰ部分增益耦合ＤＦＢ激光器，器件采用全ＭＯＶＰＥ生长，阈值电流１０ｍＡ，边模抑制比（ＳＭＳＲ）大于３５ｄＢ，在端面未镀膜情况下器件单纵模成品率较高     

Design and performance of a complex-coupled DFB laser with sampled grating

A complex-coupled DFB laser with sampled grating has been designed and fabricated. The method uses the + 1 st order reflection of the sampled grating for laser single-mode operation. The typical threshold current of the sampled grating based DFB laser is 25 mA, and the optical output is about 10 mW at the injected current of 100 mA. The lasing wavelength of the device is 1.5385μm, which is the +1 st order wavelength of the sampled grating.     

单片集成倾斜SOA的宽可调谐取样光栅分布布拉格反射激光器

高功率和宽调谐范围的单片集成倾斜SOA的宽可调谐取样光栅分布布拉格反射激光器被成功制备。倾斜的SOA结构和端面增透膜有效的降低了端面的反射率。器件调谐范围大于38nm,波长覆盖较好,调谐范围内波长输出功率均大于9mW。     

Monolithic integration of widely tunable sampled grating DBR laser with tilted semiconductor optical amplifier

High output powers and wide range tuning have been achieved in a sampled grating distributed Bragg reflector laser with an integrated semiconductor optical amplifier. Tilted amplifier and anti-reflection facet coating are used to suppress reflection. We have demonstrated sampled grating DBR laser with a tuning range over 38 nm, good wavelength coverage and peak output powers of more than 9 mW for all wavelengths.     

氧化锌单晶DFB半导体激光器的设计与分析

基于严格耦合波理论(RCWA)和介质平板波导理论,针对光通信中的1550 nm波长,设计了一种基于氧化锌(ZnO)单晶的分布反馈式(DFB)半导体激光器的光栅结构,分析了二维电场模式图以及激射波长线宽图,得到了光栅结构的变化对其单纵模传输的影响。仿真结果表明,当光栅的周期为489 nm,占空比为50%,光栅深度为400 nm时,全局电场能量达到了8.3×107 J,光谱线宽小于0.1 。该激光器具有很好的窄线宽输出以及波长选择特性。理论分析与仿真结果基本一致为后期进行该器件的制备提供了较好的参考。     

Design and analysis of widely tunable sampled grating DFB laser diode integrated with sampled grating distributed Bragg reflector

A new widely tunable laser diode structure that requires only two tuning currents is proposed. The laser diode consists of a sampled grating distributed feedback (SGDFB) laser diode monolithically integrated with a sampled grating distributed Bragg reflector (SGDBR). The phase control sections are properly inserted between the grating bursts of the SGDBR and SGDFB sections for the discrete and continuous tuning. To confirm the feasibility of the new structure, the split-step time domain model is used. The simulation result for a particular design shows that the tuning range as wide as 27 nm is possible with side-mode suppression ratio exceeding 35 dB. Furthermore, the output power is larger than that from SGDBR laser diodes with similar parameters.     

光栅参数对折射率剖面非均匀取样光纤光栅的影响

利用传输矩阵法,数值分析了光栅参数对折射率剖面非均匀的均匀光纤光栅及取样光纤光栅的透射谱、偏振关系损耗和偏振模色散的影响。计算结果表明,均匀光纤光栅的光栅条纹可见度及光栅周期对其偏振关系损耗和偏振模色散影响很大;改变取样光纤光栅的取样周期及光栅段长度,透射谐振峰的幅度、偏振关系损耗和偏振模色散的最大值均随取样光纤光栅长度的增加而递增。与靠近中心波长的谐振峰相比,折射率剖面非均匀导致的双折射对取样光纤光栅远离中心波长的谐振峰的影响较小。     

基于可调谐DFB激光器的FBG加速度检测系统

基于分布式反馈DFB激光器的窄线宽 特性及可调谐特性,设计了自温度补 偿的光纤Bragg光栅(FBG)加速度检测系统。采用简支梁结构,设计了FBG低频加速 度传感器。通过增 加温度补偿光路,对DFB激光器的中心波长进行实时反馈控制,实现了系统对温度影响的 自补偿。实验结果表明,系统对冲击激励信号和加速度的连续激励信号均有良好的动态响应 , 系统的固有频率为25.1Hz,频率响应范围为0~400.0 Hz,加速度的最大灵敏度约为 1.89 V/m·s²,并且系统具有良好的温度稳定性。     

High performance and high reliability of 1.55-μmcurrent-blocking grating complex-coupled DFB lasers

We report the high performance and high reliability of the 1.55 μm current-blocking grating complex-coupled InGaAsP strained distributed-feedback MQW lasers. Small variation in slope efficiency, high characteristic temperature, and high side mode suppression ratio have been achieved over a wide temperature range of 20°C-90°C. From the accelerated aging test, the median life at 25°C and 5 mW is estimated to be longer than 50 years     

取样光栅分布反馈激光器阵列器件研究

采用了一种基于取样光栅原理制作多通道增益-折射率耦合型光栅的方法,成功制作了8波长分布反馈(DFB)激光器阵列,阵列中各激光器的阈值电流为30～40 mA,注入电流为100 mA时的平均输出光功率为10mW,阵列器件实现了波长的可选择性激射,相邻激光器间的频率间距为200 GHz,验证了用取样光栅方法制作DFB激光器阵列的可行性。     

基于半导体光放大器和取样光纤光栅结合Sagnac环的多波长光纤激光器

Multi-wavelength fiber ring laser based on the semiconductor optical amplifier(SOA)with sampled fiber Bragg grating(SFBG)in a Sagnac loop interferometer as the wavelength-selective filter is proposed.Four lasing wavelengths with 1.8 nm spacing have been generated stably at room temperature.The proposed laser has the advan-tages such as removal of the high-cost circulator,flexibility in channel-spacing tuning,and simple all-optical fiber configuration,which has potential applications in high-capacity wavelength-division-multiplexed(WDM)systems and mechanical sensors.