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目前,可调谐激光器是高速大容量光通信系统、波分复用、时分复用系统中的关键器件,也是光测试和快速波长交换等系统的重要光源,有着重要意义和广泛的应用前景。本文介绍了波长可调谐分布反馈(DFB)激光器及其进展。 相似文献
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可调谐激光器种类及发展趋势 总被引:1,自引:0,他引:1
可调谐激光器被美国《TELECOMMUNNICATION》评为2000年十大电信热门技术之一。可调谐激光器很可能成为全光网中的闪亮点,它对全光网络的未来起着潜在的重要作用。据YANKEE集团预测,可调谐激光器市场将由2001年的5000万美元增加到2005年的23.2亿美元。 一、可调谐激光器的种类 可调谐激光器按结构可分为四类:分布反馈(DFB) 相似文献
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近年来,单片集成的多波长激光器阵列作为波分复用(WDM)系统的理想光源而成为研究热点。通过重构-等效啁啾(REC)技术实现了一种低成本的分布反馈式(DFB)激光器阵列光源模块,采用掺铒光纤放大器(EDFA)对该激光器阵列的输出进行了光学放大,并通过PID控制程序对光源输出进行稳定化调节。光源模块中各通道激光器的中心波长间隔均匀,平均间隔为1.64 nm,波长间隔的误差小于0.2 nm。光源所输出的总光功率大于50 mW,输出光功率变化小于0.02 dBm。 相似文献
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本文提出一个新的对分布反馈(DBF)半导体激光器进行数值分析的模型,并对DFB激光器在阈值以上时的稳定性进行了分析,该模型考虑了空间烧孔效应和非线性增益效应,提出用向量法解决DFB激光器矩阵模型的数值方法,与牛顿-拉斐森(NR)法相比,向量法避免了复杂的自洽运算,节省了运算时间。文章还分析了非激光射模型存在时DFB的单模稳定性问题。本文提出的数值模型适用于各种结构的DFB激光器的特性分析。 相似文献
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单脊条形可调谐电吸收调制DFB激光器 总被引:1,自引:1,他引:0
报道了一种波长可热调谐的电吸收调制分布反馈激光器(Electroabsorptionmodulateddistributedfeedbacklaser,EML)。在激光器条形的侧面淀积一薄膜加热器,EML实现了 2 2nm的连续调谐。在调谐范围内,激光器输出功率的变化小于 3dB。采用端面有效反射率方法和耦合波理论的计算表明:采用相调制方法,可实现调谐范围达3 2nm的EML。如果热调谐与相调谐方法结合,可在较宽范围内实现波长快速调谐的EML 相似文献
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Multi-wavelength quantum well DFB laser array has been fabricated on an InP substrate by angling the active stripe at an oblique angle to the axis of the grating lines and coating a Pt/Ti thin-film heater to change the laser temperature.Owing to the oblique angle,four single-mode lasing wavelengths around 1.55μm were obtained simultaneously.By changing the working of the thin-film heater,the DFB laser can be tuned continuously beyond a range of 2 2nm with 3.8nm/W of tuning efficiency while maintaining... 相似文献
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Multi-wavelength quantum well DFB laser array has been fabricated on an InP substrate by angling the active stripe at an oblique angle to the axis of the grating lines and coating a Pt/Ti thin-film heater to change the laser temperature. Owing to the oblique angle,four sin-gle-mode lasing wavelengths around 1.55μm were obtained simultaneously. By changing the working of the thin-film heater,the DFB laser can be tuned continuously beyond a range of 2.2nm with 3. 8nm/W of tuning efficiency while maintaining a side-mode suppression ratio (SMSR) more than 30dB. 相似文献
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Stable Dual-Wavelength DFB Fiber Laser With Separate Resonant Cavities and Its Application in Tunable Microwave Generation 总被引:2,自引:0,他引:2
A single-longitudinal-mode dual-wavelength distributed feedback fiber laser with a wavelength spacing of 0.312 nm is proposed and demonstrated. Based on two spatially separated resonant cavities in a single fiber Bragg grating made by a simple method, stable dual-wavelength lasing is established. Then, a 38.67-GHz microwave signal generated by beating the two lasing wavelengths is obtained with a 3-dB bandwidth of ~6 kHz and a frequency drift <5 MHz without any feedback mechanism. As a potential application of this device, a tunable microwave source ranging from 18.67 to 58.67 GHz (with a small discontinuity) is proposed and partially demonstrated 相似文献
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A spectral linewidth of less than 98 kHz was achieved in three-section corrugation-pitch-modulated multiquantum-well distributed feedback (CPM-MQW-DFB) lasers over a tuning range of 1.3 nm, while maintaining a constant output power of 10 mW.<> 相似文献