共查询到17条相似文献,搜索用时 93 毫秒
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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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提出一种新的基于电吸收调制器(EAM)的非相干可调谐光子滤波器。首先通过带通滤波器滤除EAM输出的一个边带,获得单边带调制;再通过调谐EAM的偏置端,使得边带所引入的相移随着偏置电压的改变而改变,这样就可以实现一个真相移(TPS)结构;然后引入另一个非相干光源和Mach-Zender调制器(MZM),利用两路信号的延时不同实现一个基本的滤波器;最后通过调谐偏置所引入的TPS实现滤波器的宽带可调谐,而滤波器的形状可以保持不变,其中滤波器的调谐范围由偏置所引入相移的变化范围来决定。 相似文献
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A Wavelength Tunable DBR Laser Integrated with an Electro-Absorption Modulator by a Combined Method of SAG and QWI 总被引:1,自引:0,他引:1
Zhang Jing Li Baoxi Zhao Lingjuan Wang Baojun Zhou Fan Zhu Hongliang Bian Jing Wang Wei 《半导体学报》2005,26(11):2053-2057
We report a wavelength tunable electro-absorption modulated DBR laser based on a combined method of SAG and QWI.The threshold current is 37mA and the output power at 100mA gain current is 3.5mW.When coupled to a single-mode fiber with a coupling efficiency of 15%,more than a 20dB extinction ratio is observed over the change of EAM bias from 0 to -2V.The 4.4nm continuous wavelength tuning range covers 6 channels on a 100GHz grid for WDM telecommunications. 相似文献
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Jae‐Sik Sim Sung‐Bock Kim Yong‐Hwan Kwon Yong‐Soon Baek Sang‐Wan Ryu 《ETRI Journal》2006,28(4):533-536
A distributed Bragg reflector (DBR) laser and a high speed electroabsorption modulator (EAM) are integrated on the basis of the selective area growth technique. The typical threshold current is 4 to 6 mA, and the side mode suppression ratio is over 40 dB with single mode operation at 1550 nm. The DBR laser exhibits 2.5 to 3.3 mW fiber output power at a laser gain current of 100 mA, and a modulator bias voltage of 0 V. The 3 dB bandwidth is 13 GHz. A 10 Gbps non‐return to zero operation with 12 dB extinction ratio is obtained. A four‐channel laser array with 100 GHz wavelength spacing was fabricated and its operation at the designed wavelength was confirmed. 相似文献
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A novel integrated laser, that is, a distributed reflector laser diode integrated with an electroabsorption modulator, is proposed to improve the output efficiency, single‐mode stability, and chirp. The proposed laser can be realized using the selective metalorganic vapor phase epitaxy technique (that is, control of the width of the insulating mask), and its fabrication process is almost the same as the conventional electroabsorption modulated laser (EML) process except for the asymmetric coupling coefficient structure along the cavity. For our analysis, an accurate time‐domain transfer‐matrix‐based laser model is developed. Based on this model, we perform steady‐state and large‐signal analyses. The performances of the proposed laser, such as the output power, extinction ratio, and chirp, are compared with those of the EML. Under 10‐Gbps NRZ modulation, we can obtain a 30% higher output power and about 50% lower chirp than the conventional EML. In particular, the simulation results show that the chirp provided by the proposed laser can appear to have a longer wavelength side at the leading edge of the pulse and a shorter wavelength side at the falling edge. 相似文献
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A semiconductor optical amplifier and electroabsorption modulator monolithically integrated with a spot-size converter input and output is fabricated by means of selective area growth,quantum well intermixing,and asymmetric twin waveguide technology.A 1550~1600nm lossless operation with a high DC extinction ratio of 25dB and more than 10GHz 3dB bandwidth are successfully achieved.The output beam divergence angles of the device in the horizontal and vertical directions are as small as 7.3°×18.0°,respectively,resulting in a 3.0dB coupling loss with a cleaved single-mode optical fiber. 相似文献
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一种实用化的高功率低噪声波长连续可调光纤激光器 总被引:5,自引:4,他引:1
报道了一种基于光纤光栅 (FBG)的高功率可调谐环形腔掺铒光纤激光器。该激光器由 980nm激光二极管(LD)抽运 ,在 15 6 2nm波段获得了线宽小于 0 0 4nm的激光输出 ,调谐范围可达 4 6nm ,输出波长复现性误差小于 0 0 8nm。由于铒光纤选择了最佳长度 ,并在光纤环路中引入两个隔离器抑制噪声 ,提高了信噪比 ,激光器输出的最大功率可达 4 2 8mW ,此时功率稳定性为± 0 0 3dB ,斜率效率为 7 3%。 相似文献