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Research on Monolithic DBR Tunable Semiconductor Lasers

Author: ShiZuo
Tutor: YuYongLin
School: Huazhong University of Science and Technology
Course: Optical Engineering
Keywords: Dynamic Optical Network Tunable semiconductor lasers Transfer matrix method Wavelength switching
CLC: TN248
Type: Master's thesis
Year: 2008
Downloads: 131
Quote: 1
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Abstract


With the increasing demand for communication bandwidth optical network with transmission and routing functions simultaneously from a single transfer function of the static network to dynamic network evolution . Tunable semiconductor lasers has a flexible multi - wavelength selective lasing characteristics , will become important in the future optical network devices . With the deepening of the optical transmission technology research , the types of tunable lasers attendant . DBR tunable semiconductor laser , with its advantages of monolithic integration and fast switching by the widespread concern of the national R \u0026 D institutions . In this paper, using a type suitable for monolithic integration DBR tunable semiconductor lasers theoretical model , its characteristics were analyzed , mainly in the following aspects : ( 1) starting from the basic theory of semiconductor physics , semiconductor laser gain model. In a simple Fabry - Perot laser structure , for example, analysis of the threshold condition of the semiconductor laser , the longitudinal mode behavior . Multimode rate equation based on electromagnetic field theory , and discuss the semiconductor carrier and photon conversion process . Deduced on this basis, the optical output power, the method of calculation of the threshold current to lay the foundation for the study of the DBR -type tunable semiconductor lasers . (2) By comparing different tunable simulation method of a semiconductor laser , found that the transfer matrix method based on the matrix calculation is more in line with monolithic integration DBR - type tunable semiconductor laser structure characteristics . In order to better use of this method , its model algorithm described in detail, including the establishment of the transmission matrix , the combination and analysis . ( 3 ) on the basis of theoretical analysis , using the transfer matrix method , respectively, three DBR lasers and four SGDBR lasers of static tuning characteristics conducted a simulation study , including three DBR lasers lasing wavelength , output optical power and threshold value of the current of the static tuning curve as well as four SGDBR laser lasing wavelength static tuning curve . (4) using the method of combining static tuning curve and multimode rate equation , switch of three DBR , and four SGDBR laser mode characteristics were simulated and analyzed . Switching time optimization by analyzing different switching current transients process , and reduce channel crosstalk revelation .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Laser technology, the maser > Laser
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