本文選題：分布反饋激光器 + 波長可調(diào)　； 參考：《南京郵電大學(xué)》2015年碩士論文

【摘要】：光網(wǎng)絡(luò)技術(shù)的不斷發(fā)展對通信系統(tǒng)的光源提出了更高的要求,尤其在下一代高速大容量相干光通信系統(tǒng)中,可調(diào)諧半導(dǎo)體激光器的引入能夠有效減少系統(tǒng)冗余,降低開銷成本和提高網(wǎng)絡(luò)靈活率�？烧{(diào)諧DFB激光器由于其良好的單縱模性能而成為目前主要發(fā)展方向之一,本文通過建立基于氮化鎵的DFB激光器諧振腔二維穩(wěn)態(tài)模型,對光柵區(qū)不同結(jié)構(gòu)參數(shù)進(jìn)行模擬分析,并提出利用微驅(qū)動器實(shí)現(xiàn)激光器波長可調(diào),分析了該結(jié)構(gòu)方案的可行性,旨在為器件的設(shè)計及后期制備提供指導(dǎo)。本文首先闡述了DFB激光器基本工作原理,結(jié)合耦合波理論及介質(zhì)平板波導(dǎo)理論計算DFB激光器諧振腔關(guān)鍵結(jié)構(gòu)參數(shù)及單模輸出條件。然后利用基于有限元理論軟件COMSOL對DFB激光器的GaN諧振腔建立二維仿真模型,重點(diǎn)探討了不同光柵高度、光柵寬度及光柵周期對1550nm激光諧振峰的影響,分析了實(shí)驗(yàn)中可能出現(xiàn)的結(jié)構(gòu)參數(shù)的微小誤差對激射波長的影響,為光柵的設(shè)計和制備提供數(shù)據(jù)支撐。最后針對波長可調(diào)諧的實(shí)現(xiàn)方式,提出將基于氮化鎵的靜電梳狀微驅(qū)動器和懸空的氮化鎵自支撐共振光柵集成起來,利用懸空的自支撐氮化鎵共振光柵實(shí)現(xiàn)激光的選頻增益放大,結(jié)合硅基光微機(jī)電系統(tǒng)技術(shù)和微加工技術(shù)實(shí)現(xiàn)氮化鎵共振光柵的周期可調(diào),從而實(shí)現(xiàn)激光的波長可調(diào),靜電梳狀驅(qū)動器為光柵周期的變化提供可執(zhí)行功能。結(jié)合二維仿真模型,通過數(shù)值上的可行性分析,得到了整個C波段施加電壓與激射波長的關(guān)系,為今后設(shè)計和制備波長可調(diào)DFB激光器提供一定的參考。
[Abstract]:The continuous development of optical network technology puts forward higher requirements for the light source of communication system, especially in the next generation of high speed and large capacity coherent optical communication systems, the introduction of tunable semiconductor lasers can effectively reduce system redundancy. Reduce overhead costs and improve network flexibility. The tunable DFB laser has become one of the main development directions because of its good single longitudinal mode performance. In this paper, a two-dimensional steady-state model of the resonator based on gallium nitride is established to simulate the different structure parameters in the grating region. It is proposed that the wavelength of the laser can be adjusted by using microactuators. The feasibility of the structure is analyzed in order to provide guidance for the design and post-fabrication of the devices. In this paper, the basic working principle of DFB laser is described, and the key structure parameters and single mode output conditions of the resonator of DFB laser are calculated based on coupling wave theory and dielectric plate waveguide theory. Then, a two-dimensional simulation model of gan resonator of DFB laser is established based on finite element theory software COMSOL. The effects of different grating height, grating width and grating period on the resonance peak of 1550nm laser are discussed. The influence of the small error of the structure parameters on the emission wavelength is analyzed, which provides the data support for the design and fabrication of the grating. Finally, aiming at the realization of wavelength tunable, an electrostatic comb microactuator based on gallium nitride and a suspended gallium nitride self-supporting resonant grating are proposed. The laser frequency selective gain amplification is realized by using the suspended self-supporting gallium nitride resonance grating, and the period of the gallium nitride resonant grating is adjustable by combining the silicon based optical micro-electromechanical system technology and the micro-machining technology, thus the wavelength of the laser can be adjusted. The electrostatic comb driver provides the executable function for the change of grating period. Combined with the two-dimensional simulation model, the relationship between the applied voltage and the excitation wavelength of the whole C-band is obtained through the numerical feasibility analysis, which provides a certain reference for the design and fabrication of the wavelength adjustable DFB laser in the future.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN248

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