井冈山大学学报(自然科学版)
井岡山大學學報(自然科學版)
정강산대학학보(자연과학판)
JOURNAL OF JINGGANGSHAN UNIVERSITY(SCIENCE AND TECHNOLOGY)
2014年
1期
11-14
,共4页
量子阱激光器%大信号调制%调制深度%带宽,频率啁啾
量子阱激光器%大信號調製%調製深度%帶寬,頻率啁啾
양자정격광기%대신호조제%조제심도%대관,빈솔조추
quantum-well semiconductor laser%large-signal modulation%modulation depth%transmission bandwidth%frequency chirp
本文对大功率量子阱激光器的大信号调制特性进行了参数分析。首先对量子阱激光器的传输带宽进行了对比。在不同宽度的光限制层的条件下,光限制层越窄,传输带宽越宽。其次分析了随着调制深度的变化对激光功率的影响,调制深度越小时,激光峰值不断变小。当温度升高时,对应的光子密度降低。偏置信号减小时,光子密度减小。在同频率下比较了脉冲和正弦调制信号的输出波形,输出波形相似。最后分析了啁啾效应。多量子阱激光器比单量子阱激光器中的啁啾更小。
本文對大功率量子阱激光器的大信號調製特性進行瞭參數分析。首先對量子阱激光器的傳輸帶寬進行瞭對比。在不同寬度的光限製層的條件下,光限製層越窄,傳輸帶寬越寬。其次分析瞭隨著調製深度的變化對激光功率的影響,調製深度越小時,激光峰值不斷變小。噹溫度升高時,對應的光子密度降低。偏置信號減小時,光子密度減小。在同頻率下比較瞭脈遲和正絃調製信號的輸齣波形,輸齣波形相似。最後分析瞭啁啾效應。多量子阱激光器比單量子阱激光器中的啁啾更小。
본문대대공솔양자정격광기적대신호조제특성진행료삼수분석。수선대양자정격광기적전수대관진행료대비。재불동관도적광한제층적조건하,광한제층월착,전수대관월관。기차분석료수착조제심도적변화대격광공솔적영향,조제심도월소시,격광봉치불단변소。당온도승고시,대응적광자밀도강저。편치신호감소시,광자밀도감소。재동빈솔하비교료맥충화정현조제신호적수출파형,수출파형상사。최후분석료조추효응。다양자정격광기비단양자정격광기중적조추경소。
The large-signal modulation characteristic of high-power quantum well laser is studied. Under the condition of different width of SCH, the transmission bandwidths of the quantum-well laser are compared. When SCH is narrower, the transmission bandwidth is wider. Under the large signal modulation, the laser peak is reduced with the decrease of modulation depth. When the temperature is higher, the density of photon is lower. With the reduction of bias signal, the photon density is decreasing. The pulse and sinusoidal modulation signal of the output waveform are compared, and the waveform under the same frequency is similar. Finally, we analyze the chirp effect. The multiple quantum-well laser chirps are smaller than the single quantum-well laser chirps.