摘要
本篇論文在研究大電流雷射二極體驅動電路，由於先前研究發現，利用電流脈衝方式驅動大功率之雷射二極體，相較於電流連續方式，可以有效地降低雷射二極體熱效應之影響來提高發光強度，因此本論文採用大電流且短脈衝方式驅動雷射二極體。 在本論文裡，我們針對現有雷射二極體驅動器之商用晶片進行探討，研究其電路架構並分析其優缺點，以及實際實驗量測其效能，藉此瞭解電路設計的關鍵並加以改善。 接著本論文提出新的雷射二極體驅動電路架構，其輸出之電流脈衝最高峰值可達2A而脈衝寬度小於14ns，藉由大電流且短脈衝方式來降低雷射二極體熱效應之影響並改善整體系統的功率損耗，另外，為了能夠控制雷射二極體輸出光源強弱，因此提出一個可調節電流脈衝峰值及脈衝頻率的雷射二極體驅動電路。電路使用HSPICE模擬雷射二極體驅動電路，來確認能達到設計的規格。
並列摘要
This thesis focuses on driver for laser diode with large current. According to the previous researches, compare to the method of continuous wave mode, using pulse mode for driving laser diode, which can efficiently reduce the thermal effects also increase the luminous intensity. Thus, we use large current with short pulse for driving laser diode. We also investigate commercial IXLD02SI with experimental result and using HSPICE to simulate the circuit diagram. It can help us find out the key component of the laser diode driver circuit. In this thesis, we present a laser diode driver circuit which output a maximum current of 2Amps and a minimum pulse width of 14ns. It can not only reduce the thermal effects but also improve the system power consumption. Furthermore, in order to control the luminous intensity of laser diode, a laser diode driver circuit which the pulse current and the frequency can be modulated is proposed. We use HSPICE to simulate the proposed laser diode driver circuit for verification.