雷射二極體自1970年代被發展起來後，就在各領域中都佔有不可取代的獨特性，不管是軍事、工業、醫療、娛樂和生活方面都有其應用，而理所當然在現今的環境下效率就顯得格外重要。雷射二極體是由電流驅動的元件，可以分為連續電流驅動以及脈衝電流驅動，若以連續電流驅動雷射二極體容易因溫度問題而限制雷射二極體的發出光功率，而使用脈衝電流驅動則可以降低溫度從而使雷射二極體發出更高的光功率，因此其電光轉換效率更佳。故本論文採取降壓型轉換器搭配電流型PWM控制策略，可以使該驅動器因應不同的需求操作在連續電流驅動或著脈衝電流驅動。
本論文利用DSP感測雷射二極體電流的資訊，當降壓型轉換器操作於連續導通模式(CCM)時，利用電流型PWM，控制降壓轉換器主開關使雷射二極體電流追隨設定之命令值。因前面所提及雷射二極體應用於眾多領域，特別是在工業或軍事上，所以在此架構上加入終點預測(End Point Prediction)，使得雷射二極體可以快速追蹤設定的命令值，得到輸出電流快速響應命令值之功能。
本論文實驗數據，輸入電壓為24V、輸出以8顆快速二極體替代雷射二極體、連續電流導通時電流峰值為2A、脈衝電流模式時電流峰值為4A。最後經由實際電路量測，驗證所提出之電路功能可行性，以及終點預測機制所加速的命令追蹤時間。

Since the development of the laser diode in the 1970s, it has possessed irreplaceable uniqueness in various fields, whether it is in military, industrial, medical, entertainment, and daily life, and it is of course in today ’s environment Efficiency is extremely important. Laser diodes are elements driven by current, which can be divided by continuous current or pulse current. If using the continuous current drive laser diode is easy to limit the optical power due to temperature problems, and using pulsed current drive can lower the temperature and make the laser diode emit higher optical power, so its electro-optical conversion efficiency is better. Therefore, this paper adopts a buck converter with a current mode PWM control , which can make the driver operate in continuous current drive or pulse current drive according to different need.

This paper uses DSP to sense the laser diode current information. When the buck converter operates in continuous conduction mode (CCM), the current-mode PWM is used to control the main switch of the buck converter to make the laser diode current Follow the set command value. Because the laser diode mentioned above is used in many fields, especially in industry or military, so End Point Prediction is added to this paper, so that the laser diode can quickly track the set command value To get the function that the output current responds quickly to the command value.
The experimental data of this paper, the input voltage is 24V, the output is replaced by 8 fast diodes for the laser diode, the output current peak is 2A when working in continuous current mode, and the output current peak is 4A when working in pulse current mode. Finally, through actual circuit measurement, the feasibility of the proposed circuit function and the command tracking time accelerated by the end point prediction mechanism are verified.

摘 要 i
ABSTRACT ii
誌 謝 iv
目錄 v
圖目錄 vii
表目錄 xi
第一章 緒 論 1
1.1 研究動機與目的 1
1.2 雷射二極體應用及驅動方式 2
1.3 雷射二極體驅動器之文獻探討 4
1.4 論文大綱 12
第二章 具快速參考追蹤控制之連續與脈衝電流雷射二極體驅動器 13
2.1 系統架構 14
2.2 具快速參考追蹤之降壓型轉換器 16
2.2.1 降壓型轉換器運作原理 16
2.2.2 快速參考追蹤原理 17
2.3 電路設計 21
2.3.1 電感之設計 21
2.3.2 輸出電容之設計 22
2.3.3 回授電路之設計 23
2.3.4 元件選擇 25
2.4 補償設計 28
2.5 程式規劃與控制流程圖 31
第三章 模擬電路 33
3.1 降壓型轉換器模擬波形 34
3.2 降壓型轉換器及終點預測模擬波形 36
3.3損失分析 45
第四章 實驗結果與探討 47
4.1 穩態量測 48
4.2 快速參考追蹤量測 51
4.3 其他量測 62
第五章 結論與未來展望 69
5.1 結論 69
5.2 未來展望 69
參考文獻 70

[1]維基百科,“半導體雷射”,
https://zh.wikipedia.org/wiki/%E5%8D%8A%E5%AF%BC%E4%BD%93%E6%BF%80%E5%85%89
[2]ROHM SEMICONDUCTOR, “雷射二極體”,
https://www.rohm.com.tw/electronics-basics/laser-diodes/ld_what1
[3]I. S. Tarasov, N. A. Pikhtin, S. O. Slipchenko, Z. N. Sokolova, D. A. Vinokurov, K. S. Borschev, V. A. Kapitonov, M. A. Khomylev, A. Y. Leshko, V. Lyutetskiy, A. L. Stankevich, “High power CW(16W) and pulse(145W) laser diodes based on quantum well heterostructures,” Spectrochim. Acta Part A, vol. 66, pp.819-823, 2007.
[4] Kai-Jun Pai, “Depressing Start-Up Current Overshoot for a Laser Headlight Driver in High-Temperature and Forward Voltage Drift Conditions,” IEEE Transactions On Industrial Electronics., vol. 65, NO. 10, Oct. 2018.
[5]Weiyang Zhou and Ke Jin, “Efficiency Evaluation of Laser Diode in Different Driving Modes for Wireless Power Transmission,” IEEE Trans. Power Electron., vol. 30, NO. 11, Nov. 2015.
[6]Ming-Shian Lin, Chern-Lin Chen, and Lung-Han Peng, “A Regulated Pulse Current Driving Technique in Green Laser Synthesis With Electrical to Optical Conversion Efficiency Improvement for Mobile Projectors,” IEEE J. Display Tech., vol. 9, NO. 10, Oct. 2013.
[7] Marc T. Thompson, Member, IEEE, and Martin F. Schlecht, Senior Member, IEEE, “High Power Laser Diode Driver Based on Power Converter Technology,” IEEE Transactions On Power Electronics, vol. 12, no. 1, JAN 1997

[8]Man Siu, Philip K. T. Mok, Senior Member, IEEE, Ka Nang Leung, Member, IEEE, Yat-Hei Lam, Student Member, IEEE, and Wing-Hung Ki, Member, IEEE, “A Voltage-Mode PWM Buck Regulator With End-Point Prediction,” IEEE Transactions On Circuits And Systems, vol. 53, no. 4, APR 2006
[9]Datasheet “Toroidal Magnetic Powder Cores OD270”
[10]吳義利, “切換式電源轉換器” SEP. 2015.
[11]Datasheet “OPA695 Ultra-Wideband, Current-Feedback Operational Amplifier With Disable”
[12]Datasheet “HCPL-3180 2.5Amp Output Current, Hight Speed, Gate Driver Optocoupler”
[13] R. W. Erickson and D. Maksimovic, Fundamentals of Power Electronics. Norwell, MA: Kluwer Academic, 2001 SECOND EDITION