由於自駕車技術需要精密的感測器去感測周遭環境，光學相位陣列(Optical phase array)光達有高穩定度與體積較小等優點。為能藉由調動波長掃描光學相位陣列出光角度，研究室曾委外製造出一批由不同波長組成的雷射陣列。此雷射陣列共有四對，每對有兩個不同波長的雷射進行串接。本論文採用波長1530奈米與1546奈米那組串接式雷射進行模擬分析，調整其結構參數使雷射達到雷射波長易於調控及較好的旁模抑制比。
研究時採用VPI Photonics and Design Suite軟體進行模擬，雷射增益層為於波長1560奈米的位置。我的研究包含調整高反射鍍膜-抗反射鍍膜與抗反射鍍膜-抗反射鍍膜的比較，波長1534.7奈米的雷射為主雷射與波長1549.7奈米的雷射為主雷射，不同增益頻寬(Gain bandwidth)的比較，不同雷射光柵耦合(κL)的比較。
在研究成果方面，輸入端使用抗反射鍍膜比全反射鍍膜的串接式雷射，波長調控性明顯較佳。在1549.7奈米雷射為主雷射，1534.7奈米雷射為僕雷射的情況下，雷射增益頻寬100奈米的雷射比雷射增益頻寬60奈米的雷射，波長會往兩者之間移動。在不同κL參數的模擬中，得出κL大於1.3雷射波長較穩定，功率與旁模抑制比較好。

Abstract
Due to the requirement for precise sensing of the surrounding environment, self-driving car technology relies on advanced sensors. Optical phase array lidar, which offers high stability and a compact size, has several advantages. To steer the emission angle by adjusting the wavelength, our research laboratory outsourced the production of a set of laser arrays consisting of different wavelengths. The laser arrays comprise four pairs, with each pair containing two lasers of different wavelengths. This thesis focuses on simulating and analyzing the laser array composed of lasers with wavelengths of 1530 nm and 1546 nm. We adjusted the device structural parameters to achieve easy wavelength control and improved side mode suppression ratio for the lasers.
The simulations were conducted using the VPI Photonics and Design Suite software. The laser gain layer is positioned at a wavelength of 1560 nm. Our study includes comparing the performance of high reflectance coating-antireflection coating and antireflection coating-antireflection coating configurations. The laser operating at a wavelength of 1534.7 nm serves as the master laser, while the laser operating at a wavelength of 1549.7 nm serves as the slave laser. We also compare the effects of different gain bandwidths and laser grating coupling coefficients (κL).
In terms of research findings, we observed that using antireflection coating instead of high-reflectance coating in the input section of the laser array significantly improves wavelength tunability. When the master laser operates at 1549.7 nm and the slave laser operates at 1534.7 nanometers, lasers with a gain bandwidth of 100 nm exhibit larger wavelength shift between the two lasers compared to lasers with a gain bandwidth of 60 nm. In our simulations with different κL parameters, we found that κL values greater than 1.3 result in more stable laser wavelengths and better power and side mode suppression ratio.

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