三段式分佈式回饋雷射之微波訊號產生分析

Abstract

我們的兩段式分佈式回饋雷射在幾年前已經被研究過，包括雷射射頻訊號的產生和特性，還有射頻線寬的降低。在過去的研究中，我們的實驗元件是單片式兩段式分佈式回饋雷射，但是現在，我們著重在新的雷射組成物上，利用三個單一雷射去封裝成單片式三段式分佈式回饋雷射。一開始，我們利用兩段式分佈式回饋雷射去分析布拉格反射鏡的對數和雷射的模態之間的關係. 在測試完之前封裝完的三段式分佈式回饋雷射還有資料分析，比較兩段式雷射我們在兩兩雷射之中設計了相似的布拉格反射鏡. 藉由分析之前的布拉格反射鏡的結構，我們設計了4.5對的磷化銦/空氣的布拉格反射鏡還有2.5對的磷化銦/空氣的布拉格反射鏡去觀察雷射的特性，然後我們想要利用主人雷射去調變射頻訊號的特性，然後發現主人雷射在4.5對的磷化銦/空氣的布拉格反射鏡的結構中，對於射頻訊號是扮演一個加熱器的角色，而這個射頻訊號是由兩個僕人雷射產生的。在另一方面，2.5對的磷化銦/空氣的布拉格反射鏡對於射頻訊號的特性提供一些有趣的現象。藉由在三個雷射之間適當的電流配置，我們可以產生可調性的射頻訊號。

Our monolithic two-section DFB laser have been researched in few years, the laser property about the RF generation and property, the reduction of RF linewidth have been reported. In previous research, our experimental device is the monolithic two-section DFB laser, but now, we focus the new formation of the lasers, using the three one section lasers packaged to monolithic three-section DFB lasers. At first, we analyze the relations between the DBR mirrors and the mode of the lasers with the two-section laser. After testing the prior three section laser and the data analysis, we design the similar DBR pairs in the two lasers. By analyzing the prior DBR structure, we design the 4.5 InP/air DBR pairs and 2.5 InP/air DBR pairs to observe the laser property, and we want to use the maser laser to modulate the RF characteristic, and founding the master play the heater on the RF which is dominantly generated by two slave lasers in terms of the 4.5 DBR pairs structure. On the other hand, the 2.5 InP/air DBR structure provide some interesting behavior for the RF properties. By suitable current allocation of the three lasers, we are able to generate the tunable RF signal.