穩定且波長可調的光纖雷射之研究

Abstract

本論文第一部分提出以半導體光放大器為基底之穩定且波長可調Sagnac迴路架構的光纖雷射，是以半導體光放大器(Semiconductor Optical Amplifier；SOA)為基底並以Sagnac迴路作為反射鏡達到單一頻率和節省耗能的環狀光纖雷射結構。在第二個部分我們將提出使用雙反射式結構單一縱模且波長可調的摻鉺光纖雷射，此乃利用一個雙反射式結構線性共振腔的摻鉺光纖雷射並運用一個被動式飽和吸收為基底(Saturated Absorber-Based；SAB)的濾波器和帶通濾波器(Tunable Bandpass Filter；TBF)來達到單一模態(SLM)的雷射輸出並且可以調變波長。第三部分提出利用Saganc迴路並輸出穩定連續的連續波之光學注入波長可調半導體雷射架構，藉由使用以Saganc迴路架構自行注入(Self-injected) Fabry-Perot雷射二極體，並藉由調整FP-LD的溫度使得波長的平移以達到這個雷射架構中連續的波長調變。第四部分提出藉由光學注入Fabry-Perot雷射二極體和反射式半導體光放大器之單一頻率和穩定的波長可調雷射並可行長距離的光纖傳輸。此四種光纖雷射架構之輸出功率、可調變之波長範圍、旁模壓抑比(Side-Mode Suppression Ratio；SMSR)和輸出穩定性皆被實驗展現和探討。

In the first part of this thesis, we proposed a stable and wavelength-tunable semiconductor optical amplifier SOA-based fiber laser with Sagnac ring configuration. Here, this fiber ring laser is SOA-based with Sagnac loop mirror to achieve single-frequency output and save energy power. In the second part, we proposed a dual reflected structure erbium-doped fiber (EDF) laser in single-longitudinal-mode (SLM) for wavelength-tuning. The dual reflected structure of EDF laser with a linear cavity employing a passive saturated absorber based (SAB) filter and tunable bandpass filter (TBF) for the SLM lasing and wavelength tuning. In the third part, we proposed a using Saganc loop of optical-injected semiconductor laser scheme for stable and continuous wave (CW) wavelength-tuning. It is by using self-injected Fabry-Perot laser diode (FP-LD) with Saganc loop scheme. And to achieve the continuous wavelength tuning, we can adjust the temperature of FP-LD for wavelength shifting in the laser scheme. In the fourth part, we proposed a stable wavelength-tuning laser in single-frequency by optical-injected FP-LD and reflective semiconductor optical amplifier (RSOA) for long fiber distance propagation. Finally, the output power, wavelength tunable range, side-mode suppression ratio (SMSR) and output stability of the four proposed laser configurations have been experimentally demonstrated and discussed.