本論文的研究重點包括單/雙/多波長可調式環型光纖雷射之研製，及其與注入鎖模法布里-比洛雷射二極體之應用，著重於傳輸訊號品質測試及低成本被動光網路於電視廣播之應用。首先，本文說明可調式單波長環型光纖雷射及可調式直調環型光纖雷射之研製；在可調式單波長環型光纖雷射方面: 採用半導體光放大器與環型摻鉺光纖雷射架構，探討半導體光放大器抑制低頻擾動腔模分佈雜訊之功能。此可調式環型光纖雷射之波長可調範圍涵蓋C與L波帶(1540~1604 nm)，平均輸出光功率為2.2 dBm，訊雜比大於46 dB。此外，也利用此環型光纖雷射高速調變10-Gb/s訊號，實驗測試單向下行傳輸單模光纖50公里，功率償付為0.96 dB。在可調式直調環型光纖雷射方面:研製2-kHz線寬，可調波長範圍為45 nm (1535~ 1580 nm)， 涵蓋C與L波帶，訊雜比大於38 dB，且此可調式環型光纖雷射可直調1.25-Gb/s下行訊號，並且注入鎖模法布里-比洛雷射二極體後，再直調1.25-Gb/s上行訊號於雙向存取網路之應用。傳輸25公里單模光纖後，上下行功率償付分別為0.11 dB與0.86 dB。
接著，本文利用可調式環型光纖雷射注入鎖模法布里-比洛技術，分析其傳輸訊號測試上之應用，以及整合無線訊號電視廣播與高速雙向資料傳輸之低成本被動光網路應用。
最後，本文探討雙波長可調式環型光纖雷射及多波長環型光纖雷射之研製；在雙波長可調式環型光纖雷射方面: 其架構採用半導體光放大器與環型摻鉺光纖雷射及兩個可調式光濾波器。波長可調範圍為58 nm (1547~ 1605 nm)， 涵蓋C與L波帶，功率差小於1.5 dB。此外，也利用此環型光纖雷射高速調變10-Gb/s訊號，實驗測試單向下行傳輸單模光纖25公里，功率償付為0.5 dB。在多波長環型光纖雷射方面: 其架構採用半導體光放大器與環型摻鉺光纖雷射及兩個匹配100 GHz分波多工器。可同時輸出4個波長，其旁模抑制比大於35 dB，功率差小於0.4 dB，4個波長平均可得輸出功率為-3.3 dBm。並且，利用此光纖雷射，進行高速2.5-Gb/s訊號調變且單向傳輸單模光纖25公里，實驗結果顯示其靈敏度為-27.94 dBm，功率償付為0.88 dB。

In this dissertation, the realization is presented of single-/dual-/multi-wavelength tunable fiber ring laser, which can be applied to performance testing of systems with injection-locked Fabry-Pérot laser diode (FP-LD) and television broadcasting using a low-cost passive optical network (PON). Firstly, we present the realization of tunable single-wavelength fiber ring laser and tunable directly modulated fiber ring laser. For tunable single-wavelength fiber ring laser, a tunable semiconductor optical amplifier-erbium-doped fiber (SOA-EDF) ring laser is presented, using an SOA to suppress cavity mode partition noise at low frequencies. The tunable SOA-EDF fiber ring laser has a tunable wavelength range covering both C- and L-band (1540~1604 nm). The average output power is 2.2 dBm, and optical signal-to-noise ratio (SNR) is above 46 dB. An application is shown for a 10-Gb/s single directional transmission over 50-km single mode fiber (SMF) with a power penalty of 0.94 dB. For tunable directly modulated fiber ring laser having a 2-kHz linewidth, wavelength tuning range is 45-nm (1535~1580 nm) covering both C- and L- band, optical SNR is above 38 dB, and an demonstration is shown for directly modulated 1.25-Gb/s downstream and upstream transmissions, using injection-locked FP-LD. Power penalties less than 0.11 dB and 0.86 dB are demonstrated for the simultaneously transmission over 25-km SMF. Then, we present the application of FP-LD injection-locked by tunable fiber ring laser technique to system performance testing. Moreover, a relatively-low-cost PON system is proposed for television broadcasting and high-speed bidirectional communications.
Finally, the realization of dual-/multi-wavelength fiber ring lasers is presented. A tunable dual-wavelength fiber ring laser is shown using an SOA-EDF ring laser framework and two optical tunable filters. The wavelength tuning range is 58-nm (1547~1605 nm) covering both C- and L-band, and the power equalization of the dual-wavelength outputs are less than 1.5 dB. An application is shown for a 10-Gb/s single directional transmission over 25-km SMF with a power penalty of 0.5 dB. Furthermore, a multi-wavelength fiber ring laser is demonstrated using an SOA-EDF ring laser framework and a pair of multiplexer/demultiplexer (MUX/DMUX) with a channel spacing of 0.8 nm (100 GHz) conforming to the International Telecommunication Union (ITU) grid. The lasers can generate four wavelengths simultaneously and side-mode suppression ratio (SMSR) is above 35 dB. The maximum power equalization is less than 0.4 dB and minimum average output power is above -3.3 dBm. Our experimental results show that the sensitivity is -27.94 dBm and the power penalty is 0.88 dB for the transmission of 2.5-Gb/s data over 25-km SMF.

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