标题: | 利用全偏振保持光纤环和主动相位调变之10 GHz锁模掺铒光纤雷射及高速光波长扫频应用 10 GHz mode-locked Er-doped fiber laser based on an all-PM fiber loop with in-loop phase modulation and the high-speed wavelength-swept application |
作者: | 洪智皓 賴暎杰 Hung, Chih-Hao Lai, Yin-Chieh 光電工程研究所 |
关键字: | 锁模雷射;掺铒光纤;光纤雷射;光波长扫频;相位调变;mode-locked laser;Er-doped;fiber laser;wavelength-swept;phase modulation |
公开日期: | 2017 |
摘要: | 本论文的研究主要是利用全偏振保持光纤环来建构锁模光纤雷射,所使用的增益介质为掺铒光纤,并在光纤环里加上相位调变器,利用相位调变器所能提供的相位调变去改变光纤环的相偏压,如此一来也能改变光纤环的穿透率,从而成功达到主动锁模。藉由适当选择相位调变器的调变频率,利用谐波锁模技术能让我们的雷射锁模在10 GHz的高脉冲重覆率。我们进一步利用可电压调控且能产生10 GHz高频的介电质共振腔共振器 (DRO) 来作为调变讯号产生器,藉由改变共振器的调变频率再透过雷射腔内的色散效应来改变锁模光波长,进而制作出能够在10 GHz高重覆率作高速扫频的掺铒光纤锁模雷射,在8.5 kHz扫频速度下扫频范围最大可以达到25 nm。 In this thesis work, we mainly utilize the polarization maintaining fibers for constructing the mode-locked fiber lasers. The gain fiber we use is the Er-doped fiber and an EO phase modulator is inserted into the optical fiber loop for active mode-locking. The travelling phase modulator can adjust the phase bias of the fiber loop and as a result, it can also change the fiber loop transmission. By suitably selecting the modulation frequency of the phase modulator, we successfully realize active mode-locking at the 10 GHz high repetition rate through the harmonic mode-locking technique. In addition, we use a voltage tuning dielectric resonator oscillator (DRO) as the 10 GHz signal generator to sweep the modulation frequency. We successfully achieve a 10 GHz high repetition rate mode-locked Er-doped fiber laser with high-speed optical wavelength sweeping capability. The widest sweep range is about 25 nm when the sweep rate is about 8.5 kHz. |
URI: | http://etd.lib.nctu.edu.tw/cdrfb3/record/nctu/#GT070450544 http://hdl.handle.net/11536/141269 |
显示于类别: | Thesis |