| Summary: | 碩士 === 淡江大學 === 電機工程學系碩士班 === 95 === This thesis mainly discusses the applications of reflective optical amplifiers (RSOAs) in optical networks. In the prior WDM-PON (Wavelength Division Multiplexed Passive Optical Network) techniques, there are two kinds of light sources at the remote ONU (Optical Network Unit), i.e., injection locked Fabry-Perot laser and RSOA. The RSOA possesses greatest potential while it can be an optical amplifier, an optical detector, or an optical modulator.
After the modulated optical signal is amplified by the RSOA, the optical signal will suffer from a serious waveform distortion. In this paper, we study the improvement of waveform distortion by injecting the holding light into the RSOA.
For example, we proposed a paper whose title is “Improving the Waveform Distortion of RSOAs Using a CW Holding Light” in the domestic conference. By analyzing the characteristics of an RSOA, we designed a novel WDM-PON configuration which uses the self-seeding structure to produce a light as a holding light or an upstream light source.
Finally, we proposed a novel method for monitoring optical signal extinction ratio. This technique in the ER monitoring is able to monitor all the remote upstream signals at the central office OLT (Optical Line Terminal). In the experiment, we used a directly modulated DFB (Distributed Feedback) laser to test and verify this method.
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