New group velocity dispersion measurement technique by using periodic wavelength-scanning pulse light source

• Main Author: 劉秀鳳
• Other Authors: Lai, Yin-Chieh
• Format: Others
• Language: en_US
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/44971807926759013966

碩士 === 國立交通大學 === 光電工程系所 === 97 === Group velocity dispersion (GVD) plays an important role in many applications such as high speed communication, nonlinear optics, ultrafast optical processing and other scientific researches. A new Group velocity dispersion (GVD) measurement method has been reported and demonstrated by using a periodic wavelength-scanning pulse source such as an asynchronously modelocked Er-fiber soliton laser or a frequency-shift keying (FSK) modulation light source with a RF spectrum analyzer. In the experimental work of the thesis, an asynchronous mode-locked fiber soliton laser has been used as the main light source. The laser was previously developed in our lab and is with some interesting properties including the slow periodic variation of the pulse timing position variation and the pulse central wavelength. By observing the pulse timing position variation of the pulse train before and after test fiber with the use of a RF spectrum analyzer, the group velocity dispersion of the test fiber can be inferred from the theoretical formula.