Generation And Application Of Programmable Dispersion-tuned Swept Source

Swept source is widely applied both in scientific research and daily life.In this dissertation,some typical swept sources are introduced and then we focus on a dispersion-tuned swept source.The performance of this source is discussed in detail.Then,a programmable swept source is designed and realized.What's more,as a typical application of swept source,time-stretch microscopy is introduced and two schemes are proposed to improve it.The main content of this dissertation includes:(1)Basic theory and principle of dispersion-tuned swept source is investigated.The performance is also discussed,including the linewidth,the wavelength range and the sweep rate.A laser with a wavelength range of 20 nm,a sweep rate higher than 1 kHz is realized.(2)Performance of time-stretch is discussed in theory and three limitations is pointed out,including the high acquisition bandwidth,the large temporal dispersion and the redundant data.(3)Dual-comb asynchronous optical sampling based time-stretch microscopy is demonstrated.The acquisition bandwidth is relaxed by a factor of 9200 without sacrificing the imaging quality(4)The programmable swept source is used as the laser source of time-stretch microscopy to realize a programmable microscopy.As a result,time-stretch microscopy without large temporal dispersion and high-bandwidth acquisition system is realized and data is also reduced.