Ultra-broadband phase-matching ultrashort-laser-pulse measurement techniques

Pulse measurement;Ultrafast;Transient grating

Lee, Dongjoo ; Physics

University:Georgia Institute of Technology

Department:Physics

关键词: Pulse measurement;    Ultrafast;    Transient grating;   

Others  :  https://smartech.gatech.edu/bitstream/1853/16219/1/Lee_Dongjoo_Phd_200708.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

In the past several decades the technology for the creation and use of ultrashort pulses has progressed tremendously. Now, it is possible to generate laser pulses as short as a few femtoseconds in duration, and such pulses have been used for a wide range of applications. In addition, the means of measuring these pulses has progressed so rapidly. However, despite recent great advances in ultrashort-pulse measurement techniques, much remains to be done. In particular, pulse-measurement devices have relatively small wavelength-tuning ranges, and the phase-match is problematic for the pulses with a wide bandwidth such as supercontinuum. In this thesis, I will demonstrate a new pulse measurement technique which can phase-match ultra-broad bandwidth of super-continuum using transient grating frequency-resolved-optical-gating (TG FROG). Also, I will demonstrate a simplified device which can measure the UV ultra-short pulse using transient grating process, one of the third-order nonlinearity and can cover from UV to IR with the same arrangement.