Troubleshooting ultrashort pulse measurement: the coherent artifact and other issues

Ultrafast optics;Ultrashort pulse measurement

Rhodes, Michelle Ann ; Trebino, Rick Physics Curtis, Jennifer Uzer, Turgay Raman, Chandra Perry, Joseph ; Trebino, Rick

University:Georgia Institute of Technology

Department:Physics

关键词: Ultrafast optics;    Ultrashort pulse measurement;   

Others  :  https://smartech.gatech.edu/bitstream/1853/58132/1/RHODES-DISSERTATION-2016.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

Theoretical limitations of several ultrashort pulse measurement techniques are investigated. Particular attention is paid to the consequences of averaging over many pulses of different shapes. Averaging over many pulses is a very common practice, and if the pulse shape varies then the measurement result will be incorrect. This issue, referred to as a coherent artifact, is simulated for frequency-resolved optical gating using several nonlinearities, spectral interferometry for direct electric field reconstruction, two-dimensional spectral shearing interferometry, self-referenced spectral interferometry using cross-polarized wave generation, and multiphoton intrapulse interference phase scan. The role of measurement feedback in identifying pulse-shape instability is explored where possible. Several techniques receive additional analysis, such as searching for ambiguities or simulating convergence conditions. In addition, a method for intuitively displaying spatiotemporally distorted pulses is explored and developed.