This technique can be used to generate time holes that are used to hide events from an observer in temporal cloaking. For 10 points each:
[10h] Name this technique that is often used to study processes on attosecond timescales. To prevent destruction of the gain medium or to stop signal distortion, this technique dispersively stretches the input before dispersively compressing it, unlike more direct counterparts.
ANSWER: chirped pulse amplification [prompt on CPA; prompt on partial answers]
[10e] Chirped pulse amplification is used to increase the power output by these devices, which produce radiation by stimulated emission.
ANSWER: lasers [or light amplification by stimulated emission of radiation]
[10m] Unlike laser gain media, parametric amplification relies on optical effects caused by higher-order components of this quantity. This quantity equals relative permittivity minus one.
ANSWER: electric susceptibility [accept electric susceptibility tensor; prompt on chi-sub-e; reject “magnetic susceptibility”; reject “magnetic susceptibility tensor”]
<Physics>