光折变效应
四波混频
光学
混合(物理)
色散(光学)
慢光
脉搏(音乐)
失真(音乐)
波长
非线性光学
物理
信号(编程语言)
材料科学
光电子学
光子晶体
量子力学
激光器
放大器
CMOS芯片
探测器
计算机科学
程序设计语言
作者
Nacera Bouldja,Marc Sciamanna,A. A. Grabar,Delphine Wolfersberger
摘要
The ability to delay short light pulses is a promising solution for all-optical telecommunications, but suffers from a large distortion of the delayed pulse as a consequence of the high material dispersion. In this Letter, we demonstrate the possibility to all-optically control the group delay in a photorefractive (PR) crystal by the use of the two-wave mixing (TWM) effect in the pulse regime at room temperature. Most importantly, we show that a proper choice of the pump pulse width in the TWM process enables us to slow down shorter or longer signal pulses without distortion. The technique is demonstrated both at visible (638 nm) and infrared (1064 nm) wavelengths and for slowed-down pulses with durations ranging from 10 ns up to 30 ms, hence confirming its broad applicability.
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