Broadband light generation using a relatively weak Raman mode in lead tungstate crystal

摘要

We obtain broadband generation in a Raman-active crystal lead tungstate (PbWO4) by selectively exciting a relatively weak Raman mode using two femtosecond laser pulses. A third probe beam is used to identify the Raman mode being excited and to measure the coherence decay time of the two simultaneously excited strong Raman modes in the crystal.