ENHANCED COHERENT PHONON GENERATION BY PERIODIC EXCITATION WITH Q-SWITCHED AND MODE-LOCKED LASER-PULSES

被引：5

作者：

ISHIKAWA, K

TAKAHASHI, Y

TANAKA, U

FUKUDA, Y

HASHI, T

机构：

[1] KOBE UNIV,FAC SCI,DEPT CHEM,KOBE 657,JAPAN

[2] KOBE UNIV,FAC LIBERAL ARTS,DEPT PHYS,KOBE 657,JAPAN

来源：

OPTICS COMMUNICATIONS | 1990年 / 76卷 / 01期

关键词：

D O I：

10.1016/0030-4018(90)90561-7

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Enhanced coherent phonons (ultrasonic waves) produced by periodic excitation of transient grating with light pulses from a Q-switched and mode-locked laser were observed when the resonance condition v=nf was satisfied, where v is the phonon frequency, f the repetition frequency of the pulses and n an integer. The enhancement was observed for phonons with frequencies from 81.8 MHz to 654 MHz, and the maximum enhancement was about 100 in intensity. The dynamics involved was analyzed by developing the theory conforming to our experimental condition. Sound velocities and phonon intensities were measured in ethanol etc. containing a small amount of dye. © 1990.

引用

页码：81 / 88

页数：8