选频特性 meaning in English

frequency-selection characteristic

The self - q - switched pulses of high erbium - doped fabry - perot cavity fiber laser are observed and theoretically analyzed . ( 2 ) . utilizing the non - linearity characteristics of single mode fiber - back stimulated brillouin scattering ( bsbs ) and the wavelength - selecting characteristics of fiber gratings , self - q - switched pulses are achieved from a linear cavity erbium - doped fiber laser pumping by a 980nm ld continue wave ( cw ) pumping , the pulse width is 2 . 2ns and the repetition frequency of pulses is 64 . 5mhz
( 2 )利用单模光纤的非线性效应背向受激布里渊散射( bsbs )和光纤光栅的选频特性,采用980nm半导体激光器连续泵浦方式,在线性腔掺铒光纤激光器中实现了自调q运转,获得脉冲宽度( fwhm )约为2 . 2ns ,重复频率为64 . 5mhz的稳定的光脉冲输出。