红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2013年
2期
339-343
,共5页
汪之国%龙兴武%王飞%谭中奇
汪之國%龍興武%王飛%譚中奇
왕지국%룡흥무%왕비%담중기
背向散射%环形腔%峰值半宽
揹嚮散射%環形腔%峰值半寬
배향산사%배형강%봉치반관
backscatter%ring cavity%full width at half maximum
研究了连续激光注入时无源环形腔的背向散射特性.首先,分析了注入光与无源腔频率完全匹配时,正向光和背散光振幅的稳态解,以及充光和快速关断过程中正向光和背散光振幅随时间的演化.其次,推导了无源腔中正向光和背向散射光的峰值半宽.最后,讨论了正向光和背散光随注入光频率扫描速度的变化.发现在环形腔中,总背向散射光强要比单圈背向散射光强大,背向散射光的峰值半宽为正向光的0.64倍.这些发现对背向散射精密测量、扫频法测腔损具有一定的参考作用.
研究瞭連續激光註入時無源環形腔的揹嚮散射特性.首先,分析瞭註入光與無源腔頻率完全匹配時,正嚮光和揹散光振幅的穩態解,以及充光和快速關斷過程中正嚮光和揹散光振幅隨時間的縯化.其次,推導瞭無源腔中正嚮光和揹嚮散射光的峰值半寬.最後,討論瞭正嚮光和揹散光隨註入光頻率掃描速度的變化.髮現在環形腔中,總揹嚮散射光彊要比單圈揹嚮散射光彊大,揹嚮散射光的峰值半寬為正嚮光的0.64倍.這些髮現對揹嚮散射精密測量、掃頻法測腔損具有一定的參攷作用.
연구료련속격광주입시무원배형강적배향산사특성.수선,분석료주입광여무원강빈솔완전필배시,정향광화배산광진폭적은태해,이급충광화쾌속관단과정중정향광화배산광진폭수시간적연화.기차,추도료무원강중정향광화배향산사광적봉치반관.최후,토론료정향광화배산광수주입광빈솔소묘속도적변화.발현재배형강중,총배향산사광강요비단권배향산사광강대,배향산사광적봉치반관위정향광적0.64배.저사발현대배향산사정밀측량、소빈법측강손구유일정적삼고작용.
In order to reduce the influence of backscattering on the ring laser gyro, backscattering properties in the passive ring cavity was investigated. First, stable solutions of forward and backscattering light intensity and their temporal evolutions for quick turn-on and turn-off of incident light were obtained. Second, full width at half maximum of forward and backscattering light in the ring cavity as a function of incident laser frequency was derived. In the end, variation of forward and backscattering light as a function of incident laser frequency with different frequency scanning speed was discussed. It is found that the whole backscattering intensity is much larger than the single round backscattering intensity and full width at half maximum of backscattering light intensity is 0.64 times of forward light intensity. These findings are of some help to the measurement of backscattering as well as measurement of cavity loss using laser frequency scanning.