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    • 2. 发明授权
    • Optical fibre hydrophone
    • 光纤水听器
    • US4536861A
    • 1985-08-20
    • US583644
    • 1984-02-27
    • Philippe GraindorgeHerve Arditty
    • Philippe GraindorgeHerve Arditty
    • H04R23/00G01H9/00G01S7/521G02B6/00H04R1/44H04R17/00
    • G01H9/004
    • The invention relates to a monomodal optical fibre hydrophone operating by elastooptical effect, which has an interferometer structure comprising a measuring arm, in which is arranged a very long monomodal optical fibre immersed in the interaction medium in which propagates the soundwave. A phase displacement is induced by an elastooptical effect on the soundwave propagating in the fibre, by a soundwave producing an acoustic pressure field in said medium. A reference arm establishes a reference optical path and the phase displacement, linked with the sound wave, is detected by interferometry between the two optical waves coming from these two arms. This two-armed interferometer is terminated by a photorefractive medium used as an interactive reflector in accordance with the four-wave interferometry principle.
    • 本发明涉及一种通过弹性光学效应操作的单模光纤水听器,其具有包括测量臂的干涉仪结构,其中布置有浸入传播声波的相互作用介质中的非常长的单模光纤。 通过在所述介质中产生声压场的声波,通过弹性光学效应对在光纤中传播的声波产生相位移动。 参考臂建立参考光路,并且通过来自这两个臂的两个光波之间的干涉测量来检测与声波相关的相位位移。 这种双臂干涉仪由根据四波干涉测量原理的用作交互式反射器的光折射介质终止。