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公开(公告)号：EP0104943A3
公开(公告)日：1986-02-12
申请号：EP83305790
申请日：1983-09-27
CPC分类号： G01H9/004 , G02B26/06 , G02F1/0134
摘要： A fiber optic sensor comprises a length of optical fiber (10), forming a loop (40), and a fiber optic directional coupler (20) for optically closing the loop (14). The loop (14) and coupler (20) form a resonant cavity for light circulating therethrough. A PZT cylinder (118), about which the fiber loop (14) is wrapped, is utilized to control the total round trip phase delay of the circulating light, and thus, control the intensity of the optical output signal W o . The phase delay is adjusted to a point Z where the optical output signal W e is at maximum sensitivity to changes in phase. When the fiber loop (14) is exposed to, e.g., acoustic waves, the loop length changes correspondingly, thereby causing the phase delay, and thus, the optical output signal W o to vary. By detecting variations in output signal intensity, the frequency and intensity of the acoustic waves may be determined. The sensor also includes a feedback system for stabilizing the fiber loop (14) against low frequency thermal drift.
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公开(公告)号：EP0104942A2
公开(公告)日：1984-04-04
申请号：EP83305787.0
申请日：1983-09-27
摘要： A Brillouin ring laser comprises a fiber optic resonator formed from a loop (14) of fiber optic material (10) and a fiber optic directional coupler (20) for optically closing the loop (14).
摘要翻译： 布里渊环形激光器包括由光纤材料（10）的环（14）和用于光学地闭合环（14）的光纤定向耦合器（20）形成的光纤谐振器。
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公开(公告)号：EP0104942B1
公开(公告)日：1990-02-28
申请号：EP83305787.0
申请日：1983-09-27
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公开(公告)号：EP0104943B1
公开(公告)日：1989-08-30
申请号：EP83305790.4
申请日：1983-09-27
CPC分类号： G01H9/004 , G02B26/06 , G02F1/0134
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公开(公告)号：EP0104943A2
公开(公告)日：1984-04-04
申请号：EP83305790.4
申请日：1983-09-27
CPC分类号： G01H9/004 , G02B26/06 , G02F1/0134
摘要： A fiber optic sensor comprises a length of optical fiber (10), forming a loop (40), and a fiber optic directional coupler (20) for optically closing the loop (14). The loop (14) and coupler (20) form a resonant cavity for light circulating therethrough. A PZT cylinder (118), about which the fiber loop (14) is wrapped, is utilized to control the total round trip phase delay of the circulating light, and thus, control the intensity of the optical output signal W o . The phase delay is adjusted to a point Z where the optical output signal W e is at maximum sensitivity to changes in phase. When the fiber loop (14) is exposed to, e.g., acoustic waves, the loop length changes correspondingly, thereby causing the phase delay, and thus, the optical output signal W o to vary. By detecting variations in output signal intensity, the frequency and intensity of the acoustic waves may be determined. The sensor also includes a feedback system for stabilizing the fiber loop (14) against low frequency thermal drift.
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