Journal
OPTICS LETTERS
Volume 30, Issue 15, Pages 1923-1925Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.30.001923
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We demonstrate a fiber Fabry-Perot (FFP) sensor that is capable of detecting subpicostrain signals, from 100 Hz and extending beyond 100 kHz, using the Pound-Drever-Hall (PDH) frequency locking technique. A low-power diode laser at 1550 nm is locked to a free-space reference cavity to suppress its free-running frequency noise, thereby stabilizing the laser. The stabilized laser is then used to interrogate a FFP sensor whose PDH error signal yields the instantaneous fiber strain. (c) 2005 Optical Society of America.
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