Demonstration of a passive sub-picostrain fiber strain sensor

Details Demonstration of a passive sub-picostrain fiber strain sensor Demonstration of a passive sub-picostrain fiber strain sensor

2005-04-11

arxiv.org/abs/physics/0504069v1

Physics

Optics

3 pages, 4 figure, to appear in Optics Letters

Scientific paper

10.1364/OL.30.001923

We demonstrate a fiber Fabry-Perot (FFP) sensor capable of detecting sub-picostrain signals, from 100 Hz and extending beyond 100 kHz, using the Pound-Drever-Hall 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 where the PDH error signal yields the instantaneous fiber strain.

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