Demonstration of a passive sub-picostrain fiber strain sensor

Abstract

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.

3 pages, 4 figure, to appear in Optics Letters

References in corpus (3)

• Detector Description and Performance for the First Coincidence Observations between LIGO and GEO
• Phase-sensitive interrogation of fiber Bragg grating resonators for sensing applications
• Pump-probe differencing technique for cavity-enhanced, noise-canceling saturation laser spectroscopy

Cited by in corpus (4)

• Observation of Fundamental Thermal Noise in Optical Fibers down to Infrasonic Frequencies
• Robust laser frequency stabilization by serrodyne modulation
• Ultrahigh-Resolution Fiber-Optic Sensing Using a High-Finesse, Meter-Long Fiber Fabry-Perot Resonator
• Ultrasensitive, high-dynamic-range and broadband strain sensing by time-of-flight detection with femtosecond-laser frequency combs