论文信息 - High-resolution, high-frequency wavelength shift detection of optical signals with low-cost, compact readouts

High-resolution, high-frequency wavelength shift detection of optical signals with low-cost, compact readouts

Fiber-optics (FO) have great potential for distributed sensing in various harsh environment applications. Their advantages include high resolution and multiplexing capabilities, inherent immunity to electromagnetic interference, and low weight/volume. However, their widespread adoption in commercial applications has been considerably limited by the high cost, size, weight, and lack of capabilities of the readout unit used to interpret the FO signals. PARC has developed a breakthrough wavelength shift detection (WSD) technology that is capable of reading out signals from wavelength-encoded FO and other optical sensors with high sensitivity using a compact, high-speed and low-cost unit. In this paper, its calibration and noise performance is demonstrated for high-resolution (up to 1,45 fm/√Hz) acoustic emission (AE) detection of fast (up to 1 MHz) dynamic strain signals.

[1] Peter Kiesel,et al. Resolving pm wavelength shifts in optical sensing , 2007 .

[2] Nobuaki Takahashi,et al. Fiber Bragg Grating Vibration Sensor Using Incoherent Light. , 2001 .

[3] C. Scruby,et al. An introduction to acoustic emission , 1986 .

[4] Richard D. Finlayson,et al. Health monitoring of aerospace structures with acoustic emission and acousto-ultrasonics , 2003 .

[5] T. Ohzuku,et al. Monitoring of Particle Fracture by Acoustic Emission during Charge and Discharge of Li / MnO2 Cells , 1997 .

[6] S. Krishnaswamy,et al. Intrinsic fiber-optic ultrasonic sensor array using multiplexed two-wave mixing interferometry. , 2002, Applied optics.

[7] Ian Bennion,et al. Miniature fiber optic ultrasonic probe , 1996, Optics & Photonics.

[8] Peter Kiesel,et al. Compact and fast read-out for wavelength-encoded biosensors , 2010, MOEMS-MEMS.

[9] Sridhar Krishnaswamy,et al. Intrinsic fiber-optic ultrasonic sensor array using multiplexed two-wave mixing interferometry , 2002 .

[10] Joerg Martini,et al. Compact wavelength monitor for remote sensing applications suitable to precisely measure the wavelength of individual laser pulses , 2013, Defense, Security, and Sensing.