Laser Phase Interferometry is a measurement technique that uses the interference of laser beams to detect extremely small changes in distance, refractive index, or vibration. At NEC Labs America, laser phase interferometry is applied in distributed fiber sensing and high-sensitivity monitoring. The approach allows researchers to measure environmental changes at fine resolution, advancing applications in structural health monitoring, seismic detection, and precision metrology.
We investigate the growth rate of phase power spectral density in fiber spools in the presence of ambient acoustic noise, observing a complex interplay between spool geometry, shielding effects, and phase cancellation at high acoustic frequencies.
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NEC Laboratories America, Inc. (NEC Labs) is the US-based center for NEC Corporation’s global network of corporate research laboratories. Our diverse research groups collaborate with industry, academia and governments to provide disruptive solutions to complex problems. A leader in the integration of IT and network technologies with more than 100 years of expertise, NEC provides a combination of products and solutions that cross-utilize the company’s experience and global resources to meet the complex and ever-changing needs of its customers.