This patented technology is a magnetically actuated photonic crystal sensor system. It utilizes a photonic crystal (PC) coupled to magnetic material which is then mounted on an optical fiber.
An optical hydrophone that is insensitive to hydrostatic pressure, yet capable of measuring acoustic pressures as low as the background noise in the ocean in a broad frequency range of 1 Hz to 100 kHz is reported.
In certain embodiments, an optical device and a method of use is provided. The optical device can include a fiber Bragg grating and a narrowband optical source. The narrowband optical source can be configured to generate light.