Abstract
We propose and demonstrate a multiplexing method for ultrasonic sensors based on fiber Bragg gratings (FBGs) that are included inside the laser cavity of a fiber-ring laser. The multiplexing is achieved using add-drop filters to route the light signals, according to their wavelengths, into different optical paths, each of which contains a separate span of erbium-doped fiber (EDF) as the gain medium. Because a specific span of EDF only addresses a single wavelength channel, mode completion is avoided and the FBG ultrasonic sensors can be simultaneously demodulated. The proposed method is experimentally demonstrated using a two-channel system with two sensing FBGs in a single span of fiber.
Original language | English (US) |
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Pages (from-to) | 30474-30480 |
Number of pages | 7 |
Journal | Optics Express |
Volume | 21 |
Issue number | 25 |
DOIs | |
State | Published - Dec 16 2013 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics