Transversal Loading Sensor Based on Tunable Beat Frequency of a Dual-Wavelength Fiber Laser

• Microwave signal generation by using the photonic beating from a phase-shift fiber Bragg grating (PS-FBG)-based dual-wavelength laser is proposed and experimentally demonstrated. The dual-wavelength laser is formed by a linear cavity, in which a PS-FBG is used as a dual-wavelength selective component. Transversal loading on the PS-FBG enhances the birefringence of the optical fiber and consequently makes the transmission peak of the PS-FBG splitting into two sharp transmission peaks of orthogonal polarizations. The wavelength spacing between the two transmission peaks increases with the transversal loading on the PS-FBG, thus making the polarization beating frequency increase. This property is exploited in a transversal loading sensor.

Nyckelord

Beating

microwave generation

phase-shift fiber Bragg grating

(PS-FBG)

transversal loading

generation

pressure

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)