A micrometric deflection fiber laser sensor controlled by polarized light pumping

This work presents a study of a deflection laser sensor using a pump light source with different polarization states and shows that controlling the polarization state of the pump source can achieve better control in the tuning of an erbium-doped fiber laser. Laser tuning uses a selective wavelength filter manufactured using a thin core fiber section between two single-mode fibers, while the deflection is applied using an angular mechanism. In addition, the sensor was analyzed according to the wavelength shift of the laser emission as a function of the angular micrometric deflection, and a sensitivity of -33.01 pm & mu;rad(-1) was obtained in a dynamic range from 0 to 89.3 & mu;rad with an adjustment parameter R (2) = 0.993 61. We achieved dual-wavelength tuning with gradual shifting and single-wavelength tuning from 1531.5 nm to 1547.7 nm. This sensor exhibits potential applications in the bionic and robotic detection fields owing to its high sensitivity, good linearity, simple fabrication, and low cost.

Automated summary

This study investigates a deflection laser sensor using pump light source polarization control for tuning an erbium-doped fiber laser. By controlling the polarization state of the pump source, the tuning of the laser can be better controlled. The sensor demonstrates potential applications in bionic and robotic detection fields due to its high sensitivity, good linearity, simple fabrication, and low cost.