EXPERIMENTAL RESEARCH OF Nd3+-DOPED POLARIZATION MAINTAINING FIBER AMPLIFIER.

We demonstrate a double-clad Nd3+-doped polarization maintaining fiber (PMF) amplifier at 1064 nm for a compact configuration of a high-gain and low-noise optical fiber amplifier. The proposed 125 μm inner-cladding diameter in the double-clad fiber provides the single-mode propagation of the signal lightwave into its doped core without misguiding the signal lightwave into the outer-cladding. The small signal gain of Nd3+-doped fiber amplifier is 24 dB, and its noise coefficient is less than 8 dB. [ABSTRACT FROM AUTHOR]