Single-Frequency Nd<sup>3+</sup>-Doped Phosphate Fiber Laser at 915 nm
Shijie Fu, Xiushan Zhu, Jie Zong, Michael Li, Ivan Zavala, Valery Temyanko, Arturo Chavez-Pirson, Robert A. Norwood, N. Peyghambarian
Abstract
Single-frequency distributed Bragg reflector fiber laser at 915 nm was demonstrated by using a 2.5-cm long Nd <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> -doped phosphate fiber as the gain medium. An output power of 13.5 mW was obtained at an absorbed pump power of 240 mW. Our experimental results show that Nd <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> -doped phosphate glass fiber is more efficient than Nd <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> -doped silica glass fiber for single-frequency laser operation in the 900 nm wavelength range.