Broadband Flat Amplification Based on Fully Double-Pass Configuration in Serial Hybrid Fiber Amplifier

Abstract

A broadband amplification that utilizes a serial hybrid fiber amplifier is experimentally demonstrated in this paper. Two fully double-pass configurations, namely, setups A and B, are implemented. The difference between these two configurations is that the position of the two amplifiers (erbium and Raman) is swapped. These two configurations are tested under the same input parameter conditions. Two laser pump power wavelengths with a total pump power of 375 mW (1495 nm with 350 mW for Raman and 1480 nm with 25 mW for the erbium amplifier) were used. Under the optimum condition and under a small signal power of -30 dBm, a wide flatness gain bandwidth of 80 nm (1530–1610 nm) with an average gain level of 28.5 and 24 dB is achieved for setups A and B, respectively. A wide bandwidth is achieved by avoiding the amplification overlap between these two amplifiers through choosing the proper pump wavelength.

أثر انموذج إنتوستل في تنمية مهارة التفكير المعرفي لدى طالبات الصف الرابع الأدبي في مادة اللغة العربية

“…There were 32 female students to represent the experimental group. They are exposed to the independent variable (Intustel model), and Hawija Preparatory School for Girls and its members (32) female students were chosen to represent the group whose students study Arabic in the traditional way. Before the scale of cognitive thinking, the researcher studied seven units in the experiment of the Arabic language for the fourth literary year.…”