1 October 2008 Gain and noise figure characteristics of an Er3+–Yb3+ doped phosphate glass waveguide amplifier with a bidirectional pump scheme and double-pass configuration
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Abstract
The net gain (Gnet) and internal noise figure (INF) characteristics of an Er3+–Yb3+ doped waveguide amplifier (EYDWA) with a bidirectional pump scheme and double-pass configuration (DPC) were analyzed both experimentally and numerically. A propagation-rate-equation model was used to describe the eight-level EYDWA system. The EYDWAs used in the experiments were fabricated on an Er3+–Yb3+ doped phosphate glass waveguide of 3.8-cm length using a two-step ion exchange. In comparison with the backward-pump-only scheme (BPOS), the equalizing bidirectional pump scheme (EBPS) achieved a 4.1-dB enhancement in Gnet, while the forward-pump-only scheme (FPOS) achieved a 6.0-dB reduction in the INF with a single-pass configuration (SPC) and 90-mW total pump power. About a 100% enhancement in the Gnet and 50% less deterioration in the INF were obtained in DPC compared with SPC under saturation pump power. A 4.1-dB enhancement in Gnet and a 1.4-dB reduction in INF were observed by applying EBPS instead of BPOS or FPOS with 150-mW total pump power in DPC. Both the experiments and simulations showed that a significant improvement in the performance of the EYDWA can be achieved by optimizing the amplification configuration and pump scheme.
Gongwang Shao, Guoliang Jin, Qu Li, "Gain and noise figure characteristics of an Er3+–Yb3+ doped phosphate glass waveguide amplifier with a bidirectional pump scheme and double-pass configuration," Optical Engineering 47(10), 104201 (1 October 2008). https://doi.org/10.1117/1.3000591
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