Gain and noise figure characteristics of an Er3+–Yb3+ doped phosphate glass waveguide amplifier with a bidirectional pump scheme and double-pass configuration

Gongwang Shao; Guoliang Jin; Qu Li

doi:10.1117/1.3000591

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

Gongwang Shao, Guoliang Jin, Qu Li

Author Affiliations +

Optical Engineering, Vol. 47, Issue 10, 104201 (October 2008). https://doi.org/10.1117/1.3000591

Abstract

The net gain (G_net) 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 G_net, 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 G_net and 50% less deterioration in the INF were obtained in DPC compared with SPC under saturation pump power. A 4.1-dB enhancement in G_net 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.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Gongwang Shao, Guoliang Jin, and 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

Published: 1 October 2008

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