Designing high performance Er+3-doped fiber amplifier in triangular-lattice photonic crystal fiber host towards higher gain, low splice loss
✍ Scribed by Kajal Mondal; Partha Roy Chaudhuri
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 573 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0030-3992
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✦ Synopsis
In order to improve the over-all performance of all-fiber amplifier using Er þ 3 -doped triangular-lattice photonic crystal fiber (PCF), we performed a detailed study on the amplifying characteristics of the PCF host by varying all associated geometrical parameters towards utilizing controllable effective numerical aperture and tight modal confinement. A finite difference (FD) mode convergence analysis is used to determine the modal propagation characteristics of the structure, which is then used to solve a standard propagation and population rate equation. Our results show that a spectral gain of the amplifier as high as 51 dB and that too over a short length $ 2.5 m of the fiber is achievable by optimizing the transverse geometry of the fiber. Aimed at field-deployment of the amplifier as inline component, we calculate the important all-fiber characteristics, namely, beam divergence, bending loss and nonlinearity and then optimize the splicing/coupling loss (resulting from the fundamental mode mismatch only) of this active fiber device. Notably, the splice loss with standard telecom-grade SMF-28 fiber is considerably minimized through an improved mode-matching of the design. These results record a marked improvement in fiber amplifier research in realizing high-performance EDFA-PCF amplifiers.