Theoretical Modelling of Cascaded Er3+-Doped, Tm3+-Doped and Nd3+-Doped Fibers for 0.4 to 2.0 μm Emission Spectra

doi:10.1007/s12204-019-2122-2

Abstract

Abstract: We present a cascaded system designed with Er3+-doped, Tm3+-doped and Nd3+-doped fibers to realize amplified spontaneous emission (ASE) spectra covering 0.4—2.0 μm. The system is excited with a pump laser emitting 808 nm photons with 500mW pump power. The emission spectra of the cascaded system covering 0.4—2.0 μm are realized with the Er3+, Tm3+ and Nd3+ ion doping densities optimized to 8 × 1019, 2 × 1020 and 8 × 1020 ion/m3, respectively, and the fiber length optimized to 1 m. Numerical methods reveal that the peak ASE power for the cascaded system can reach 20.9mW. A minimum ASE power of 4.39mW is attainable. Using numerical calculations and analytical techniques, we provide a detailed insight into optimized Er3+-doped, Tm3+- doped and Nd3+-doped fiber lengths and their doping concentrations for ASE power spectra covering 0.4—2.0 μm. We believe that the cascaded system can potentially provide significant applications in various optical fields which include but not limited to wavelength-division multiplexing, various optical communications and other salient medical imaging processes.

Key words: cascaded fiber| amplified spontaneous emission (ASE)| rare-earth doped fiber

摘要： We present a cascaded system designed with Er3+-doped, Tm3+-doped and Nd3+-doped fibers to realize amplified spontaneous emission (ASE) spectra covering 0.4—2.0 μm. The system is excited with a pump laser emitting 808 nm photons with 500mW pump power. The emission spectra of the cascaded system covering 0.4—2.0 μm are realized with the Er3+, Tm3+ and Nd3+ ion doping densities optimized to 8 × 1019, 2 × 1020 and 8 × 1020 ion/m3, respectively, and the fiber length optimized to 1 m. Numerical methods reveal that the peak ASE power for the cascaded system can reach 20.9mW. A minimum ASE power of 4.39mW is attainable. Using numerical calculations and analytical techniques, we provide a detailed insight into optimized Er3+-doped, Tm3+- doped and Nd3+-doped fiber lengths and their doping concentrations for ASE power spectra covering 0.4—2.0 μm. We believe that the cascaded system can potentially provide significant applications in various optical fields which include but not limited to wavelength-division multiplexing, various optical communications and other salient medical imaging processes.

关键词: cascaded fiber| amplified spontaneous emission (ASE)| rare-earth doped fiber

CLC Number:

TN 929.11

NKONDE Sampa, JIANG Chun (姜淳). Theoretical Modelling of Cascaded Er3+-Doped, Tm3+-Doped and Nd3+-Doped Fibers for 0.4 to 2.0 μm Emission Spectra[J]. Journal of Shanghai Jiao Tong University (Science), 2019, 24(6): 754-762.

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[19]	JACKSON S D, KING T A. Theoretical modeling ofTm-doped silica fiber lasers [J]. Journal of LightweightTechnology, 1999, 17(5): 948-956.
[20]	ZEMON S, PEDERSON G, LAMBERT G, et al. Excitedstate absorption cross section and amplifier modellingin the 1300nm region of Nd-doped glasses [J].IEEE Photonics Technology Letters, 1992, 4(3): 244-247.
[21]	ZEMON S, PEDERSEN G, LAMBERT G, et al.Excited-state-absorption cross sections and amplifiermodeling in the 1 300-nm region for Nd-doped glasses[J]. IEEE Photonics Technology Letters, 1992, 4(3):244-247.
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[23]	MCCUMBER D E. Einstein relations connectingbroadband emission and absorption spectra[J].Physical Revision A, 1964, 136(4): 954-957.
[24]	GILES C R, DESURVIRE E. Propagation of signaland noise in concatenated erbium-doped fiber opticalamplifiers [J]. Journal of Lightwave Technology, 1991,9(2): 147-154.
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