Optimizing recording of dynamic Bragg gratings based on spatial hole burning in Er-doped fiber

Stepanov, S.; Plata, M. Manrique; Hernández-Hernández, Eliseo

doi:10.1364/fio.2003.wii5

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2020

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“…As a result, an effective light power inside the fiber is always lower than the incident one. One can say [20] that for high incident light power the first α 0 L units of the normalized incident power P/P sat are spent for saturation of the fiber absorption. The rest of the power propagates through the fiber without attenuation.…”

Section: Discussionmentioning

confidence: 99%

Two-wave mixing in erbium-doped-fibers with spectral-hole burning at 77K

Lopez¹,

Kerbertt²,

Plata³

et al. 2020

J. Opt.

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Experimental results on effective two-wave mixing (TWM) via dynamic population gratings in saturable erbium doped fibers (EDFs) at liquid nitrogen temperature (77 K) are reported. It is shown that formation of the spectral holes (SHs) by the recording coherent waves in the wavelength region 1500-1540 nm results in a complex dynamics of the transient TWM response. In addition to conventional slow, even-type response due to amplitude grating formation via spectrally uniform EDF absorption saturation we also observed a dominating contribution due to SH formation. In particular, at the recording wavelength 1527 nm the relaxation time of the SH contribution to the TWM process was significantly shorter (< 4.7 ms) and with the effective recording power ∼4 times lower than that for conventional EDF population grating.

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Section: Discussionmentioning

confidence: 99%