Abstract
We have developed and demonstrated a polarisation-maintaining single-mode ytterbium-doped fibre for light amplification at a wavelength near 0.976 μm in an all-fibre configuration. A distinctive feature of the proposed fibre design is low losses due to fusion splices with standard single-mode fibre having a core diameter of 10 μm, which has made it possible to produce an all-fibre small-signal amplifier with a gain threshold near 3 W and a differential pump-to-signal conversion efficiency of 9.8 % in the saturation regime. The proposed amplifier has been shown to be well-suited for small-signal amplification. In particular, at an input signal power near 1 mW and a gain of 20 dB, the ratio of the amplified signal to the integrated luminescence intensity near 0.976 μm exceeds 20 dB. A 40-dB gain has been demonstrated for an ultrasmall signal of ∼10-μW power.
Original language | English (US) |
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Pages (from-to) | 919-924 |
Number of pages | 6 |
Journal | Quantum Electronics |
Volume | 49 |
Issue number | 10 |
DOIs | |
State | Published - 2019 |
Keywords
- Large mode area fibre
- Ytterbium fibre amplifier
- Ytterbium-doped optical fibre
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Statistical and Nonlinear Physics
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering