Lasers : All-fibre single-mode small-signal amplifier operating near 0.976 μm. (21st October 2019)

• Record Type: Journal Article
• Authors: Aleshkina, S S; Lipatov, D S; Kochergina, T A; Velmiskin, V V; Temyanko, V L; Kotov, L V; Bardina, T L; Bubnov, M M; Guryanov, A N; Likhachev, M E
• Is Part Of: Quantum electronics. Volume 49:Number 10(2019)
• Page Start: 919
• Page End: 924
• Publication Date: 2019-10-21
• Subjects: Quantum electronics -- Periodicals; 537.5
• DOI: 10.1070/QEL17053
• Languages: English
• ISSNs: 1063-7818

Abstract

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.