Abnormal residual pump behavior in homemade DSCCP fiber

Fengyun Li; Nian Liu; Jiangyun Dai; Chun Zhang; Cong Gao; Rumao Tao; Lingli Huang

doi:10.1117/12.3007996

18 December 2023 Abnormal residual pump behavior in homemade DSCCP fiber

Fengyun Li, Nian Liu, Jiangyun Dai, Chun Zhang, Cong Gao, Rumao Tao, Lingli Huang

Proceedings Volume 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration; 1295917 (2023) https://doi.org/10.1117/12.3007996
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

In a recent experimental study, we investigated a homemade distributed side-coupled cladding-pumped (DSCCP) fiber using a master oscillator power amplifier (MOPA) configuration and tandem-pumping technique. During the experiment, we observed an abnormal behavior of the residual pump power from the counter port of the pump core. This abnormal behavior exhibited a threshold-like characteristic, with both the residual power and corresponding power ratio to injected pump starting to increase exponentially above a specific value. Specifically, when the pump power injected into the system ranged from 7.2 kW to 11.77 kW, the corresponding residual power ratio increased from 4.05% to 11.01%. Simultaneously, the signal optical-to-optical conversion efficiency decreased from 84.11% to 75.33%. This sudden appearance of the phenomenon significantly limits the ability to further scale the power of the system. However, the underlying mechanism causing this abnormal behavior remains unclear and requires further investigation.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Fengyun Li, Nian Liu, Jiangyun Dai, Chun Zhang, Cong Gao, Rumao Tao, and Lingli Huang "Abnormal residual pump behavior in homemade DSCCP fiber", Proc. SPIE 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration, 1295917 (18 December 2023); https://doi.org/10.1117/12.3007996

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KEYWORDS

Fiber lasers

Absorption

Cladding

Beam diameter

Oscillators

Optical filters

Raman scattering

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