Single-frequency all-fiber amplifier with a record output power of 703 W

Shi, Chaodu; Deng, Xun; Fu, Shijie; Sheng, Quan; Jiang, Peiheng; Shi, Zheng; Li, Yanyan; Shi, Wei; Yao, Jianquan

doi:10.1364/assl.2022.atu5a.6

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…The digital elevation model (DEM) is a digital representation of surface elevation, and it has become a vital input variable in a variety of research fields such as geomorphology [1], hydrology [2], terrain mapping [3], disaster monitoring and control [4,5], etc. To date, there are a series of global-scale, highaccuracy, and open-access DEM datasets derived from remote-sensing-based techniques.…”

Section: Introductionmentioning

confidence: 99%

Enhancing SRTM DEM Correction Accuracy with a PSO-RF Method Utilizing ICESat-2/ATLAS Data

2023

AJETS

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This study proposes a new method for correcting the Shuttle Radar Topography Mission (SRTM) digital elevation model (DEM), as current methods, such as the polynomial regression (PR) method, are limited in their ability to fully capture complex nonlinear relationships between elevation errors and their influencing factors. The proposed method combines the benefits of particle swarm optimization (PSO) and random forest (RF) algorithms. First, elevation control photons (ECPs) are extracted from strong beams of the Advanced Topographic Laser Altimeter System (ATLAS) on the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2), and the elevation errors of the SRTM DEM, terrain factors, and landcover classes for each ECP are then calculated. Next, a SRTM DEM correction model based on the RF is designed, and PSO is utilized to determine hyper-parameters of the RF. Finally, the corrected SRTM DEM for the San Joaquin Valley and the Sierra Nevada is produced as an example. The proposed PSO-RF correction method is validated using high-precision airborne light detection and ranging (LiDAR) data, and the results show that it significantly improves the quality of the SRTM DEM. Specifically, the mean absolute error (MAE) and root mean square error (RMSE) are 9.24% and 13.3% lower than those of the existing PR method in the study area, respectively.

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Section: Introductionmentioning

confidence: 99%

Enhancing SRTM DEM Correction Accuracy with a PSO-RF Method Utilizing ICESat-2/ATLAS Data

2023

AJETS

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“…In 2018, Shi et al reported the generation of dualwavelength NLP from a passively mode-locked all-fiber laser based on multimode interference effect. In their experiment, a homemade multimode interference filter was utilized in an Erdoped fiber ring laser with NPE configuration [38]. In 2019, Lv et al reported the generation of NLPs in Yb-doped fiber laser adopting hybrid structure of multimode fiber as effective mode-locked modulator [39].…”

Section: Introductionmentioning

confidence: 99%

Generation of a noise-like pulse from an erbium-doped fiber laser based on nonlinear multimode interference

Zhao

Wang

2020

Laser Phys.

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A noise-like pulse (NLP) is generated in an anomalous-dispersion passively mode-locked erbium-doped fiber laser using graded-index multimode fiber (GIMF) as the all-fiber saturable absorber (SA) for the first time. By splicing two sections of bending GIMF at both ends of a single mode fiber and optimizing the birefringence and nonlinear parameters, stable NLP mode-locking operation can be achieved within a wide pump power range. Meanwhile, the performances of NLP mode-locking have been analyzed experimentally by changing the length of the GIMF.

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Single-frequency all-fiber amplifier with a record output power of 703 W

Abstract: A single-frequency fiber amplifier at 1064 nm with output power of 703 W was demonstrated in an all-fiber configuration, in which a spectral linewidth of 2 kHz was achieved at the 703-W laser power.

Cited by 2 publications

References 2 publications

Enhancing SRTM DEM Correction Accuracy with a PSO-RF Method Utilizing ICESat-2/ATLAS Data

Enhancing SRTM DEM Correction Accuracy with a PSO-RF Method Utilizing ICESat-2/ATLAS Data

Generation of a noise-like pulse from an erbium-doped fiber laser based on nonlinear multimode interference

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