Half-Watt Tm3+-Doped Fluoride Fiber Laser at 785 nm
| Autor: | Kort Wiersma, Jie Zong, Masoud Mollaee, Xiushan Zhu, Arturo Chavez-Pirson, Nasser Peyghambarian, Robert A. Norwood |
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| Rok vydání: | 2018 |
| Předmět: |
Optical fiber
Materials science Silica fiber business.industry Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Numerical aperture Transverse mode 010309 optics Core (optical fiber) law Fiber laser 0103 physical sciences Optoelectronics Fiber Electrical and Electronic Engineering 0210 nano-technology business |
| Zdroj: | IEEE Photonics Technology Letters. 30:1563-1566 |
| ISSN: | 1941-0174 1041-1135 |
| Popis: | All-fiber single-transverse-mode laser oscillators operating at 785 nm were demonstrated by splicing a 0.1 mol% Tm 3+ -doped fluoride fiber with a core diameter of 4 μm and a numerical aperture of 0.07 to a pair of silica fiber Bragg gratings. About 500 mW of continuous-wave single transverse mode laser output at 784.5 nm with a 3-dB spectral bandwidth of 0.2 nm was obtained by upconversion pumping a 3-m-long gain fiber at 1125 nm. Our experiments show that the ground-state absorption of Tm 3+ at 785 nm is the origin of low efficiency in previous reports. The efficiency of this all-fiber laser can be improved by using a gain fiber with an optimized overlap between the laser, the pump, and the fiber core, and employing new pumping schemes that deplete the ground state sufficiently. |
| Databáze: | OpenAIRE |
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