Mode Selection in Large-Mode-Area Step-Index Multicore Fiber Laser and Amplifier
| Autor: | Yanyan Zhou, Raghuraman Sidharthan, Amiel A. Ishaaya, Udi Ben Ami, W. J. Lai, Junhua Ji, Xiaosheng Huang, Yehuda Benudiz, Nan Xia, Seongwoo Yoo, Jichao Zang |
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| Přispěvatelé: | School of Electrical and Electronic Engineering, Temasek Laboratories @ NTU, Centre for Optical Fibre Technology |
| Rok vydání: | 2020 |
| Předmět: |
Ytterbium
Materials science business.industry Amplifier Slope efficiency Laser chemistry.chemical_element Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Numerical aperture law.invention Core (optical fiber) chemistry law Electrical and electronic engineering [Engineering] Optoelectronics Fiber Electrical and Electronic Engineering business Lasing threshold Gaussian beam |
| Zdroj: | IEEE Photonics Technology Letters. 32:722-725 |
| ISSN: | 1941-0174 1041-1135 |
| DOI: | 10.1109/lpt.2020.2992031 |
| Popis: | We present mode-selection in a laser and an amplifier from a multicore Ytterbium (Yb) doped step-index fiber with six large mode area and low numerical aperture (NA) cores, fabricated using a combination of chelate delivery system (CDS) and stack and draw technique. The six cores are placed in a ring shape with each core having a diameter of $\sim 19~\mu \text{m}$ and NA of ~0.068, or V-number of ~3.8 at $1.06~\mu \text{m}$ . The cores are placed with a 1.1 pitch-to-core ratio, which efficiently promotes supermode generation and creates a good modal separation to facilitate mode selection. Mode selection of the multicore fiber is investigated in a laser as well as an amplifier configuration. With an intracavity pinhole, we are able to select the fundamental in-phase supermode for lasing up to 33.9W output power with a 52% slope efficiency. In the amplifier configuration, a Gaussian beam from a seed source is successfully coupled to the fundamental supermode in the multicore fiber. The seed source is amplified to ~43.5W from 0.14 W input power. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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