Mode-Locked Tm Fiber Laser With a Tapered GIMF SA Based on Nonlinear Multimode Interference Effect
| Autor: | Fangming Hu, Ren Xinghao, Huanhuan Li, Jiang Hao, Can Li, Shiqing Xu |
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| Rok vydání: | 2020 |
| Předmět: |
Multi-mode optical fiber
Materials science business.industry Physics::Optics Pulse duration Saturable absorption 02 engineering and technology Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 020210 optoelectronics & photonics law Fiber laser Spectral width 0202 electrical engineering electronic engineering information engineering Optoelectronics Electrical and Electronic Engineering Photonics business Ultrashort pulse |
| Zdroj: | IEEE Photonics Technology Letters. 32:503-506 |
| ISSN: | 1941-0174 1041-1135 |
| DOI: | 10.1109/lpt.2020.2980126 |
| Popis: | We experimentally demonstrate a passively mode-locked all-fiber Tm laser with an all-fiber saturable absorber (SA) which operates based on the nonlinear multimode interference (NL-MMI) effect in a tapered graded-index multimode fiber (GIMF). The tapered GIMF SA demonstrates the nonlinear characteristics of modulation depth of 21.15%, and saturation fluence of $89.04~\mu \text{J}$ /cm2. We obtain stable fundamentally mode-locking operation at a pump threshold of 120 mW. The output soliton pulses have a center wavelength, spectral width, pulse duration and repetition rate of 1935 nm, 2.1 nm, 1.9 ps and 18.79 MHz, respectively. This is a simple, low-cost, stable, and convenient laser oscillator with many potential applications in eye-safe ultrafast photonics. |
| Databáze: | OpenAIRE |
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