Fe3O4 nanoparticles as a saturable absorber for giant chirped pulse generation
| Autor: | Jishu Liu, Tong Chai, Hua Xu, Yi-Xuan Guo, Jie Jiang, Abdul Qyyum, Xiaohui Li |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Physics::Optics General Physics and Astronomy 02 engineering and technology lcsh:Chemical technology lcsh:Technology 01 natural sciences law.invention 010309 optics law Fiber laser 0103 physical sciences lcsh:TP1-1185 General Materials Science erbium laser Electrical and Electronic Engineering lcsh:Science lcsh:T business.industry Pulse duration Saturable absorption Nanosecond 021001 nanoscience & nanotechnology Laser lcsh:QC1-999 fiber lasers Optical modulator saturable absorber Optoelectronics lcsh:Q Photonics 0210 nano-technology business Fe3O4 nanoparticles Ultrashort pulse lcsh:Physics |
| Zdroj: | Beilstein Journal of Nanotechnology, Vol 10, Iss 1, Pp 1065-1072 (2019) |
| ISSN: | 2190-4286 |
| DOI: | 10.3762/bjnano.10.107 |
| Popis: | Fe3O4 nanoparticles (FONPs) are magnetic materials with a small band gap and have well-demonstrated applications in ultrafast photonics, medical science, magnetic detection, and electronics. Very recently, FONPs were proposed as an ideal candidate for pulse generation in fiber-based oscillators. However, the pulses obtained to date are on the order of microseconds, which is too long for real application in communication. Here, we report the use of FONPs synthesized by a sol–hydrothermal method and used as a saturable absorber (SA) to achieve nanosecond pulses in an erbium-doped fiber laser (EDFL) for the first time. The proposed fiber laser is demonstrated to have a narrow spectral width of around 0.8 nm and a fixed fundamental repetition rate (RPR) of 4.63 MHz, whose spectra and pulse dynamics are different from the mode-locked lasers reported previously. It is demonstrated that the proposed fiber laser based on a FONP SA operates in the giant-chirp mode-locked regime. The most important result is the demonstration of a pulse duration of 55 ns at an output power of 16.2 mW, which is the shortest pulse based on FONPs for EDFLs reported to date. Our results demonstrate that the FONP dispersion allows for an excellent photonic material for application in ultrafast photonics devices, photoconductive detectors, and optical modulators. |
| Databáze: | OpenAIRE |
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