Generation of Giant-Chirp Laser Pulses in a Stretched-Pulse Mode-Locked Fiber Laser

Mingwei, 石明威 Shi; Bowen, 刘博文 Liu; Sijia, 王思佳 Wang; Lu, 柴路 Chai; Minglie, 胡明列 Hu; Chingyue, 王清月 Wang

doi:10.3788/cjl201239.0202007

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the same time, the time bandwidth product of the pulses in the fiber laser is calculated, which exceeds 1000. Thus it can be stated that the laser presented here operates in the mode-locked regime and generates giant-chirp pulses [47–49]. The giant-chirp passively mode-locked fiber laser can be used in many applications, such as chirp pulse amplification, as a seed laser for a high-power fiber laser, which can be potentially applied in certain materials processing, optical coherent detection applications, etc.…”

Section: Resultsmentioning

confidence: 99%

Fe₃O₄ nanoparticles as a saturable absorber for giant chirped pulse generation

Liu¹,

Li²,

Qyyum³

et al. 2019

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%