Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5007183 | Optics & Laser Technology | 2017 | 5 Pages |
Abstract
Because of the special needs for nanosecond double pulse applications in micromachining and material processing, we demonstrated a stable nanosecond dual-pulse erbium-doped fiber laser based on nonlinear polarization rotation technology. The fiber laser operates in a normal dispersion regime with a length of 256Â m OFS-980 fiber. With the pump power of 1120Â mW, the laser generates a highly stable dual-pulse train with the pulse widths of 6.2Â ns and 1.2Â ns respectively. By simply changing the pump power, the pulse width of one of dual-pulse can be tuned from 2.1 to 6.2Â ns while the other pulse keeping almost the same duration of 1.2Â ns. The maximum dual-pulse energy is about 72.5Â nJ with a repetition rate of 783.3Â kHz. The formation of such nanosecond dual-pulse is attributed to the pulse splitting and depends on the parameters of the laser cavity, such as the cavity-length and the state of polarization controller. The experiment of a single square pulse splitting into different shapes of nanosecond dual-pulse was demonstrated.
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Electrical and Electronic Engineering
Authors
Kexuan Li, Yanrong Song, Jinrong Tian, Heyang Guoyu, Runqin Xu,