Generation of stable nanosecond dual-pulse in an erbium-doped fiber laser with normal dispersion
| Autor: | Kexuan Li, Heyang Guoyu, Runqin Xu, Yanrong Song, Jinrong Tian |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Femtosecond pulse shaping
Materials science business.industry Physics::Optics 02 engineering and technology Nanosecond Laser 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Pulse (physics) 010309 optics 020210 optoelectronics & photonics Polarization controller Optics Multiphoton intrapulse interference phase scan law Fiber laser 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering business Bandwidth-limited pulse |
| Zdroj: | Optics & Laser Technology. 96:18-22 |
| ISSN: | 0030-3992 |
| Popis: | 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 256 m OFS-980 fiber. With the pump power of 1120 mW, the laser generates a highly stable dual-pulse train with the pulse widths of 6.2 ns and 1.2 ns respectively. By simply changing the pump power, the pulse width of one of dual-pulse can be tuned from 2.1 to 6.2 ns while the other pulse keeping almost the same duration of 1.2 ns. The maximum dual-pulse energy is about 72.5 nJ with a repetition rate of 783.3 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. |
| Databáze: | OpenAIRE |
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