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High power narrow-linewidth linearly polarized nanosecond all-fiber amplifier with near-diffraction-limited beam quality
| Content Provider | Scilit |
|---|---|
| Author | Ran, Yang Su, Rongtao Ma, Pengfei Wang, Xiaolin Zhou, Pu Si, Lei |
| Copyright Year | 2015 |
| Description | Journal: Journal of Optics We present a monolithic high power narrow-linewidth linearly polarized nanosecond all-fiber laser in a master oscillator power amplifier configuration. The pulsed seed is generated by modulating a single-frequency continuous wave laser at 1064 nm using an electro-optic intensity modulator. In order to suppress stimulated Brillouin scattering (SBS), the pulse width is set to be ~4 ns. When the repetition rate is set to be 20 MHz or 10 MHz, SBS has been observed in the main amplifier. The corresponding SBS thresholds are ~100 W and 120 W respectively. At the repetition rate of 5 MHz, the pulse width is compressed to ~3 ns and an average power of 136 W is obtained, corresponding to peak power of 8.5 kW. Further power scaling is limited by stimulated Raman scattering. At maximum output power, the beam quality $(M^{2}$ factor) is ~1.1 and the polarization extinction ratio is >15.8 dB. |
| Related Links | http://iopscience.iop.org/article/10.1088/2040-8978/18/1/015506/pdf |
| ISSN | 20408978 |
| e-ISSN | 20408986 |
| DOI | 10.1088/2040-8978/18/1/015506 |
| Journal | Journal of Optics |
| Issue Number | 1 |
| Volume Number | 18 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2016-01-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Optics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials |
