Radially- and azimuthally- polarized nanosecond Yb-doped MOPA system incoporating temporal shaping
Lin, Di, Baktash, Neda and Berendt, Martin et al. (2017) Radially- and azimuthally- polarized nanosecond Yb-doped MOPA system incoporating temporal shaping Optics Letters (doi:10.1364/OL.99.099999).
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We report an Yb-doped fiber master-oscillator power-amplifier (MOPA) system with the capability of selectively generating doughnut-shaped radially- and azimuthally-polarized beams with user-defined temporal pulse shapes. The desired output polarization was generated with the aid of a nanograting spatially variant half-waveplate (S-waveplate). The latter was used to convert the linearly-polarized fundamental (LP01) mode output from the pre-amplification stages to a doughnut-shaped radially-polarized beam prior to the power amplifier stage. A maximum output pulse energy of ~860 µJ was achieved for ~100 nanosecond pulses at 25 kHz with user defined pulse shape for both radial and azimuthal polarization states. The polarization purity and beam propagation factor (M2) were measured to be >12dB and 2.2 respectively
|Digital Object Identifier (DOI):||doi:10.1364/OL.99.099999|
|Organisations:||Optoelectronics Research Centre|
|Date Deposited:||09 Feb 2017 13:54|
|Last Modified:||17 Apr 2017 00:18|
|Further Information:||Google Scholar|
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