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  • 标题:Fast laser speckle suppression with an intracavity diffuser
  • 本地全文:下载
  • 作者:Simon Mahler ; Yaniv Eliezer ; Hasan Yılmaz
  • 期刊名称:Nanophotonics
  • 印刷版ISSN:2192-8606
  • 电子版ISSN:2192-8614
  • 出版年度:2020
  • 卷号:-1
  • 期号:ahead-of-print
  • DOI:10.1515/nanoph-2020-0390
  • 出版社:Walter de Gruyter GmbH
  • 摘要:Fast speckle suppression is crucial for time-resolved full-field imaging with laser illumination. Here, we introduce a method to accelerate the spatial decoherence of laser emission, achieving speckle suppression in the nanosecond integration time scale. The method relies on the insertion of an intracavity phase diffuser into a degenerate cavity laser to break the frequency degeneracy of transverse modes and broaden the lasing spectrum. The ultrafast decoherence of laser emission results in the reduction of speckle contrast to 3% in less than 1 ns.
  • 关键词:optical coherence ; optics and lasers ; laser dynamics ; speckle
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