Diffraction-limited dark laser spot produced by a hollow optical fiber

Yong Il Shin, Kihwan Kim, Jong An Kim, Heung Ryoul Noh, Wonho Jhe, Kyunghwan Oh, Un Chul Paek

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


By using the diffracted field of the LP11 mode of a hollow-core optical fiber, we have produced a micrometer-sized, focused dark laser spot in the near field of the fiber. The minimum half-width of the dark spot is less than 1 μm. In particular, by masking the hollow core and metal coating the cladding with a microsphere, we blocked the light propagating in the cladding and obtained a clean dark spot, which may be useful in atom-optical experiments such as with atomic lenses, atom traps, and atom switches.

Original languageEnglish
Pages (from-to)119-121
Number of pages3
JournalOptics Letters
Issue number3
Publication statusPublished - 2001 Feb 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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