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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 18 — Sep. 9, 2013
  • pp: 21113–21118

Tuneable Gaussian to flat-top resonator by amplitude beam shaping

Sandile Ngcobo, Kamel Ait-Ameur, Igor Litvin, Abdelkrim Hasnaoui, and Andrew Forbes  »View Author Affiliations

Optics Express, Vol. 21, Issue 18, pp. 21113-21118 (2013)

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We outline a simple laser cavity comprising an opaque ring and a circular aperture that is capable of producing spatially tuneable laser modes, from a Gaussian beam to a Flat-top beam. The tuneability is achieved by varying the diameter of the aperture and thus requires no realignment of the cavity. We demonstrate this principle using a digital laser with an intra-cavity spatial light modulator, and confirm the predicted properties of the resonator experimentally.

© 2013 OSA

OCIS Codes
(140.3300) Lasers and laser optics : Laser beam shaping
(140.3410) Lasers and laser optics : Laser resonators
(070.3185) Fourier optics and signal processing : Invariant optical fields
(070.6120) Fourier optics and signal processing : Spatial light modulators

ToC Category:
Fourier Optics and Signal Processing

Original Manuscript: July 10, 2013
Revised Manuscript: August 19, 2013
Manuscript Accepted: August 23, 2013
Published: September 3, 2013

Sandile Ngcobo, Kamel Ait-Ameur, Igor Litvin, Abdelkrim Hasnaoui, and Andrew Forbes, "Tuneable Gaussian to flat-top resonator by amplitude beam shaping," Opt. Express 21, 21113-21118 (2013)

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