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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 7 — Mar. 31, 2008
  • pp: 5082–5094

Generation of vortex beams from lasers with controlled Hermite- and Ince-Gaussian modes

Takayuki Ohtomo, Shu-Chun Chu, and Kenju Otsuka  »View Author Affiliations

Optics Express, Vol. 16, Issue 7, pp. 5082-5094 (2008)

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We report selective excitations of higher-order Hermite-Gaussian and Ince-Gaussian (IG) modes in a laser-diode-pumped microchip solid-state laser and controlled generation of corresponding higher-order and multiple optical vortex beams of different shapes using an astigmatic mode converter (AMC). Simply changing the pump-beam diameter, shape, and lateral off-axis position of the tight pump beam focus on the laser crystal within a microchip semispherical cavity can produce the desired optical vortex beams in a well controlled manner. Pattern changes featuring different IG and HG modes obtained by rotating the AMC are also demonstrated. Numerical simulation shows that the vortex structure is changed by controlled off-axis laser diode pumping, which could lead toward precise optical manipulation of small particles.

© 2008 Optical Society of America

OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state
(260.6042) Physical optics : Singular optics

ToC Category:
Physical Optics

Original Manuscript: February 7, 2008
Revised Manuscript: March 18, 2008
Manuscript Accepted: March 24, 2008
Published: March 28, 2008

Takayuki Ohtomo, Shu-Chun Chu, and Kenju Otsuka, "Generation of vortex beams from lasers with controlled Hermite- and Ince-Gaussian modes," Opt. Express 16, 5082-5094 (2008)

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