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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 9 — Apr. 23, 2012
  • pp: 9991–9998

Intra-cavity gain shaping of mode-locked Ti:Sapphire laser oscillations

Shai Yefet, Na’aman Amer, and Avi Pe’er  »View Author Affiliations


Optics Express, Vol. 20, Issue 9, pp. 9991-9998 (2012)
http://dx.doi.org/10.1364/OE.20.009991


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Abstract

The gain properties of an oscillator strongly affect its behavior. When the gain is homogeneous, different modes compete for gain resources in a ‘winner takes all’ manner, whereas with inhomogeneous gain, modes can coexist if they utilize different gain resources. We demonstrate precise control over the mode competition in a mode locked Ti:sapphire oscillator by manipulation and spectral shaping of the gain properties, thus steering the competition towards a desired, otherwise inaccessible, oscillation. Specifically, by adding a small amount of spectrally shaped inhomogeneous gain to the standard homogeneous gain oscillator, we selectively enhance a desired two-color oscillation, which is inherently unstable to mode competition and could not exist in a purely homogeneous gain oscillator. By tuning the parameters of the additional inhomogeneous gain we flexibly control the center wavelengths, relative intensities and widths of the two colors.

© 2012 OSA

OCIS Codes
(140.3410) Lasers and laser optics : Laser resonators
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.4050) Lasers and laser optics : Mode-locked lasers
(140.7090) Lasers and laser optics : Ultrafast lasers
(140.3538) Lasers and laser optics : Lasers, pulsed

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: January 4, 2012
Revised Manuscript: April 4, 2012
Manuscript Accepted: April 8, 2012
Published: April 17, 2012

Citation
Shai Yefet, Na’aman Amer, and Avi Pe’er, "Intra-cavity gain shaping of mode-locked Ti:Sapphire laser oscillations," Opt. Express 20, 9991-9998 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-9-9991


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