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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 11 — May. 24, 2010
  • pp: 11008–11014

Passive mode-locked lasing by injecting a carbon nanotube-solution in the core of an optical fiber

Amos Martinez, Kaiming Zhou, Ian Bennion, and Shinji Yamashita  »View Author Affiliations

Optics Express, Vol. 18, Issue 11, pp. 11008-11014 (2010)

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In this paper, we propose a saturable absorber (SA) device consisting on an in-fiber micro-slot inscribed by femtosecond laser micro fabrication, filled by a dispersion of Carbon Nanotubes (CNT). Due to the flexibility of the fabrication method, efficient and simple integration of the mode-locking device directly into the optical fiber is achieved. Furthermore, the fabrication process offers a high level of control over the dimensions and location of the micro-slots. We apply this fabrication flexibility to extend the interaction length between the CNT and the propagating optical field along the optical fiber, hence enhancing the nonlinearity of the device. Furthermore, the method allows the fabrication of devices that operate by either a direct field interaction (when the central peak of the propagating optical mode passes through the nonlinear media) or an evanescent field interaction (only a fraction of the optical mode interacts with the CNT). In this paper, several devices with different interaction lengths and interaction regimes are investigated. Self-starting passively modelocked laser operation with an enhanced nonlinear interaction is observed using CNT-based SAs in both interaction regimes. This method constitutes a simple and suitable approach to integrate the CNT into the optical system as well as enhancing the optical nonlinearity of CNT-based photonic devices.

© 2010 OSA

OCIS Codes
(140.4050) Lasers and laser optics : Mode-locked lasers
(190.4400) Nonlinear optics : Nonlinear optics, materials

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 5, 2010
Revised Manuscript: April 27, 2010
Manuscript Accepted: April 27, 2010
Published: May 11, 2010

Amos Martinez, Kaiming Zhou, Ian Bennion, and Shinji Yamashita, "Passive mode-locked lasing by injecting a carbon nanotube-solution in the core of an optical fiber," Opt. Express 18, 11008-11014 (2010)

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