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A new broadband fiber light source for optical coherence tomography

Liang Yan-Mei Wang Ming-Wei Zhou Da-Chuan Meng Fan-Yong

A new broadband fiber light source for optical coherence tomography

Liang Yan-Mei, Wang Ming-Wei, Zhou Da-Chuan, Meng Fan-Yong
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  • Abstract views:  4193
  • PDF Downloads:  1544
  • Cited By: 0
Publishing process
  • Received Date:  31 May 2006
  • Accepted Date:  23 October 2006
  • Published Online:  05 March 2007

A new broadband fiber light source for optical coherence tomography

  • 1. (1)南开大学现代光学研究所,光电信息技术科学教育部重点实验室,天津 300071; (2)天津爱天光电子科技有限公司,天津 300384

Abstract: A new type of Gaussian-like broadband superfluorescent fiber light source suitable for optical coherence tomography (OCT) is introduced in this paper. Erbium-doped optical fiber simultaneously pumped by 980nm laser diode (LD) and 1480 nm LD is used as the gain medium. Both optical controllers and temperature controllers are employed to adjust the output of LDs and to improve the stability of output power of light source. A fiber coupler with a specific splitting ratio plus multi-stage long period fiber gratings are used to modulate the output spectrum so that the spectral profile of the broadband light source is near Gaussian. The output power is about 27mW with center wavelength at 1.57μm and the bandwidth over 75 nm. The experiment results reveal that the sidelobes of the autocorrelation function of the output spectrum are effectively suppressed, which can meet the need of optical coherence tomography.

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