External line-cavity wavelength-swept source at 850 nm for optical coherence tomography

Sang Won Lee, Chang Seok Kim, Beop Min Kim

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


We constructed a novel and compact wavelength-swept laser source at the 850-nm region using an external line cavity in a modified Littman configuration filter. The angle alignment stability was improved by separating the function of output coupling and the wavelength selection of diffraction grating with gold coating. Our swept source produces laser output at the center wavelength of 849 nm and the average power of 2 mW with the full-width at half-maximum of 48 nm. The system performance is discussed and a two-dimensional image of a biological sample is presented.

Original languageEnglish
Pages (from-to)176-178
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number3
Publication statusPublished - 2007 Feb 1
Externally publishedYes


  • Fiber lasers
  • Optical coherence tomography (OCT)
  • Optical fiber
  • Optical imaging
  • Tunable lasers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


Dive into the research topics of 'External line-cavity wavelength-swept source at 850 nm for optical coherence tomography'. Together they form a unique fingerprint.

Cite this