A simple single-mode fiber loss measurement scheme in the C-band based on fiber loop-cavity ringdown spectroscopy

Berberoglu H., ALTAN H.

OPTICS COMMUNICATIONS, vol.317, pp.29-33, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 317
  • Publication Date: 2014
  • Doi Number: 10.1016/j.optcom.2013.12.019
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.29-33
  • Middle East Technical University Affiliated: Yes


An extremely sensitive and simple fiber loop-cavity ringdown spectroscopy (FL-CRDS) setup has been designed based on a turn-key nanosecond pulse laser source operating at 1535 nm. The system sensitivity is demonstrated to be approximately 0.01 dB after extracting the characteristic macrobend loss curve of a standard single mode fiber (SMF-28). The experiment demonstrated that the oscillatory behavior in the rapid loss due to the increasing curvature could be seen for single turn bare fibers with radii of curvature from 10-20 mm. Since the wavelength of laser lies in the range of the conventional window, known as C-band, the demonstrated scheme may suggest the use of these techniques in versatile applications where quick results are necessary without the system complexity. (C) 2013 Elsevier B.V. All rights reserved.