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http://dx.doi.org/10.3807/KJOP.2006.17.2.143

Measurement of Brillouin Gain Spectrum of Optical Fiber Using Direct Optical Frequency Modulation of Laser Diode  

Seo, Min-Sung (Department of Physics, Chonbuk National University)
Yun, Seung-Chul (Department of Physics, Chonbuk National University)
Park, Hee-Gap (Department of Physics, Chonbuk National University)
Publication Information
Korean Journal of Optics and Photonics / v.17, no.2, 2006 , pp. 143-148 More about this Journal
Abstract
A new method of measuring the Brillouin gain spectrum of optical fiber is proposed and demonstrated. Unlike existing methods, both the pump light and the counter-propagating probe light are generated from a single laser diode whose optical frequency is directly modulated by injection current modulation. The frequency difference between the pump and the probe is scanned continuously through optical frequency chirp occurring when the injection current is modulated with a square wave. The measured Brillouin gain spectrum of telecom single-mode fiber agrees well with that shown in other literature.
Keywords
Optical fiber; Brillouin scattering; Brillouin gain; Optical frequency modulation;
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