T. Wang, G. Liang, X. Miao, X. Zhou, and Q. Li
Institute of Communication and Information System, College of Communication Engineering,
Hangzhou Dianzi University, Hangzhou, 310018 China
e-mail: tianshuw@hdu.edu.cn
Received November 17, 2011; in final form, November 25, 2011; published online April 3, 2012
Abstract—We demonstrate a simple dual-wavelength ring erbium-doped fiber laser operating in single-longi-
tudinal-mode (SLM) at room temperature. A pair of reflection type short-period fiber Bragg gratings (FBGs),
which have two different center wavelengths of 1545.072 and 1545.284 nm, are used as the wavelength-selec-
tive component of the laser. A segment of unpumped polarization maintaining erbium-doped fiber (PM-EDF)
is acted as a narrow multiband filter. By turning the polarization controller (PC) to enhance the polarization hole
burning (PHB), the single-wavelength and dual-wavelength laser oscillations are observed at 1545.072 and
1545.284 nm. The output power variation is less than 0.6 dB for both wavelengths over a five-minute period
and the optical signal to noise ratio (OSNR) is greater than 50 dB. By beating the dual-wavelengths at a photo-
detector (PD), a microwave signal at 26.44 GHz is demonstrated.
DOI: 10.1134/S1054660X1205026X
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