A Stable Multiwavelength SOA-Based Fiber Ring Laser
with Ultra-Narrow Wavelength Spacing¹

P. C. Peng^a, *, A. L. Tsou^b, H. H. Yee^b, H. Y. Wang^a, and H. H. Lu^{a, c}

^a Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan, R.O.C.

^b Department of Electrical Engineering, National Taipei University of Technology, Taipei, Taiwan, R.O.C.

^c Department of Information Technology and Communication, Tungnan University, New Taipei City, Taiwan, R.O.C.

*e-mail: pcpeng@ntut.edu.tw

Received November 15, 2010; in final form, August 9, 2011; published online November 28, 2011

Abstract—This investigation demonstrates a stable multiwavelength fiber ring laser with ultra-narrow wave-
length spacing using a semiconductor optical amplifier (SOA). A delay interferometer and a mirror are used as
a double-pass interferometer to improve the signal-to-noise ratio in this experiment. Up to 181 stable lasing
wavelengths with a wavelength spacing of 10.7 GHz and a signal-to-noise ratio of over 24 dB are produced at
room temperature.

10.1134/S1054660X12010148

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