Multiwavelength Erbium-Doped Fiber Laser Using Twin-Core
Photonic Crystal Fiber1
B. K. Kim and Y. Chung
Department of Information and Communications, Graduate Program of Photonics and Applied Physics,
Gwangju Institute of Science and Technology, 261 Chemdan-gwagiro (Oryong-dong),
Buk-gu, Gwangju 500-712, The Republic of Korea
e-mail: photonicrystalfiber@gmail.com
Received December 4, 2011; in final form, December 8, 2011; published online April 3, 2012
Abstract—We propose a novel multiwavelength erbium-doped fiber laser incorporating a twin-core photonic
crystal fiber (TC-PCF) based Mach–Zehnder interferometer (MZI). TC-PCF based Mach–Zehnder interferom-
eter acts as a wavelength-selective comb filter in the laser cavity and shows polarization dependent spectral
response. The obtained channeled spectrum can be switched between two operation modes with two different
multiwavelength intervals. The lasing wavelength spacing could be switched by adjusting internal polarization
controllers in the ring cavity. The proposed fiber laser can operate with two typical lasing wavelength spacing
of 1.60 and 3.27 nm with a signal-to-noise ratio (SNR) over 30 dB. The temporal stability of laser output was
also investigated.
DOI: 10.1134/S1054660X1205012X
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