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Dual-wavelength laser generation using highly concentrated erbium-doped fibre coupling with microfibre knot resonator

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5 Author(s)
Sulaiman, A. ; Dept. of Electr. Eng., Univ. of Malaya, Kuala Lumpur, Malaysia ; Harun, S.W. ; Ahmad, F. ; Arof, H.
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A dual-wavelength fibre laser is demonstrated using a 2 m-long erbium-doped fibre (EDF) with a microfibre knot resonator (MKR) structure at the output end. The MKR is fabricated by heating and stretching an EDF to form a microfibre with diameter of around 2 m, which is then manipulated to create a knot. At a loop diameter of 2 mm for the MKR, dual-wavelength laser is obtained at 1533.8 and 1555.4 nm with peak powers of 28.1 and 27.1 dBm, respectively. Both laser output is stable with a signal-to-noise ratio of more than 18.5 dB at room temperature.

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Electronics Letters  (Volume:48 ,  Issue: 5 )