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

• Main Authors: Sulaiman, A., Harun, Sulaiman Wadi, Ahmad, F., Arof, Hamzah, Ahmad, Harith
• Format: Article
• Language: English
• Published: 2012
• Subjects: TA Engineering (General). Civil engineering (General)
• Online Access: http://eprints.um.edu.my/10375/1/Dual-wavelength_laser_generation_using.pdf; http://eprints.um.edu.my/10375/

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 mm, 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 228.1 and 227.1 dBm, respectively. Both laser output is stable with a signal-to-noise ratio of more than 18.5 dB at room temperature.