A non-adiabatic microfiber coupler is fabricated by flame brushing technique and then theoretically and experimentally analyzed. The effective length of the microfiber coupler is determined by simulation, and a low-noise laser is demonstrated using various lengths of erbium-doped fiber (EDF) when incorporated in a laser setup. At 18.6-mW input pump power, the maximum output power of 20 \mu W and the lowest lasing threshold of 3.8 mW are obtained with a 90-cm-long EDF.
© 2014 Chinese Optics Letters
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(140.0140) Lasers and laser optics : Lasers and laser optics
(190.0190) Nonlinear optics : Nonlinear optics
Lasers and Laser Optics
Azlan Sulaiman, Sulaiman Wadi Harun, and Harith Ahmad, "Ring microfiber coupler erbium-doped fiber laser analysis," Chin. Opt. Lett. 12, 021403- (2014)