H. Ahmad, B. Nizamani, A. Bencheikh
This work reports higher order LP11 modes in ultrafast mode-locked fiber laser at the O-band regime. The mode-locking was achieved by using bismuth telluride (Bi2Te3) as an optical modulator in a praseodymium-doped fluoride fiber (PDFF) laser which operates at 1300.5 nm. Bi2Te3 was prepared by liquid phase exfoliation (LPE) process and then it was drop-casted onto the arc-shaped fiber, which behaves as an optical modulator. The mode-locking was obtained within the pump power range of 106.8 to 133.2 mW. The pulse repetition rate was at 0.407 MHz with a signal-to-noise ratio (SNR) of 53.4 dB. The ultrafast pulses of 890 fs duration with a pulse energy of 2.4 nJ were achieved. At the output, by using the offset splice spot (OSS) technique the higher-order modes were excited in the two-mode fiber (TMF). These higher-order modes were LP11 modes with a two-lobe structure visualized using the Thorlabs beam profiler. © 1965-2012 IEEE.
Universiti Malaya, Photonics Research Centre, Physics Department, Faculty of Science, Kuala Lumpur, 50603, Malaysia; Universitas Negeri Malang, Faculty of Mathematics and Natural Sciences, Department of Physics, Malang, 65145, Indonesia; Universiti Malaya, Photonics Research Centre, Kuala Lumpur, 50603, Malaysia; Setif 1 University, Applied Optics Laboratory, Institute of Optics and Precision Mechanics, Setif, 19000, Algeria; University Mohamed El Bachir El Ibrahimi of Bordj Bou Arréridj, Faculty of Sciences and Technology, Department of Electromechanics, Bordj Bou Arréridj, 34000, Algeria
