Visible ns-pulse laser oscillation in Pr-doped double-clad structured waterproof fluoride glass fibre with SESAM

Abstract

A visible Q-switched pulse train at 639 nm was successfully generated in a Pr-doped double-clad structured waterproof fluoride glass fibre with a semiconductor saturable absorber mirror. The slope efficiency was calculated as 36.3%. The pulse duration and the radio frequency were measured as 270 ns and 107 kHz at 596 mW of absorbed power, respectively. The pulse energy and the pulse peak power were calculated as 1.32 μJ and 4.87 W, respectively.

Keywords

• fibre lasers
• glass fibres
• optical glass
• Q-switching
• optical pulse generation
• optical saturable absorption
• laser mirrors
• laser beams
• fluoride glasses
• praseodymium
• pulse peak power
• pulse energy
• absorbed power
• radio frequency
• pulse duration
• slope efficiency
• visible Q-switched pulse train generation
• semiconductor saturable absorber mirror
• SESAM
• Pr-doped double-clad structured waterproof fluoride glass fibre
• visible ns-pulse laser oscillation
• wavelength 639 nm
• efficiency 36.3 percent
• time 270 ns
• frequency 107 kHz
• power 596 mW
• energy 1.32 muJ