Abstract
Q-switched erbium doped fiber laser was demonstrated using antimony telluride (Sb2 Te3 ) as saturable absorber (SA). The SA was fabricated by adding Sb3Te2 powder into PVA suspension and left dry in room temperature for two days. Then, the SA was sandwiched in between two FC/PC fiber ferrules, which can provide easy integration and flexibility into the laser cavity. Stable and self-started Q-switched laser operates at 1531 nm center wavelength. The laser repetition rate increased from 54.5 kHz to 88.4 kHz and pulse duration decreased from 6.84 μs to 4.58 μs as the pump power increased. A signal to noise ratio value of 55 dB was achieved at pump power 130 mW. At the maximum pump power, the average output power and pulse energy are 0.26 mW and 2.78 nJ.
Highlights
Topological insulator materials has captured many research interest due to the outstanding mechanical, electronic and optical properties that are highly promising in a variety of potential applications, for example electronics [1], fiber laser [2,3], solar cell [4] and automotive [4]
We successfully demonstrated generation of Q-switched EDFL using Sb2Te3 based saturable absorber (SA)
The light is extracted from the cavity by 90/10 coupler, 90% of the lights are propagates in the cavity and 10 % are used for output
Summary
Topological insulator materials has captured many research interest due to the outstanding mechanical, electronic and optical properties that are highly promising in a variety of potential applications, for example electronics [1], fiber laser [2,3], solar cell [4] and automotive [4]. Saturable absorber (SA) are incorporated to modulate the loss in the fiber laser cavity. This simple and low cost techniques can generate a stable pulse depending the on pump power to tune the pulse repetition rate [9]. To embed into PVA polymer, using powder is a suitable ways in order to ensure the Sb2Te3 strongly bind with the polymer. Using this method, concentration and thickness of the SA can be controlled. The Sb2Te3 SA embedded in PVA thin film was sandwiched in between FC/PC fiber ferrule to generate stable pulsed
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