Linearly polarized, Q-switched, erbium-doped fiber laser incorporating a bulk-structured bismuth telluride/polyvinyl alcohol saturable absorber

Jinho Lee; Junsu Lee; Joonhoi Koo; Hojai Chung; Ju Han Lee

doi:10.1117/1.OE.55.7.076109

19 July 2016 Linearly polarized, Q-switched, erbium-doped fiber laser incorporating a bulk-structured bismuth telluride/polyvinyl alcohol saturable absorber

Jinho Lee, Junsu Lee, Joonhoi Koo, Hojai Chung, Ju Han Lee

Author Affiliations +

Funded by: Korea government (MSIP)

Optical Engineering, Vol. 55, Issue 7, 076109 (July 2016). https://doi.org/10.1117/1.OE.55.7.076109

Abstract

We experimentally demonstrate a linearly polarized, passively Q-switched, erbium (Er)-doped fiber laser using a saturable absorber (SA) based on a composite consisting of a bulk-structured bismuth telluride (Bi₂Te₃) topological insulator (TI) and polyvinyl alcohol (PVA). The SA was constructed on a polarization maintaining (PM) fiber ferrule platform, which had a sandwich structure. Its saturation intensity and modulation depth were measured to be ∼47.56 MW/cm² and ∼4.1%, respectively. Using the prepared Bi₂Te₃/PVA SA in a PM Er-doped fiber ring laser, stable Q-switched pulses with a degree of polarization of ∼98.6% and an azimuth angle of ∼−0.34 deg were demonstrated. The minimum pulse width was measured to be ∼1.58 μs at a repetition rate of 47.1 kHz. This experimental demonstration verifies that a thin film based on a bulk-structured Bi₂Te₃ TI can fit into a sandwich-structured SA based on PM fiber ferrules.

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Jinho Lee, Junsu Lee, Joonhoi Koo, Hojai Chung, and Ju Han Lee "Linearly polarized, Q-switched, erbium-doped fiber laser incorporating a bulk-structured bismuth telluride/polyvinyl alcohol saturable absorber," Optical Engineering 55(7), 076109 (19 July 2016). https://doi.org/10.1117/1.OE.55.7.076109

Published: 19 July 2016

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