Lasers, Fiber Optics, and Communications

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

[+] Author Affiliations
Jinho Lee, Junsu Lee, Joonhoi Koo, Hojai Chung, Ju Han Lee

University of Seoul, School of Electrical and Computer Engineering, 163 Seoulsiripdae-ro, Dongdaemun-gu, Seoul 02504, Republic of Korea

Opt. Eng. 55(7), 076109 (Jul 19, 2016). doi:10.1117/1.OE.55.7.076109
History: Received April 3, 2016; Accepted July 1, 2016
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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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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

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", Opt. Eng. 55(7), 076109 (Jul 19, 2016). ; http://dx.doi.org/10.1117/1.OE.55.7.076109


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