Journal
OPTICAL ENGINEERING
Volume 55, Issue 7, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.OE.55.7.076109
Keywords
fiber lasers; Q-switching; optical device; bismuth telluride; topological insulator
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Funding
- Korean Ministry of Trade, Industry and Energy within the project, Development of Process and Equipment Technology to Engrave Roll Molds with 10-micron Scale Line Width using a Pulse-width Tunable Ultrafast Laser [10048726]
- National Research Foundation of Korea (NRF) - Korea Government (Ministry of Science, ICT, and Future Planning), Republic of Korea [NRF-2015R1A2A2A04006979]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10048726] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [22A20152213124] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 similar to 47.56 MW/cm(2) and similar to 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 similar to 98.6% and an azimuth angle of similar to -0.34 deg were demonstrated. The minimum pulse width was measured to be similar to 1.58 mu s 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. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).
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