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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 31, Iss. 9 — Sep. 1, 2014
  • pp: 2157–2162

Passively Q-switched 1.56  μm all-fiberized laser based on evanescent field interaction with bulk-structured bismuth telluride topological insulator

Joonhoi Koo, Junsu Lee, Cheolhwan Chi, and Ju Han Lee  »View Author Affiliations


JOSA B, Vol. 31, Issue 9, pp. 2157-2162 (2014)
http://dx.doi.org/10.1364/JOSAB.31.002157


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Abstract

We experimentally investigated the use of a bulk-structured bismuth telluride (Bi2Te3) topological insulator (TI) as a saturable absorption material for passive Q-switching of a fiber laser at 1.56μm. Unlike previous TI-based Q-switched laser implementations that employed high-quality nanostructured TI saturable absorbers, we chose to use a bulk-structured Bi2Te3 TI film because it is easy to fabricate. Our saturable absorber was constructed by depositing a bulk-structured, 13μm thick Bi2Te3 TI film, which was prepared by using a mechanical exfoliation method, on the flat side of a side-polished fiber. The modulation depth of the evanescent field interaction-based saturable absorber was measured to be 10.8% at 1.56μm. Passively Q-switched pulses were readily obtained by incorporating the saturable absorber into an all fiberized erbium fiber-based ring cavity. The minimum temporal width was measured to be 2.81μs at a repetition rate of 42.8kHz. Through an output performance comparison between our Q-switched laser and recently demonstrated Q-switched fiber lasers incorporating nanostructured TI-based saturable absorbers, the pros and cons of our bulk-structured Bi2Te3 TI-based saturable absorbers were analyzed.

© 2014 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3540) Lasers and laser optics : Lasers, Q-switched
(160.4330) Materials : Nonlinear optical materials

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: April 8, 2014
Revised Manuscript: July 28, 2014
Manuscript Accepted: July 31, 2014
Published: August 25, 2014

Citation
Joonhoi Koo, Junsu Lee, Cheolhwan Chi, and Ju Han Lee, "Passively Q-switched 1.56  μm all-fiberized laser based on evanescent field interaction with bulk-structured bismuth telluride topological insulator," J. Opt. Soc. Am. B 31, 2157-2162 (2014)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-31-9-2157

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