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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 16 — Aug. 15, 2014
  • pp: 4820–4822

Ultrafast laser inscription of mid-IR directional couplers for stellar interferometry

Alexander Arriola, Sebabrata Mukherjee, Debaditya Choudhury, Lucas Labadie, and Robert R. Thomson  »View Author Affiliations


Optics Letters, Vol. 39, Issue 16, pp. 4820-4822 (2014)
http://dx.doi.org/10.1364/OL.39.004820


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Abstract

We report the ultrafast laser fabrication and mid-IR characterization (3.39 μm) of four-port evanescent field directional couplers. The couplers were fabricated in a commercial gallium lanthanum sulfide glass substrate using sub-picosecond laser pulses of 1030 nm light. Straight waveguides inscribed using optimal fabrication parameters were found to exhibit propagation losses of 0.8dB·cm1. A series of couplers were inscribed with different interaction lengths, and we demonstrate power-splitting ratios of between 8% and 99% for mid-IR light with a wavelength of 3.39 μm. These results clearly demonstrate that ultrafast laser inscription can be used to fabricate high-quality evanescent field couplers for future applications in astronomical interferometry.

© 2014 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(220.4000) Optical design and fabrication : Microstructure fabrication
(130.2755) Integrated optics : Glass waveguides

ToC Category:
Integrated Optics

History
Original Manuscript: May 27, 2014
Revised Manuscript: July 11, 2014
Manuscript Accepted: July 16, 2014
Published: August 11, 2014

Citation
Alexander Arriola, Sebabrata Mukherjee, Debaditya Choudhury, Lucas Labadie, and Robert R. Thomson, "Ultrafast laser inscription of mid-IR directional couplers for stellar interferometry," Opt. Lett. 39, 4820-4822 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-16-4820

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