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

Full Article  |  PDF Article
OSA Recommended Articles
Low loss mid-infrared ZBLAN waveguides for future astronomical applications

Simon Gross, Nemanja Jovanovic, Adam Sharp, Michael Ireland, Jon Lawrence, and Michael J. Withford
Opt. Express 23(6) 7946-7956 (2015)

Ultrafast laser inscription in chalcogenide glass: thermal versus athermal fabrication

Thomas Gretzinger, Simon Gross, Martin Ams, Alexander Arriola, and Michael J. Withford
Opt. Mater. Express 5(12) 2862-2877 (2015)

Mid-infrared spectral broadening in an ultrafast laser inscribed gallium lanthanum sulphide waveguide

John E. McCarthy, Henry T. Bookey, Nicholas D. Psaila, Robert R. Thomson, and Ajoy K. Kar
Opt. Express 20(2) 1545-1551 (2012)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription