Enabling photonic technologies for seeing-limited telescopes:
fabrication of integrated photonic lanterns on a chip

Izabela Spaleniak; Nemanja Jovanovic; Simon Gross; Michael Ireland; Jon Lawrence; Michael Withford

doi:10.1117/12.925264

13 September 2012 Enabling photonic technologies for seeing-limited telescopes: fabrication of integrated photonic lanterns on a chip

Izabela Spaleniak, Nemanja Jovanovic, Simon Gross, Michael Ireland, Jon Lawrence, Michael Withford

Author Affiliations +

Proceedings Volume 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II; 845015 (2012) https://doi.org/10.1117/12.925264
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

In this paper we present theoretical and laboratory results on integrated directly-written photonic lanterns with varying taper lengths. These lanterns convert seeing-limited light into multiple diffraction limited signals, in other words, a multimode signal into multiple single-mode signals. We investigated 19-channel structures which were written within a 30-mm-long glass block and designed to operate at 1550 nm. A single structure consisted of a multimode waveguide which transitioned into an array of single-mode waveguides and then back to a multimode waveguide utilizing cosine taper transitions. Based on simulations we found that transition lengths of 6 mm were sufficient to obtain throughput at a level of ~95%. Fabricated devices showed losses (coupling and transition losses) at the level of 30% for injection F/# < 5 and taper lengths < 5 mm. We believe that such devices show great promise for future use in astronomy.

Citation Download Citation

Izabela Spaleniak, Nemanja Jovanovic, Simon Gross, Michael Ireland, Jon Lawrence, and Michael Withford "Enabling photonic technologies for seeing-limited telescopes: fabrication of integrated photonic lanterns on a chip", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 845015 (13 September 2012); https://doi.org/10.1117/12.925264

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