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.
Original language | English |
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Title of host publication | Modern Technologies in Space- and Ground-Based Telescopes and Instrumentation II |
Editors | Ramón Navarro, Colin R. Cunningham, Eric Prieto |
Place of Publication | Bellingham, Washington |
Publisher | SPIE |
Pages | 1-8 |
Number of pages | 8 |
Volume | 8450 |
ISBN (Print) | 9780819491510 |
DOIs | |
Publication status | Published - 2012 |
Event | Modern Technologies in Space- and Ground-Based Telescopes and Instrumentation II - Amsterdam, Netherlands Duration: 1 Jul 2012 → 6 Jul 2012 |
Other
Other | Modern Technologies in Space- and Ground-Based Telescopes and Instrumentation II |
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Country/Territory | Netherlands |
City | Amsterdam |
Period | 1/07/12 → 6/07/12 |
Keywords
- astrophotonics
- photonic lanterns
- ultrafast direct write
- multimode waveguides