Integrated photonic building blocks for nextgeneration astronomical instrumentation II: The multimode to single mode transition

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

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

There are numerous advantages to exploiting diffraction-limited instrumentation at astronomical observatories, which include smaller footprints, less mechanical and thermal instabilities and high levels of performance. To realize such instrumentation it is imperative to convert the atmospheric seeing-limited signal that is captured by the telescope into a diffraction-limited signal. This process can be achieved photonically by using a mode reformatting device known as a photonic lantern that performs a multimode to single-mode transition. With the aim of developing an optimized integrated photonic lantern, we undertook a systematic parameter scan of devices fabricated by the femtosecond laser direct-write technique. The devices were designed for operation around 1.55 μm. The devices showed (coupling and transition) losses of less than 5% for F/# ≥ 12 injection and the total device throughput (including substrate absorption) as high as 75-80%. Such devices show great promise for future use in astronomy.

Original languageEnglish
Pages (from-to)27197-27208
Number of pages12
JournalOptics Express
Volume21
Issue number22
DOIs
Publication statusPublished - 4 Nov 2013

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