Focus issue introduction: recent advances in astrophotonics

Area of Science:

• * Astrophotonics: The intersection of astronomy and photonics.

Background:

• * The inaugural Optics Express Focus Issue on Astrophotonics was published in 2009.
• * The field has since undergone substantial growth and development.
• * Astrophotonic systems are now routinely tested on major global telescopes.

Purpose of the Study:

• * To document significant advancements in astrophotonics.
• * To provide insight into the future trajectory of the field.

Main Methods:

• * Review of recent developments in astrophotonic systems.
• * Analysis of ongoing tests and applications on large astronomical telescopes.

Main Results:

• * Demonstration of routine testing of pathfinder astrophotonic systems globally.
• * Identification of key technological and scientific progress within the field.

Conclusions:

• * Astrophotonics is a rapidly advancing field with ongoing innovation.
• * Future directions point towards continued integration with large-scale astronomical observatories.