Source Wavefront Generation for a Non-Interferometric Reconfigurable Null Test using a Photonic Lantern

Abstract

A method is presented to use a fiber-optic device known as a photonic lantern to generate a reconfigurable custom wavefront for a null test of spherical, aspheric, and freeform optical surfaces. By modulating input intensity and phases at single mode fiber input ports, the wavefront of the output light field from the multimode end can be controlled to generate a custom nulling phase function. Generation of a desired wavefront is demonstrated by simulating a nineteen-port non-mode-selective photonic lantern. Using a linear response-matrix approach, a phase function with an RMS error of 44 nm from the target was generated in simulation. A compact form-factor noninterferometric null test for freeform optical surfaces is then described utilizing the photonic lantern as both a reconfigurable nulling source and a wavefront sensor.

4 pages, 8 figures, submitted to Optics Letters

References in corpus (9)

• The Photonic Lantern
• Roadmap on Wavefront Shaping and deep imaging in complex media
• Photonic Lantern
• Power-Efficient Silicon Nitride Thermo-Optic Phase Shifters for Visible Light
• An all-photonic focal-plane wavefront sensor
• 2023 Astrophotonics Roadmap: pathways to realizing multi-functional integrated astrophotonic instruments
• Compressive optical imaging with a photonic lantern
• Focal-plane wavefront sensing with photonic lanterns I: theoretical framework
• Demonstration of a photonic lantern low order wavefront sensor using an adaptive optics testbed