A laser testbed based on active coherent beam combination (CBC) of seven 1.5 µm, 3 W
fiber amplifiers was developed for applications requiring high power such as power density …

The application of large-aperture telescopes requires the support of co-phase measurement
techniques for segmented mirrors. This paper proposes a novel method to detect the co …

Interferometric methods for phasing the primary mirrors of segmented-mirror telescopes
generally need to make measurements at multiple wavelengths in order to achieve suitably …

Context—The Large Interferometer for Exoplanets (LIFE) is a proposed space mission to
characterise the atmosphere of terrestrial exoplanets, which is planned to operate in the mid …

One of the most promising solutions to access high power laser chains is to achieve a
coherent combination of a large number of elementary lasers. To interfere constructively …

This paper presents a simple slit-mask-based sensing scheme that can be applied to a
robust piston error sensor for segmented optical systems, even in space. Utilizing crossed …

We present a new interferometer to measure piston, tip and tilt of segmented mirrors, using
the combination of an optical grating and a microlens array. Since this interferometer is able …

The design of extremely large segmented-mirror telescopes (ELTs) calls for their segments
to be phased, and a number of different interferometric techniques have been proposed in …

It is imperative to achieve the co-phase state for large segmented mirrors of telescopes. This
paper proposes a novel method for quantifying the co-phase errors of the segmented …

As the loading space in rockets and mirror fabrication technology is limited, optical systems
in space cannot have large optical apertures. However, the successful launch and excellent …