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Demonstration of a photonic lantern low order wavefront sensor using an adaptive optics testbed
Instrumentation and Methods for Astrophysics · Submitted 21 Sep 2018
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim By replacing a single mode (SM) fiber with the PL we show that it is possible to stabilize the input PSF to an instrument due to non-common path tip/tilt aberrations in an adaptive optics system.
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The abstract, sentence by sentence
We demonstrate the use of an optimized 5 core photonic lantern (PL) to simultaneously measure tip/tilt errors at the telescope focal plane, while also providing the input to an instrument. By replacing a single mode (SM) fiber with the PL we show that it is possible to stabilize the input PSF to an instrument due to non-common path tip/tilt aberrations in an adaptive optics system. We show the PL in two different regimes, (i) using only the outer cores for tip/tilt measurements while feeding an instrument with the central core and, (ii) using all cores to measure tip/tilt when used in an instrument such as a spectrograph. In simulations our PL displays the ability to retrieve tip/tilt measurements in a linear range of +/- 55 milliarcseconds. At the designed central wavelength of 1.55 microns, configuration (i) matches the throughput of an on-axis SM fiber but declines as we move away from this wavelength. In configuration (ii) we make use of the whole multimode input of the PL resulting in a potential increase of overall throughput compared to a SM fiber, while eliminating modal noise.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We demonstrate the use of an optimized 5 core photonic lantern (PL) to simultaneously measure tip/tilt errors at the telescope focal plane, while also providing the input to an instrument. | contribution 1.00 | 0.95 | 0.46 | asserted 1.00 |
| s1 | By replacing a single mode (SM) fiber with the PL we show that it is possible to stabilize the input PSF to an instrument due to non-common path tip/tilt aberrations in an adaptive optics system. | result 0.64 | 0.92 | 0.55 | asserted 0.81 |
| s2 | We show the PL in two different regimes, (i) using only the outer cores for tip/tilt measurements while feeding an instrument with the central core and, (ii) using all cores to measure tip/tilt when used in an instrument such as a spectrograph. | method 0.67 | 0.90 | 0.16 | asserted 1.00 |
| s3 | In simulations our PL displays the ability to retrieve tip/tilt measurements in a linear range of +/- 55 milliarcseconds. | result 1.00 | 0.84 | 0.12 | asserted 0.69 |
| s4 | At the designed central wavelength of 1.55 microns, configuration (i) matches the throughput of an on-axis SM fiber but declines as we move away from this wavelength. | result 0.74 | 0.78 | 0.05 | asserted 1.00 |
| s5 | In configuration (ii) we make use of the whole multimode input of the PL resulting in a potential increase of overall throughput compared to a SM fiber, while eliminating modal noise. | result 0.68 | 0.76 | 0.17 | hedged possibility 0.85 |
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Original abstract
We demonstrate the use of an optimized 5 core photonic lantern (PL) to simultaneously measure tip/tilt errors at the telescope focal plane, while also providing the input to an instrument. By replacing a single mode (SM) fiber with the PL we show that it is possible to stabilize the input PSF to an instrument due to non-common path tip/tilt aberrations in an adaptive optics system. We show the PL in two different regimes, (i) using only the outer cores for tip/tilt measurements while feeding an instrument with the central core and, (ii) using all cores to measure tip/tilt when used in an instrument such as a spectrograph. In simulations our PL displays the ability to retrieve tip/tilt measurements in a linear range of +/- 55 milliarcseconds. At the designed central wavelength of 1.55 microns, configuration (i) matches the throughput of an on-axis SM fiber but declines as we move away from this wavelength. In configuration (ii) we make use of the whole multimode input of the PL resulting in a potential increase of overall throughput compared to a SM fiber, while eliminating modal noise.
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