Fiber-connectorized ultrafast-laser-inscribed K-band integrated optics beam combiner for the CHARA telescope array

Jacopo Siliprandi; David G. MacLachlan; Calum A. Ross; Tarun K. Sharma; Lucas Labadie; Kalaga Madhav; Abani S. Nayak; Aline N. Dinkelaker; Martin M. Roth; Nicholas J. Scott; Vincent Coudé du Foresto; Robert R. Thomson; Aurélien Benoit

doi:10.1364/AO.510293

Fiber-connectorized ultrafast-laser-inscribed K-band integrated optics beam combiner for the CHARA telescope array

Jacopo Siliprandi^*, David G. MacLachlan, Calum A. Ross, Tarun K. Sharma, Lucas Labadie, Kalaga Madhav, Abani S. Nayak, Aline N. Dinkelaker, Martin M. Roth, Nicholas J. Scott, Vincent Coudé du Foresto, Robert R. Thomson, Aurélien Benoit

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

50 Downloads (Pure)

Abstract

A fiber-connectorized K-band integrated-optics two-telescope beam combiner was developed for long-baseline interferometry at the CHARA telescope array utilizing the ultrafast laser inscription (ULI) technique. Single-mode waveguide insertion losses were measured to be ∼1.1 dB over the 2–2.3 µm window. The development of asymmetric directional couplers enabled the construction of a beam combiner that includes a 50:50 coupler for interferometric combination and two ∼75 : 25 couplers for photometric calibration. The visibility of the bare beam combiner was measured at 87% and then at 82% after fiber-connectorization by optimizing the input polarization. These results indicate that ULI technique can fabricate efficient fiber-connectorized K-band beam combiners for astronomical purposes.

Original language	English
Pages (from-to)	159-166
Number of pages	8
Journal	Applied Optics
Volume	63
Issue number	1
Early online date	21 Dec 2023
DOIs	https://doi.org/10.1364/AO.510293
Publication status	Published - 1 Jan 2024

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

Access to Document

10.1364/AO.510293Licence: CC BY

Download pdf
© 2024 Optica Publishing Group.
Final published version, 13.9 MBLicence: CC BY

Cite this

Siliprandi, J., MacLachlan, D. G., Ross, C. A., Sharma, T. K., Labadie, L., Madhav, K., Nayak, A. S., Dinkelaker, A. N., Roth, M. M., Scott, N. J., du Foresto, V. C., Thomson, R. R., & Benoit, A. (2024). Fiber-connectorized ultrafast-laser-inscribed K-band integrated optics beam combiner for the CHARA telescope array. Applied Optics, 63(1), 159-166. https://doi.org/10.1364/AO.510293

@article{b89ee9ba013847ec959157b2715e2b8f,

title = "Fiber-connectorized ultrafast-laser-inscribed K-band integrated optics beam combiner for the CHARA telescope array",

abstract = "A fiber-connectorized K-band integrated-optics two-telescope beam combiner was developed for long-baseline interferometry at the CHARA telescope array utilizing the ultrafast laser inscription (ULI) technique. Single-mode waveguide insertion losses were measured to be ∼1.1 dB over the 2–2.3 µm window. The development of asymmetric directional couplers enabled the construction of a beam combiner that includes a 50:50 coupler for interferometric combination and two ∼75 : 25 couplers for photometric calibration. The visibility of the bare beam combiner was measured at 87\% and then at 82\% after fiber-connectorization by optimizing the input polarization. These results indicate that ULI technique can fabricate efficient fiber-connectorized K-band beam combiners for astronomical purposes.",

author = "Jacopo Siliprandi and MacLachlan, \{David G.\} and Ross, \{Calum A.\} and Sharma, \{Tarun K.\} and Lucas Labadie and Kalaga Madhav and Nayak, \{Abani S.\} and Dinkelaker, \{Aline N.\} and Roth, \{Martin M.\} and Scott, \{Nicholas J.\} and \{du Foresto\}, \{Vincent Coud{\'e}\} and Thomson, \{Robert R.\} and Aur{\'e}lien Benoit",

note = "Publisher Copyright: {\textcopyright} 2024 Optica Publishing Group.",

year = "2024",

month = jan,

day = "1",

doi = "10.1364/AO.510293",

language = "English",

volume = "63",

pages = "159--166",

journal = "Applied Optics",

issn = "1559-128X",

publisher = "Optica Publishing Group",

number = "1",

}

TY - JOUR

T1 - Fiber-connectorized ultrafast-laser-inscribed K-band integrated optics beam combiner for the CHARA telescope array

AU - Siliprandi, Jacopo

AU - MacLachlan, David G.

AU - Ross, Calum A.

AU - Sharma, Tarun K.

AU - Labadie, Lucas

AU - Madhav, Kalaga

AU - Nayak, Abani S.

AU - Dinkelaker, Aline N.

AU - Roth, Martin M.

AU - Scott, Nicholas J.

AU - du Foresto, Vincent Coudé

AU - Thomson, Robert R.

AU - Benoit, Aurélien

PY - 2024/1/1

Y1 - 2024/1/1

N2 - A fiber-connectorized K-band integrated-optics two-telescope beam combiner was developed for long-baseline interferometry at the CHARA telescope array utilizing the ultrafast laser inscription (ULI) technique. Single-mode waveguide insertion losses were measured to be ∼1.1 dB over the 2–2.3 µm window. The development of asymmetric directional couplers enabled the construction of a beam combiner that includes a 50:50 coupler for interferometric combination and two ∼75 : 25 couplers for photometric calibration. The visibility of the bare beam combiner was measured at 87% and then at 82% after fiber-connectorization by optimizing the input polarization. These results indicate that ULI technique can fabricate efficient fiber-connectorized K-band beam combiners for astronomical purposes.

AB - A fiber-connectorized K-band integrated-optics two-telescope beam combiner was developed for long-baseline interferometry at the CHARA telescope array utilizing the ultrafast laser inscription (ULI) technique. Single-mode waveguide insertion losses were measured to be ∼1.1 dB over the 2–2.3 µm window. The development of asymmetric directional couplers enabled the construction of a beam combiner that includes a 50:50 coupler for interferometric combination and two ∼75 : 25 couplers for photometric calibration. The visibility of the bare beam combiner was measured at 87% and then at 82% after fiber-connectorization by optimizing the input polarization. These results indicate that ULI technique can fabricate efficient fiber-connectorized K-band beam combiners for astronomical purposes.

UR - https://www.scopus.com/pages/publications/85181154170

U2 - 10.1364/AO.510293

DO - 10.1364/AO.510293

M3 - Article

C2 - 38175017

AN - SCOPUS:85181154170

SN - 1559-128X

VL - 63

SP - 159

EP - 166

JO - Applied Optics

JF - Applied Optics

IS - 1

ER -

Fiber-connectorized ultrafast-laser-inscribed K-band integrated optics beam combiner for the CHARA telescope array

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this