FOCCoS for Subaru PFS

Antonio Cesar de Oliveira; Ligia Souza de Oliveira; Marcio V. de Arruda; Jesulino Bispo dos Santos; Lucas Souza Marrara; Vanessa Bawden de Paula Macanhan; João Batista de Carvalho Oliveira Sr.; Rodrigo de Paiva Vilaça; Tania Pereira Dominici; Laerte Sodré Jr.; Claudia Mendes de Oliveira; Hiroshi Karoji; Hajime Sugai; Atsushi Shimono; Naoyuki Tamura; Naruhisa Takato; Akitoshi Ueda

doi:10.1117/12.925745

24 September 2012 FOCCoS for Subaru PFS

Antonio Cesar de Oliveira, Ligia Souza de Oliveira, Marcio V. de Arruda, Jesulino Bispo dos Santos, Lucas Souza Marrara, Vanessa Bawden de Paula Macanhan, João Batista de Carvalho Oliveira Sr., Rodrigo de Paiva Vilaça, Tania Pereira Dominici, Laerte Sodré Jr., Claudia Mendes de Oliveira, Hiroshi Karoji, Hajime Sugai, Atsushi Shimono, Naoyuki Tamura, Naruhisa Takato, Akitoshi Ueda

Author Affiliations +

Proceedings Volume 8446, Ground-based and Airborne Instrumentation for Astronomy IV; 84464R (2012) https://doi.org/10.1117/12.925745
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The Fiber Optical Cable and Connector System (FOCCoS), provides optical connection between 2400 positioners and a set of spectrographs by an optical fibers cable as part of Subaru PFS instrument. Each positioner retains one fiber entrance attached at a microlens, which is responsible for the F-ratio transformation into a larger one so that difficulties of spectrograph design are eased. The optical fibers cable will be segmented in 3 parts at long of the way, cable A, cable B and cable C, connected by a set of multi-fibers connectors. Cable B will be permanently attached at the Subaru telescope. The first set of multi-fibers connectors will connect the cable A to the cable C from the spectrograph system at the Nasmith platform. The cable A, is an extension of a pseudo-slit device obtained with the linear disposition of the extremities of the optical fibers and fixed by epoxy at a base of composite substrate. The second set of multi-fibers connectors will connect the other extremity of cable A to the cable B, which is part of the positioner's device structure. The optical fiber under study for this project is the Polymicro FBP120170190, which has shown very encouraging results. The kind of test involves FRD measurements caused by stress induced by rotation and twist of the fiber extremity, similar conditions to those produced by positioners of the PFS instrument. The multi-fibers connector under study is produced by USCONEC Company and may connect 32 optical fibers. The tests involve throughput of light and stability after many connections and disconnections. This paper will review the general design of the FOCCoS subsystem, methods used to fabricate the devices involved and the tests results necessary to evaluate the total efficiency of the set.

Citation Download Citation

Antonio Cesar de Oliveira, Ligia Souza de Oliveira, Marcio V. de Arruda, Jesulino Bispo dos Santos, Lucas Souza Marrara, Vanessa Bawden de Paula Macanhan, João Batista de Carvalho Oliveira Sr., Rodrigo de Paiva Vilaça, Tania Pereira Dominici, Laerte Sodré Jr., Claudia Mendes de Oliveira, Hiroshi Karoji, Hajime Sugai, Atsushi Shimono, Naoyuki Tamura, Naruhisa Takato, and Akitoshi Ueda "FOCCoS for Subaru PFS", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84464R (24 September 2012); https://doi.org/10.1117/12.925745

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available