FOCCoS for Subaru PFS
Antonio Cesar de Oliveira (1), Ligia Souza de Oliveira (1), Marcio, Vital de Arruda (1), Jesulino Bispo dos Santos (1), Lucas Souza Marrara (1),, Vanessa Bawden de Paula Macanhan (1), Joao Batista de Carvalho Oliveira (1),, Rodrigo de Paiva Vilacca (1)

TL;DR
This paper describes the design, fabrication, and testing of the FOCCoS optical fiber system for Subaru PFS, focusing on fiber stress, connector stability, and overall system efficiency.
Contribution
It introduces a detailed design and testing methodology for the FOCCoS fiber system, including stress testing and connector performance evaluation.
Findings
Encouraging results for the Polymicro FBP120170190 fiber performance.
Stable throughput after multiple connection cycles.
Effective stress testing methods for fiber durability.
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…
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