Highly stable physical-contact optical fiber connectors with spherical convex ends

Shintaku, Toshihiro; Sugita, E.; Nagase, Ryo

doi:10.1109/50.212533

Cited by 36 publications

(8 citation statements)

References 5 publications

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“…A little bit of pure water is sprayed on the lapping films as lapping liquid in each stage. In order to make sure that the spherical radius of the ferrule meets the criteria [14], the nominal lapping pressure P applied to one connector is 0.48 MPa. The optical liber connectors are cleaned for 5 min using ultrasonic wave and absolute alcohol after each lapping process stage.…”

Section: Methodsmentioning

confidence: 99%

On the Lapping Mechanism of Optical Fiber End-Surfaces Using Fixed Diamond Abrasive Films

Duan

Liu

2011

Journal of Manufacturing Science and Engineering

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The purpose of this paper is to reveal material removal mechanisms of optical fiber end-surface in lapping processes. The lapping process experiments are conducted using fixed diamond abrasive lapping films with various particle sizes of 6 μm, 3 μm, 1 μm, and 0.5 μm. The micrographs of the optical fiber end-surfaces are observed using a scanning electron microscope. The experimental results show that there exist three material removal modes in the lapping processes: brittle fracture mode, semibrittle and semiductile mode, and ductile mode. These modes are mainly controlled by abrasive particle size, and there appears a brittle-ductile transition’s critical point when lapping films with a particle size of 3 μm are used to lap optical fiber end-surfaces. An interpretation is proposed for the formation mechanism of the plastic deformed layer on the optical fiber end-surfaces.

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Section: Methodsmentioning

confidence: 99%

On the Lapping Mechanism of Optical Fiber End-Surfaces Using Fixed Diamond Abrasive Films

Duan

Liu

2011

Journal of Manufacturing Science and Engineering

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“…5͑a͒, the contact surface will have convex ends with a 5-to 25-mm radius. 5,8,9 This can reduce the connection air gap due to surface roughness, dust, or small particles. Also, an elliptical contact region will be produced between the two guide pins after the spring force has been applied.…”

Section: Solid Model Constructionsmentioning

confidence: 98%

“…Although the precision can be controlled, misalignment may still occur owing to the contact stress on the connecting interface. 4,5 In addition, contact surface modifications as a result of optical considerations [6][7][8][9][10][11][12][13] will significantly affect the stress and strain after load is applied.…”

Section: Introductionmentioning

confidence: 99%

Optimum design for the contact surface of multifiber optical connectors

Lin¹

2007

Opt. Eng

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The core diameter of a single-mode fiber is about 8 to 10m. Any slight misalignment or deformation of the optical mechanism will cause significant optical losses at connections. Previous studies have concentrated on improving the manufacturing process to obtain highprecision components. Although the precision can be controlled, misalignment may still occur owing to the contact stress on the connecting interface. This study used the finite-element method to simulate the contact status, and used MT-series connectors as examples. The connectors use a guide-pin structure to align the two contact surfaces, and use a spring or clip to maintain tight contact. Because the MT ferrules are made of plastic materials, they are softer than ceramic ones and the deformation strains are more significant. For the finite-element analysis, a solid model of the MT ferrule with a convex end, oblique angle, and fiber protrusion can be constructed according to the JIS C5981 standard. Results of a simulation, integrating the optimization technique and AN-SYS software, showed that the fiber center displacement for the commonly used oblique PC connectors would be 0.9 m. This will significantly affect the eccentricity tolerances for single-mode applications, because a maximum of 1.5 m is acceptable. Using the resulting new standard ͑eccentricity Ͻ0.6 m͒ to select ferrules, and making them into connectors, it is found that the insertion losses in 98% of connectors are less than 0.3 dB. This result satisfies the requirement for single-mode applications.

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“…1. The optimized ferrule end dimensions for realizing a stable PC connection have already been reported [5]. The optimized dimensions after polishing the ferrule ends are a spherical radius of 10 to 25 mm, a fiber withdrawal of less than 0.05 µm and a convex vertex eccentricity from the ferrule center of less than 50 µm.…”

Section: Structure and Ferrule Parameters For Realizing Pc Connectionmentioning

confidence: 99%

10-year reliability test results for SC connector installed on outside plant

Abe

Yanagi

Asakawa

et al. 2009

IEICE Electron. Express

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Optical connectors are used both indoors and outdoors. To confirm the durability of optical connectors employing PC connection in actual outdoor environments, since 1997 we have been performing a reliability test on an SC connector installed in a high temperature and high humidity location. We confirmed that SC connectors with optimized ferrule end dimensions, which are designed to provide physical contact connection with long-term reliability, have maintained good levels of optical performance in an actual outdoor environment for 10 years.

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Highly stable physical-contact optical fiber connectors with spherical convex ends

Cited by 36 publications

References 5 publications

On the Lapping Mechanism of Optical Fiber End-Surfaces Using Fixed Diamond Abrasive Films

On the Lapping Mechanism of Optical Fiber End-Surfaces Using Fixed Diamond Abrasive Films

Optimum design for the contact surface of multifiber optical connectors

10-year reliability test results for SC connector installed on outside plant

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