105 heat resistant Plastic Optical Fiber Cable optimized for the MOST system

Transcription

1 105 heat resistant Plastic Optical Fiber Cable optimized for the MOST system MOST Interconnectivity Conference 5 th Nov. Marriott hotel Kazuki NAKAMURA Yoshihiro TSUKAMOTO Mitsubishi Rayon Co, Ltd. Optical fiber Dept.

2 Outline About Mitsubishi Rayon Motivation for the development Target requirements Performance data Summary

3 Mitsubishi Rayon as POF supplier Dupont Mitsubishi Rayon: ESKA Asahi Chemical Electronics Toray Hächst Mitsubishi Rayon has more than 30 years, longest history supplying Plastic Optical fibers highest share of the global Plastic Optical Fiber market with wide range of applications highest market share of the automotive network market of the MOST systems

4 Variety of Applications Optical Switch Digital audio/home networking Lighting & Illumination Automotive networking Host computer NC PC Factory level Cell level PC PLC DCS Field level Photo-electric switch Industrial lighting for machine vision Field-Bus, Machine Control

5 Cost down potential of technology Temperature stability >> 85 C Motivation for the development Media comparison among POF, PCS, UTP and STP Active components (FOT, Magnetics) for >> 85 Bandwidth Bending radius, ease of installation Power budget/signal Quality/EMC@Bandwidth Diagnosis, Fault detection, Repair Over all sum Cable Type Fiber Copper Characteristics POF PCS UTP STP Scalability, Usability-over-cost in other automotive applications Source; MOST Interconnectivity conference, Experience and Future scenarios by BMW AG POF for automotive, temperature limitation is, and has been always thought to be a concern Mitsubishi Rayon continue to challenge for improvement of temperature limit above 85 C to cast aside such concerns, with success for non-automotive applications and soon automotive For this specific case, the technology fits the optimized cable system for the MOST requirement

6 Design of Plastic Optical fiber Core: PMMA (refractive index = 1.492) Cladding: Fluorinated polymer (Lower index = ~1.402) Light propagation 1.0 mm Refractive index

7 Design concepts and requirements Design changes Fiber Replacing cladding to high Tg, where present cladding can not survive over 85 C in long term (multiple thousands hours) Stay with same PMMA core (Tg: ~110 C) which should be good enough for 105 C Jacketing Selected new outer sheath instead of soft Poly Amide (PA), that also influences long term stability beyond 85 C For inner sheath, stay with PA12 to maintain weld-ability with plastic ferrule made from PA12 Key parameters Aging stability of cable attenuation Thermal shrinkage and pistoning Material dependent chemical & mechanical characteristics

8 Requirements Based on present 85 requirement Test Guidelines for fiber Optic Cable / Prufrichtlinie fur LWL-Meterware Optical loss:105 <200dB/km Stripping force (Inner-jacket from fiber): >50N /24hrs: <±30μm Thermal /24hrs: <0.6% Bending loss: the smaller the better Material: Bending stiffness (influence handling harness fabrication) Non-flammability, modified DIN Hydrolysis 1.51mm 1.00mm Inner Sheath: un-strippable from fiber 2.30mm Fiber with new cladding Outer Sheath: strippable from inner sheath

9 Summary Test Results 105 Aging Stripping force Core to Inner to Inner Outer Pistoning Core to Inner to Inner Outer Shrinkage Nonflammability Bending Stiffness PASS (3000h) PASS PASS PASS PASS PASS PASS PASS Aging test ongoing up to 5,000hrs!

10 Loss spectrum Attenuation [db/m] Exisiting cable 85C-1 85C-2 85C-3 85C-4 85C-5 Requirement Attenuation [db/m] resistant cable 105C-1 105C-2 105C-3 105C-4 105C-5 Requirement Wave length [nm] Wave length [nm] Similar to existing product, attributed to common core material

11 105 aging 1000 Attenuation Existing product 105 resistant cable Aging Time [hrs] Loss at 650nm maintain low level up to 3000hrs The test is ongoing up to 5000hrs

12 Pistoning of fiber from inner-sheath Pistonning [μm] resistant cable Tested at 105 Present product Tested at Aging Time [hrs] Conform the requirement at 105

13 Shrinkage [%] Thermal shrinkage of cable 105 resistant cable Tested at 105 Requirement Present 85 cable Tested at Aging Time [hrs] Conform the requirement even at 105

14 Induced loss(db) Static bending Present product 105 resistant cable Required upper limit Bending Radius(mm) Bending loss is even lower than present product

15 30 Bending stiffness 25 Stress (N) Present product 105 resistant cable Displacement (mm) Similar to present product

16 Extinguish time[sec] Non-flammability Test procedure: PN 5.1 Test Guidelines for fiber Optic Cable, According to DIN Extinguish time until the flame goes out Present product Stable non-flammability sample number = resistant cable

17 Hydrolysis No change observed in appearance after 85 95%RH. 720hrs treatment

18 Bandwidth 140 Present product Bandwidth (MHz*20m) MOST Requirement > 50MHz 105 C cable Sample Number Negligible difference of bandwidth caused by replacement of cladding

19 Summary Sample 105 Aging Stripping force Fiber/Inner Pistoning Fiber/inner Shrinkage Flame Retardance Bending Stiffness 105 resistant 170dB/km at 3000h 54N 9μm 0.57% PASS (10/10) 17N Requirement 5000hrs >50N 48hrs 48hr s <30sec. 10 to 18N Supposed critical parameters are conformed by newly designed POF cable Target release date: middle of 2009

20 Thank you for your attention!