THE NEW OPTICAL FIBRE CATEGORIES What do they promise?

Transcription

1 THE NEW OPTICAL FIBRE CATEGORIES What do they promise? prepared and delivered by ϕ Breakfast Seminar 13th March 2001

2 Fibreoptic Industry Association PO Box MT65 LEEDS LS17 8YD UK Tel: +44 (0) Fax: +44 (0) Training Design and specification / IT cost management Project management Audits and arbitration 2001

3 Mike Gilmore Fibreoptic Industry Association Senior Partner, PO Box MT65 LEEDS LS17 8YD UK Tel: +44 (0) Fax: +44 (0) Training Design and specification / IT cost management Project management Audits and arbitration Standards UK Fibreoptic Industry Association, Technical Director BSI, Chairman, TCT7/-/1: IT PD1001: EMC and Structured BS 7718: CoP Installation of Fibre Optic Europe CENELEC, Convenor, TC215 WG1: IT EN : ISDN Basic Access EN : ISDN Primary Rate EN 50173: Generic - Design EN : Installation: Specification & Quality Assurance EN 50346: Testing of Installed 2001

4 Mike Gilmore Fibreoptic Industry Association Senior Partner, PO Box MT65 LEEDS LS17 8YD UK Tel: +44 (0) Fax: +44 (0) Training Design and specification / IT cost management Project management Audits and arbitration Standards International ISO/IEC, Member, JTC1 SC25 WG3: Generic ISO/IEC 11801: Generic - Design ISO/IEC : Administration ISO/IEC TR : Planning and Installation ISO/IEC TR : Testing Optical and via IEC SC46A WG2 IEC : Testing Copper ISO/IEC, Editor, JTC1 SC25 PT SOHO ISO/IEC 15018: SOHO - Design 2001

5 Agenda Fibreoptic Industry Association Session One What are the new OF Categories? Why do we need them? What do they promise? When can we have them? Session Two 10Gbit Ethernet the grand plan LAN ASG Future publications End Break 2001

6 Agenda Fibreoptic Industry Association Session One What are the new OF Categories? Why do we need them? What do they promise? When can we have them? Session Two 10Gbit Ethernet the grand plan LAN ASG Future publications End Break 2001

7 MMF Specification - I Fibreoptic Industry Association Optical fibre geometry (standardized) 50/ /125 Core diameter (µm) 50 ± ± 3 Cladding diameter (µm) 125 ± ± 3 NA 0.20 ± ± Attenuation (db) 850nm 1300nm Optical fibre performance parameters (options) Attenuation coefficient dbkm -1 max. 850nm 1300nm?? Modal bandwidth MHz.km min. 850nm 1300nm?? Modal Bandwidth (MHz) Channel length (m) Channel length (m) 2001

8 MMF Specification - II Fibreoptic Industry Association Optical fibre geometry (standardized) 50/ /125 Core diameter (µm) 50 ± ± 3 Cladding diameter (µm) 125 ± ± 3 NA 0.20 ± ± Attenuation (db) 850nm 1300nm Optical fibre performance parameters (options) Attenuation coefficient dbkm -1 max. 850nm 1300nm?? Modal bandwidth MHz.km min. 850nm 1300nm?? Overfilled launch LED-like Modal bandwidth MHz.km min. 850nm 1300nm?? Restricted launch LASER-like Modal Bandwidth (MHz) Channel length (m) RML OFL Channel length (m) 2001

9 MMF Performance Options 95 Fibreoptic Industry Association Attenuation coefficient dbkm -1 max. Modal bandwidth MHz.km min. 850nm 1300nm 850nm 1300nm 50/125 and 62.5/ / ISO/IEC and EN (1995) ANSI/TIA/EIA 568A (1995) 50/ /125 Attenuation coefficient dbkm -1 max. 850nm 1300nm / nm Modal bandwidth MHz.km min. 1300nm 850nm nm /125 and 62.5/ /

10 MMF Categories Fibreoptic Industry Association Wavelength 50/125 or 62.5/125 Multimode OF OM1 OM2 OM3 Attenuation coefficient (dbkm -1 max) 850 nm 3, nm 1,5 Modal bandwidth OFL (MHz.km min) 850 nm nm Modal bandwidth RML (MHz.km min) 850 nm ffs ffs 1300 nm ffs ffs Propagation delay (ns.m -1 max) 850 nm 1300 nm ffs In reality OM1 is 62.5, OM2 and OM3 are 50/

11 Agenda Fibreoptic Industry Association Session One What are the new OF Categories? Why do we need them? What do they promise? When can we have them? Session Two 10Gbit Ethernet the grand plan LAN ASG Future publications End Break 2001

12 Optical Fibre Construction Fibreoptic Industry Association Core Cladding Core and cladding have different optical properties Refractive index (R.I.) n x = c/v x c = speed of light in a vacuum v x = speed of light in material x Light is transmitted in the core when n core > n cladding 2001

13 Total Internal Reflection Fibreoptic Industry Association light lost from cladding R.I. = n 2 < n 1 R.I. = n 1 light travelling at critical angle θ c sin (θ c ) = n 2 / n 1 highest order mode zero order mode 2001

14 Acceptance Angle: N.A. Fibreoptic Industry Association light lost from cladding R.I. = n 2 < n 1 R.I. = n 1 α θ c sin (θ c ) = n 2 / n 1 sin (α) = {n n 2 2 } 0.5 = NA (numerical aperture) Light injected into optical fibre = coupled power = f (core diameter 2 ) = f (NA 2 ) 2001

15 MMF: Multimode Optical Fibre Fibreoptic Industry Association n 2 n 1 θ c STEP(PED) INDEX (S.I.) MMF path lengths: maximum variation path times: maximum variation bandwidth: modal dispersion n 2 n 1 (r) GRADED INDEX (G.I.) MMF path lengths: significant variation path times: limited variation bandwidth: 1st order: modal dispersion 2nd order: chromatic dispersion Geometry options d/d NA 50/ /

16 SMF: Singlemode Optical Fibre Fibreoptic Industry Association 1300nm n 2 n NA = NA = Core diameter (microns) NA = 0.20 STEP(PED) INDEX (S.I.) SMF path lengths: no variation path times: no variation bandwidth: 1st order: chromatic dispersion 2nd order: pulse shape dispersion Geometry d/d NA 8-10/

17 Injection Devices Fibreoptic Industry Association VISIBLE LIGHT Blue Red INFRA-RED - OPTICAL FIBRE 1st Window 2nd Window 3rd Window Bit rate Wavelength (nm) Cost very high <40000Mb/s Singlemode LASER high <2000Mb/s medium <500Mb/s Multimode LASER standard VCSEL CD Multimode LASER Multimode LED low <100Mb/s Multimode LED 2001

18 MMF Bandwidth: LASER-LED Fibreoptic Industry Association LED n 2 n 1 (r) LASER n 2 n 1 (r) LASER devices should be able to offer higher data rates over a given MMF - theoretically 2001

19 Agenda Fibreoptic Industry Association Session One What are the new OF Categories? Why do we need them? What do they promise? When can we have them? Session Two 10Gbit Ethernet the grand plan LAN ASG Future publications End Break 2001

20 100Mb/s Implementation Fibreoptic Industry Association Implementation cost SMF: OS1 50/125: OM3 62.5/125: OM1 50/125: OM Channel length (m) 2001

21 1000Mb/s Implementation Fibreoptic Industry Association Implementation cost SMF: OS1 50/125: OM3 62.5/125: OM1 50/125: OM Channel length (m) 2001

22 10000Mb/s Implementation Fibreoptic Industry Association Implementation cost SMF: OS1 62.5/125: OM1 50/125: OM2 50/125: OM Channel length (m) 2001

23 Agenda Fibreoptic Industry Association Session One What are the new OF Categories? Why do we need them? What do they promise? When can we have them? Session Two 10Gbit Ethernet the grand plan LAN ASG Future publications End Break 2001

24 Milestones Fibreoptic Industry Association Establish test method references for inclusion in ISO/IEC (2002) and BS EN (2002) Develop consensus on overfilled launch (OFL) - restricted mode launch (RML) bandwidth requirements Notify various application groups with recommendation to consider the enhanced performance that may be possible 2001

25 Agenda Fibreoptic Industry Association Session One What are the new OF Categories? Why do we need them? What do they promise? When can we have them? Session Two 10Gbit Ethernet the grand plan LAN ASG Future publications End Break 2001

26 Agenda Fibreoptic Industry Association Session One What are the new OF Categories? Why do we need them? What do they promise? When can we have them? Session Two 10Gbit Ethernet the grand plan LAN ASG Future publications End Break 2001

27 10 Gigabit Ethernet Fibreoptic Industry Association switched operation only star topology support 10Gb/s Ethernet and Gb/s SONET 2000 m, m and m over SMF 100 m over existing MMF Legacy support Legacy support Range OF Wavelength Cable Protocol < 35 m MMF 850 OM1 < 69 m MMF 850 OM2 < 300 m MMF 850 OM3 < 300 m MMF 1300 OMx WWDM < m SMF 1310 < m SMF 1550 OS1 OS1 Serial Serial Serial Serial Serial SAN LAN M/WAN 2001

28 WWDM Fibreoptic Industry Association λ 1 λ 2 λ 3 λ 4 D/4 D/4 D/4 D/4 Data rate D = 4 x (D/4) λ 1 λ 2 λ 3 λ

29 Agenda Fibreoptic Industry Association Session One What are the new OF Categories? Why do we need them? What do they promise? When can we have them? Session Two 10Gbit Ethernet the grand plan LAN ASG Future publications End Break 2001

30 OF LAN Applications Fibreoptic Industry Association STANDARDIZED APPLICATIONS ISO/IEC : FOIRL ISO/IEC : 10BASE-FL/FB ISO/IEC : TR 4/16 Mb/s IEEE : Demand priority ATM-52 CD FDDI-LCF ISO/IEC FDDI ISO/IEC DIS FDDI ISO/IEC : 100BASE-FX TR 100 Mbit/s ATM-155 ATM-622 CD : Fibre Channel-133 CD : Fibre Channel-266 CD : Fibre Channel-531 CD : Fibre Channel-1062 IEEE 802-3: 1000BASE-SX IEEE 802-3: 1000BASE-LX APPLICATIONS IN DEVELOPMENT IEEE 802-3: 10000BASE-?? IEEE 802-3: 10000BASE-?? Mb/s / SIGNAL CLARITY Attenuation ATTENUATION DISPERSION APPLICATION FUNCTION Dispersion PROTOCOL FUNCTION Delay Copper: connection ~ 2 metres of cable length Optical fibre: connection ~ metres of cable length splice ~ metres of cable length Copper: dispersion irrelevant - noise critical Optical fibre: noise irrelevant dispersion irrelevant for low bit rate applications dispersion critical for high bit rate applications 2001

31 MMF Systems Fibreoptic Industry Association System operation requires that the signal is both large enough and clear enough to be interpreted at the receiver n 2 n 1 (r) Launched power - receiver sensitivity defines maximum allowed attenuation Maximum channel length defined by cable attenuation number of connections delay limits If available bandwidth is irrelevant If available bandwidth is relevant Attenuation (A) - Limited systems Bandwidth (B) - Limited systems 2001

32 SMF Systems Fibreoptic Industry Association System operation requires that the signal is both large enough and clear enough to be interpreted at the receiver n 2 n 1 Launched power - receiver sensitivity defines maximum allowed attenuation Maximum channel length defined by cable attenuation number of connections delay limits If total dispersion is irrelevant If total dispersion is relevant Attenuation (A) - Limited systems Dispersion (D) - Limited systems 2001

33 A-Limited System Design Rules Fibreoptic Industry Association APPLICATION FUNCTION SIGNAL CLARITY in window used PROTOCOL FUNCTION Attenuation Dispersion Delay Coupling Length Length Connectivity DESIGN RULES OLB max < OPB max OLB min > OPB min observe delay limits 2001

34 B-Limited System Design Rules Fibreoptic Industry Association APPLICATION FUNCTION SIGNAL CLARITY in window used PROTOCOL FUNCTION Attenuation Dispersion Delay Coupling Length Connectivity Modal bandwidth DESIGN RULES OLB max < OPB max OLB min > OPB min observe delay limits observe fibre specific length limits Length 2001

35 A-Limited MMF LAN standards Fibreoptic Industry Association Limit defined in LAN standard 850 nm 1300 nm ISO/IEC : FOIRL ISO/IEC : 10BASE-FL/FB ISO/IEC TR : 4 & 16 Mb/s Token Ring ISO/IEC : FDDI PMD ISO/IEC : 100BASE-FX IEEE : Demand priority 52 Mb/s 50/125 (OMx) Max. length (m) OPB max. (db) 62.5/125 (OMx) Max. length (m) OPB max. (db) Mb/s Calculated values using 1.5dB of connecting hardware losses 62.5/125 seems to offer advantages OPB (db)

36 B-limited LAN standards Fibreoptic Industry Association 850 nm 1300 nm IEEE 802.3: 1000BASE-LX: Gigabit Ethernet 1 Assuming no connecting hardware loss 50/125 (OM2) 500/500MHz.km Max. length (m) OPB max. (db) 62.5/125 (OM1) 200/500MHz.km Max. length (m) OPB max. (db) IEEE : Demand priority Mb/s CD 14165: 266 Mb/s CD 14165: 531 Mb/s 622 Mb/s IEEE 802.3: 1000BASE-SX: Gigabit Ethernet CD 14165: 1062 Mb/s CD 14165: 133 Mb/s CD 14165: 266 Mb/s 622 Mb/s > /125 seems to offer advantages OPB (db)

37 A-Limited SMF LAN standards Fibreoptic Industry Association Limits defined in LAN standard SMF (OS1) 1300 nm IEEE 802.3: 1000BASE-LX: Gigabit Ethernet Max. length (m) OPB max. (db)

38 Unallocated margin and OPB Fibreoptic Industry Association 850 nm 1300 nm 1310 nm SMF OFL Modal Bandwidth (MHz.km) Assumed OF attenuation (dbkm -1 ) A B C D B E=C-D-B 1000BASE-SX 830 nm 1000BASE-LX 1270 nm Max. channel length (m) Max. OF cable attenuation (db) Connecting hardware allowance (db) Max.length channel loss (db) Equipment OPB (db) Power penalty (db) Total channel loss (db) Unallocated margin (db) nm 2001

39 Agenda Fibreoptic Industry Association Session One What are the new OF Categories? Why do we need them? What do they promise? When can we have them? Session Two 10Gbit Ethernet the grand plan LAN ASG Future publications End Break 2001

40 Next steps Fibreoptic Industry Association 2000 SERIES DOCUMENT SET DESIGN OPERATION INSTALLATION SAFETY OPTICAL FIBRE CABLING: LAN APPLICATION SUPPORT GUIDE OPTICAL FIBRE CABLING: WAN APPLICATION SUPPORT GUIDE OPTICAL FIBRE CABLING: QUALITY ASSURANCE OPTICAL FIBRE CABLING: ADMINISTRATION OPTICAL FIBRE CABLING: INSTALLATION PRACTICE OPTICAL FIBRE CABLING: TESTING OPTICAL POWER: SAFETY LEVELS OPTICAL FIBRE: HANDLING OF PROCESSING CHEMICALS OPTICAL FIBRE: DISPOSAL OF WASTE MODELLING TOOLS CABLING STRUCTURES COST MODEL 2001

41 Campus Backbone Fibreoptic Industry Association Floor Distributor PP = Patch Panel SP = Splice Panel Splices as required Work Area PP PP PP/SP PP BD BD Optical Fibre Campus Backbone Campus Distributor BD CD BD BD Building Distributor CD CD 2001

42 Building Backbone Fibreoptic Industry Association Floor Distributor PP = Patch Panel SP = Splice Panel Work Area PP PP PP/SP PP/SP Optical Fibre Building Backbone FD FD FD Campus Distributor FD FD FD FD FD FD Building Distributor FD FD FD BD BD 2001

43 Horizontal Fibreoptic Industry Association Floor Distributor PP = Patch Panel SP = Splice Panel Work Area Optical Fibre Horizontal TO PP TO = Telecommunications Outlet CP = Consolidation Point PP/SP Building Distributor CP PP/SP 2001

44 New Structures - Active CP Fibreoptic Industry Association Floor Distributor PP = Patch Panel SP = Splice Panel TO = Telecommunications Outlet CP = Consolidation Point Work Area PP = Patch Panel SP = Splice Panel TO = Telecommunications Outlet TO Copper Horizontal Building Distributor Active CP Optical Fibre Horizontal PP/SP 2001

45 Agenda Fibreoptic Industry Association Session One What are the new OF Categories? Why do we need them? What do they promise? When can we have them? Session Two 10Gbit Ethernet the grand plan LAN ASG Future publications End Break 2001