10G CWDM Conversion Technology

Transcription

1 10G CWDM Conversion Technology Simplifying Today s Challenges By Transition Networks Curt Carlson Product Manager curtc@transition.com com

2 Agenda WDM Technology Overview What are the features/benefits for 10G CWDM Real-World Use Case/Examples CWDM vs. DWDM Summary

3 WDM Technology Overview

4 WDM Defined Wavelength Division Multiplexing a technology which multiplexes multiple optical carrier signals on a single optical fiber by using different wavelengths (colors) of light to carry each individual signal

5 Traditionally Why WDM Technology Each fiber connection requires two strands of fiber one for TX and one for RX Fully Consumed What do you do when all of your installed fiber is used up and you need to add more links? Install more fiber? Lease more fiber? Deploy WDM Technology Fiber Exhaustion Is the primary driver for the use of WDM technology

6 WDM Analogy Highway analogy for WDM: If we increase the number of lanes on a highway, we can increase the volume of traffic. Each lane has the same capacity and speed limit as before, but our capacity is increased by the factor equal to the number of lanes Alternatives to increase capacity Building a new highway = installing more fiber Increasing the speed limit = upgrading from FE to Gigabit

7 WDM Principle Multiplexing/Demultiplexing λ 1 λ 1 λ 2 λ 2 2 λ 3 Mult tiplexer λ 1, λ 2, λ 3, λ 4 λ λ 4 λ 4 ltiplexer Demu λ 3

8 Support for WDM A wide variety of communication environments support WDM technology Fast Ethernet - OC-3/FDDI/ATM 10/100 - RS232 Gigabit Ethernet - RS422/485 10/100/ High Speed Serial Ethernet NIDs - NICs T1/E1 - SFPs DS3/E3 - Industrial Ethernet

9 WDM Types 3 Types WDM Technology Type Channels Channel spacing Remarks WWDM nm or - Typically 1310nm and 1550nm more - Inexpensive - Can be done by transceiver CWDM nm - Higher channel counts than WWDM - Lower cost than DWDM - Passive optical components Mux/DeMux DWDM or Max 16 ch. for passive OC nm - Active solutions add management and other features

10 WWDM Transceiver Wideband WDM can sometimes be referred to as WWDM Typically 2 wavelengths 1310nm and 1490/1550nm Analogy: Two lane country road one lane in each direction Bi-directionally, over one strand of fiber Offers potential to double the fiber capacity of existing network Available in SFP modules and in fixed optics WDM WDM

11 WWDM Common Application Moving from duplex fiber to simplex fiber Doubling current fiber plant Media Conversion Fiber ports use a simplex optic Single fiber, single strand, or simplex fiber Photo below show single SC connector Inexpensive option to start taking advantage of WDM technology

12 CWDM Multiplexer/Demultiplexer Type Channels Channel spacing Remarks WWDM nm - Typically 1310nm and 1550nm or more - Inexpensive - Can be done by transceiver CWDM nm - Higher channel counts than WWDM - Lower cost than DWDM - Passive optical components Mux/DeMux DWDM or Max 16 ch. for passive OC nm - Active solutions add management and other features

13 CWDM Multiplexer/Demultiplexer Coarse WDM Typically 4, 8, or 16 wavelengths encompassing 1310nm to 1610nm Analogy: Multi-lane divided highway Typically used uni-directionally Single Strand for Transmit and a single strand for receive WDM WDM WDM WDM Or as an optical add/drop mux (OADM) WDM WDM WDM

14 CWDM Multiplexer/Demultiplexer Typical 1550nm window wavelengths = 1470nm to 1610nm in 20nm increments Typical 1310nm window wavelengths = 1270nm to 1410nm in 20nm increments

15 DWDM Multiplexer/Demultiplexer Type Channels Channel Remarks spacing WDM nm or more - Typically 1310nm and 1550nm - Inexpensive - Can be done by transceiver CWDM nm - Higher channel counts than WWDM - Lower cost than DWDM DWDM or 1.6 nm - Passive optical components Mu/DeMux - Max 16 ch. for passive OC - Active solutions add management and other features

16 DWDM Multiplexer/Demultiplexer Dense WDM Typically 8 or more wavelengths centered around 1550nm Typically used uni-directionally or as an optical add/drop mux (OADM) Adds a Reprogrammable Optical Add/Drop (ROADM) Channel spacing typically y 0.8nm (100GHz) or 1.6nm (200GHz) 160 channels possible on active systems (max. 40 channels passive) using 0.2nm (25GHz) channel spacing Active systems very expensive

17 DWDM Multiplexer/Demultiplexer

18 Features/Benefits for 10G CWDM

19 10G CWDM There are many influences for the growth of 10G and it s expansion into the Enterprise, Industrial Environments, and Service Provider Networks 1. 10G hardware has become more economical 2. Business Ethernet and Ethernet Mobile Backhaul has evolved with a need for higher capacity 3. CWDM Multiplexers are passive and agnostic of protocol or speed 4. Increased bandwidth requirements for Cloud Networking 5. Increased device connections over fiber pairs

20 CWDM & DWDM Mux Technology From Line RX port To 1510nm RX port To 1530nm RX port To 1550nm RX port To 1570nm RX port Completely passive WDM devices use thin film filters to Mux and Demux the wavelengths Requires no external power supplies Compatible with all single mode fiber Compatible with all WDM wavelength based electronics Transparent to speed, support everything from 100M to 100G

21 CWDM Technology 20nm spacing 1470nm 1490nm 1510nm 1530nm 1550nm 1570nm 1590nm 1610nm CWDM MUX 10G Connections 10G Connections 10G Connections 1470nm 1610nm Any Protocol Any Protocol Any Protocol

22 Wavelength Converting Multiple protocols can be transmitted over a single duplex fiber link by combining fiber outputs of several converters with passive CWDM mux/demux SONET, ATM, Fast Ethernet, Gigabit Ethernet, T1/E1, DS3/E3, etc

23 Wavelength Converting Transponders Referred to as Transponders Performs fiber to fiber (wavelength to wavelength) conversion Provides means for a general wave length (white light) to be converted to a CWDM specific wave length Based on the SFP modules used Manufacturers design product based on supported data rate 100M to 1Gig 1G to 10G Sometimes protocol independent Be aware, some devices may only reamplfy the signal Others reamplfy, reshape and retime (3R s) Transponders are also used when switches do not support higher power requirement of CWDM SFP modules

24 CWDM Technology OADM Optical Add/Drop Multiplexer All the light paths that directly pass an OADM are termed cut-through through light paths, while those that are added or dropped at the OADM node are termed added/dropped light paths OADM

25 CWDM Technology OADM 1570 Drop 1590 Drop

26 Real lworld Examples

27 Point-to-Point CWDM Common Topologies 8Ch Channel 8Ch Channel CWDM Box CWDM Box Mux Demux Demux Mux Alleviate fiber congestion: Reducing backbone fiber used by a factor of 4, 8 or 16 Increasing capacity on each backbone fiber by a factor of 4, 8 or 16

28 CWDM Common Topologies Ring Building A Mux Demux Mux Demux Mux Demux Demux Mux 8 Channel CWDM Boxes (2) at each location Mux Demux Demux Mux Demux Mux Demux Mux Building B Building D Building C

29 CWDM Media Converter Application

30 Service Provider Application

31 Single Strand CWDM Application

32 Enterprise Application Hub to Campus

33 CWDM vs. DWDM

34 CWDM versus DWDM Parameter CWDM DWDM Inter channel spacing 20nm As low as 0.2nm Number of channels Up to 16 More than 160 Communication Range 40-80km - 200km Optics Fixed Laser Tunable Laser Cost Lower Higher Market Metro, Access, Large enterprise Long Haul

35 CWDM versus DWDM

36 Summary

37 xwdm Summary Increase fiber capacity without pulling more fiber Multiple protocols all running on same fiber pair Passive Layer 1 Solution. Customer s traffic remains untouched xwdm optics available as fixed or pluggable (SFP, XFP, etc.) Convert existing wideband optics to narrowband xwdm colors with use of optical line converters or transponders Solution can be used either Point to Point or as an Add/Drop Multiplexer (OADM) CWDM 10G offers many benefits to service providers that need to better utilize the existing fiber infrastructure.

38 Thank You