Optical Communications Technology and Modulation Formats 16 ...

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High level market requirements• Must retrofit into existing DWDM infrastructure• Support 50GHz channel spacing• Support up to 24 cascaded ROADMs @100GHz spacing• Support up to >10 cascaded ROADMs @50GHz spacing• Reach up to 1,500km• No change to existing line equipment (e.g. no extra amplificationrequired, use current in-line DCMs)• Same CD/PMD tolerance as current 10G (with integration of TDC/PMDC if need be)• Operate without in-line DCM • Power/footprint same as current 40G• Price 2x current 40G• First HW samples March ‘1010/<strong>16</strong>/08Client LogoCONFIDENTIAL © 2008 STRATALIGHT COMMUNICATIONS ALL RIGHTS RESERVED. 42
Transmitted Spectra – PotentialsROADM50GHz ProfileNRZ10GbpsA narrow spectrum (i.e longer pulses) improves tolerance to CD, PMD, <strong>and</strong> ROADM tolerance.DQPSK40GbpsDP-QPSK40GbpsCONFIDENTIAL © 2007 STRATALIGHT COMMUNICATIONS ALL RIGHTS RESERVED. 43
Page 8 and 9: Optical Impairments• Polarization
Page 10 and 11: From 10 Gbps to 40Gbps• Optics•
Page 12 and 13: Modulation SchemesStrataLight propr
Page 14 and 15: Modulation SchemesModulation Attrib
Page 16 and 17: Carrier Suppressed Return to Zero (
Page 18 and 19: Differential Phase Shift Keying (DP
Page 20 and 21: Transmitted SpectraROADM50GHz Profi
Page 22 and 23: Differential Quaternary Phase Shift
Page 24 and 25: Transmitted SpectraROADM50GHz Profi
Page 26 and 27: Transmitter Block DiagramsPSBTI inN
Page 28 and 29: DWDM Filter CompatibilityStrataLigh
Page 34 and 35: Performance at 40GbpsStrataLight pr
Page 36 and 37: DPSK WDM Penalty• 50G grid: at th
Page 38 and 39: Conclusions and Summary• Metro Ap
Page 40 and 41: Technical LeadershipStrataLight pro
Page 44 and 45: Development solution - PM-QPSKTx Bl

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