Low-Power Solution for 10GE-PON

Transcription

1 Low-Power Solution for 10GE-PON Hiroki Ikeda, Hitachi Hiroki Yanagisawa, NEC Hiroshi Hamano, Fujitsu Labs. September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 1

2 Supporters Akio Tajima, Clark Li, David Li, Hideki Machida, Mitsunobu Kimura, Moonsoo Park, Shihjin Chang, Tetsuya Yokomoto, NEC APAC Opto Electronics Ligent Photonics Eudyna Devices Hitachi OE Solutions Delta Electronics Fujitsu Access September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 2

3 Discussion High Power vs Low Power - Hazard - Crosstalk - Optics Assembly Discussion Reminder Summary September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 3

4 @ONU ONU Sensitivity BER<10-3 w/ E-FEC OLT Launch (min) OLT Launch (max) ONU Overload -1-2 High-Power vs Low-Power (D/S) PX10 PX20 B++ λ : 157x nm CH IL (db) Path Penalty (db) EML-Tx, <20km ER (db) ONU Sensitivity BER<10-3 w/ E-FEC OLT Launch (min) OLT Launch (max) ONU Overload av_0705_takizawa_1.pdf September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 4

5 But - Class 1M optical power still high - Trained and skilled hands necessary for high-power light beam handling Class 1M Laser Safety IEC ,-2 : Safety of laser products-part1, -Part2 Class 1 : safe even viewed with instruments Class 1M : safe if not using instruments LD Class Max. Output Power Distance from Source Class 1 <+10 >14 mm Class 1M <+21 >10 cm +21dBm SM fiber output burns paper within 10mm 3av_0611_kolesar_1.pdf September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 5

6 Foolproof Scheme Optical Output Power Levels High-power system Low-power system OLT output max. +13 dbm (Class 1M) +5 dbm (Class 1) 8-fiber bundle cable total +22 dbm (Class 3B) +14 dbm (Class 1M) 8-fiber ribbon cable total after 4-split in CO +16 dbm (Class 1M) +8 dbm (Class 1) EDFA Shutdown Full Service Shutdown Reflection 1 Fiber Active EDFA 1:4 Splitter Accurate shutdown threshold necessary within 7 db September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 6

7 Failsafe System - Individual foolproof system necessary for high-power system depending on each carrier fiber plant structure - Accurate threshold adjustment necessary for EDFA shutdown depending on the splitter connections and reflection coefficient - Foolproof means; EDFA Shutdown and Connector Shutter, may make the hazard probability quite small But Still not perfect for millions of OLTs and thousands of workmen Class 1 1 low-power system realizes the strong FAILSAFE system - Without any foolproof tricks and - Free from the fiber plant structure Caution : Never gaze into the fiber at any time, even if you know it is safe!! September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 7

8 Crosstalk to Video - Non-linear crosstalk can have significant impact on low frequency amplitude modulated CATV signal quality with high-power 10G D/S signal at wavelengths from nm (3av_0707_mao_1.pdf) Low-power system with full coexisting nature can only be acceptable as a world-wide wide FTTH, FTTH 22K esp. in the regions where CATV services are widely spread 10.8M DSL 18.5M USA CATV Other 781K World Broadband Subscribers Source: Next Generation Broadband Strategy 2010, Singapore Australia Ministry of Internal Affairs and Communications, Japan (May, 2005) September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 8 GB 6.9M 145K 59K Germany 3.5M 1.8M 5.1M 433K France 6.7M Korea 4.2M China 233K 1.2M 42.8M BBtotal Malaysia 288K 219K 2.9M 13.7M Japan 1.1M 3.0M 24K 404K 14K

9 3av_0707_mao_1.pdf September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 9

10 Optics Assembly Totally separate optics by using EDFA needs lots of space margins, assemble time, and cost - Integrated optics impossible Current BIDI/XFP (SFP+) assembly not fully applicable -Big EDFA size +10dBm compact L-band EDFA with uncooled 1480nm pump commercially not available - Additional space necessary Fiber splices or connectors and fiber handling 10G TX Current simple BIDI/XFP assembly is available only for low-power system High-Power System?? Fiber Splice EDFA Fiber Splice WDM 1G/10G September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea RX 10 10G TX 1G TX 1G/10G RX Low-Power System 1G TX WDM Fiber Plant Fiber Plant

11 Component availability Laser safety Co-existence Optics Assembly Upgrade possibility (Green field) Cost Discussion Reminder Low-Power System - Hi.-pow. EML commercially available - in outdoor OK - Class 1 strong failsafe sys. - No failsafe tricks necessary - Full co-existence OK (GEPON, GPON, Video) - Current BIDI / XFP applicable - GEPON OLT size feasible - Long reach (>20km) - More splits (>4x) (using optical amp. booster) - Cost effective up split - Initial CAPEX very small - Replacement OPEX small High-Power System (@ONU) - +10dBm compact L-b. EDFA not avail. w/ uncooled 1480nm pump - SOA not yet in the field - Need additional foolproof means - Failsafe design depends on each carrier fiber plant - Crosstalk spoils analog video - Separate optics doomed and BIDI not fully applicable - Big EDFA size w/ fiber handling - OLT footprint increase costs replacement OPEX - Dangerous and difficult (No room for higher power) - Slightly cheaper split (Total optics cost assumption) Early service - Easy due to small initial CAPEX - OLT cost not carrier friendly penetration World service - Full service available - Rejects analog video users September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 11

12 Longer-Reach Relative cost AMP AMP dbm 40 km dbm Total Optics Cost Power Limit 50 km Extension and Cost w/booster ONU Only More-Subscribers dbm 128 Subscribers September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 12 AMP AMP dbm 256 Subscribers 3av_0707_hamano_2.pdf

13 Low-Power Solution for 10GE-PON is - Perfect Failsafe and Fiber-Plant Independent with Class 1 optical output - Fully Compatible and World-Wide Wide Acceptable with existing video overlay - Small and Simple applying current BIDI/XFP-ready assembly - Just Fit and Suitable Summary for the IEEE standardization Goal for the world-wide total service flexibility September 11-13, 2007 IEEE 802 Interim Meeting, Seoul, Korea 13