Presentation Outline
>IEEE Goals
>Current Specification
>Alternatives
>Current Work
	-EIA/TIA
	-Internal
>Summary

Optical Goals of 802.3z
1000 Mb/s Data Transmission (1.25 MB/s)
Full and Half Duplex Operation
Link distance of 500 meters over multimode Fiber
BER of 10-12 

Proposed Optical Specification
Bit Rate	Mbaud	1250
Tolerance	PPM	100
Bit Error Rate		10-12
	Transmitter	
Type		Laser
Wavelength	nm	770 - 860
Spectral Width (RMS)	nm	4
Po Max	dBm,avg	-4 @ 850 nm
Po Min	dBm,avg	-10
Extinction Ration	dB	9
RIN (max)	dB/Hz	-117
	Receiver	
Pin, Max	dBm,avg	0 (-4)
Pin, Min	dBm,avg	-17
Link Length	m	200

Alternatives
Long Wavelength Lasers
Selective ( Single ) Mode Launch
Short Wavelength Laser at 200 meters

Current Work
EIA is currently examing Modal Bandwidth of MM Fiber
Data presented on single mode launch by HP, Corning, NIST, and Honeywell
41 Fibers at various locations

Potential Benefits
Reduce Misalignment Loss
Increase BER performance
Increase Bandwidth
Extend Link Distance

Slide showing Graph of Alignment loss comparison of OFL vs. SML

Slide showing Graph of BER comparison of OFL vs. SML

Fiber Bandwidth
Results of Single Mode Launch Testing
Fiber	SM Launch	30 um Launch	50 um Launch	OFL
HR1	>3000	n/a	n/a	612
HR2	1780	n/a	n/a	450
HS1	>3000	1152	580	480
HS2	>>3000	2580	1180	670
HS3	>3000	1570	620	438


SUMMARY
Selective Mode Launch should eliminate problem with Modal bandwidth of 
fiber for 500 meter links
Selective Mode Launch should increase BER performance
Selective Mode Launch should reduce connector losses
Selective Mode Launch and 850 nm lasers will allow us to acheive the 
goals of IEEE 802.3z