ECE 135 – Group 3 Presentation 4 Bryan Chavez with Pat Cleary & Kevin Parker February 10 th, 2005 February 10 th, 2005.

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Presentation transcript:

ECE 135 – Group 3 Presentation 4 Bryan Chavez with Pat Cleary & Kevin Parker February 10 th, 2005 February 10 th, 2005

Work Summary Further Research into VCSELs Researched ROSA Solutions in place of PDs Four Corners Analysis for multiple candidate VCSELs Contact vendors Further Optical Link Budgeting Test and Build Tx Board

GANTT Chart

Background Work for Four Corners and Optical Link Budget Eye safe limit → P max = 1 mW From the standard → extinction ratio = 9dB Thus we see that P min = P max *10^(-9/10) P min = mW Maximum Link Power Budget Loss at Rx from Standard = 7.5 dB

VCSEL Four Corner Analysis (A) HFE439x-521 ManufacturerPartI_th (mA) η (mW/mA) I_tot(MAX) (mA) I_tot(MIN) (mA)I_bias (mA)I_mod (mA) Advanced Optical Components (2.5G) SCHFE439x Advanced Optical Components (2.5G) SCHFE439x Advanced Optical Components (2.5G) SCHFE439x Advanced Optical Components (2.5G) SCHFE439x

VCSEL Four Corner Analysis (B) ManufacturerPartI_th (mA) η (mW/mA)I_tot(MAX) (mA)I_tot(MIN) (mA)I_bias (mA)I_mod (mA) Emcore (2.5) TO Emcore (2.5) TO Emcore (2.5) TO – Emcore (2.5) TO TO - 46

VCSEL Four Corner Summary Part Current Requirements Connector?NotesPrice AOkLC LC Only USA $7.25 (1k+) $14.50 (1-999) BExcellent LC or SC LC Available SC? USA Unknown (1k+) Free (small quantities)

ROSA Datasheet ROSAMin (V/W)Typical (V/W)Max (V/W)NotesPrice Luxnet (1.25) (LC or SC) 5000 Taiwan ? Optowell (1.25 or 2.5) (LC or SC) 2000 Taiwan ? AOCtech (1.25) (SC)PTCM966-SC.5 A/W? USA ? Advanced Optical Components (up to 2.5) (SC)HFD USA $5 (1-999) $10 (>1k) Advanced Optical Components (up to 2.5) (LC)HFD USA $5 (1-999) $10 (>1k)

Draft Optical Link Budget Advanced Optical Components HFE419x-541 with HFD ROSA Ith (mA) 1.8 DC Bias of laser (mA) Slope Efficiency (mW/mA) Modulation Current of Tx (mA) Range of Power Output (mW) Range of Power at Rx (mW) – 7.5 dB Loss Voltage Output Range from ROSA (mV) – Voltage Input Range for Maxim 3264 (mV)

Tx Board Construction

Tx Board Performance 0 dB Attenuation BER: < 10^-9 1 Minute Duration

Tx Board Performance 10 dB Attenuation BER: < 10^-9 1 Minute Duration

Tx Board Performance 20 dB Attenuation BER: < 2x10^-7 1 Minute Duration

Tx Board Performance 30 dB Attenuation BER: NO SIGNAL 1 Minute Duration

Links for VCSELs & ROSAs cuments/HFE438x-521.pdf ps.pdf duct/documents/HFD pdf duct/documents/HFD pdf

Future Work Order VCSEL/ROSA Build and Test Rx Board Finalize Optical Link Budget Design Board 1 Schematic Design Board 1 Layout