Emcore vs. Agilent RX modules
Dirk Wiedner, Physikalisches Institut der Universität Heidelberg
LHCb optical link meeting June 2004
Dirk Wiedner
1
Optical receivers choice
Agilent HFBR-782
Price
310 Euro
Availability
? weeks
Used in LHCb Muon
SNAP12 comp. DNC misplaced
IF14-0 comp.
Good
IF14-1 comp
Good
Emcore MRX9512
400 USD
? weeks
IT
DNC misplaced
VPP at K1, 2, 8, 9
Good
Picolight
466 USD
?
DNC misplaced
Good
Good
LHCb optical link meeting June 2004
Zarlink
483 USD
? weeks
VPP is DNC
Good
Good
XanopticsInfineon
320 USD 674 Euro
?
?
?
Not SNAP12
?
Not SNAP12
?
Bad
Dirk Wiedner
Paracer
300 USD
NO
IT/OT
Good
Good
Abandoned
2
What is the choice based on?
Transmission reliability:
Optical data transmission must not degrade operation
Bit Error Rate of <10-15 baseline
Single bit errors must not lead to global resets
Confirmation of promised performance in LHCb test
Compatibility: Rx-Module must fit on O-RxCard
Availability: Rx-Modules lead time, product lifetime
Price: Competitive price ie. 400US (500 pc. needed)
LHCb optical link meeting June 2004
Dirk Wiedner
3
Optical Properties
Parameter
Agilent HFBR-782B Emcore MRX9512 Emcore MRX9515 Picolight
Zarlink
Data rate
2,7
2,7
2,5
2,72
Input sensitivity Typ. -18.5 Max. -16 Typ. -18 Max. -16 Max. -13
-16
Input saturation Min. -2 Typ. -1
Min. -2
Min. -2
Wavelength
830-860
830-860
830-860
830-860
830-860
Stressed sens. Typ. -15.5 Max. -11,3
Typ. -14 Max. -12 Max. -11,3
Str. Eye OpeningMin. 150 Typ. 190 Return loss
Min. 12 Typ. 19
Min. 12
Min. 12
Min. 12
Min. 12
Unit
2,72 Gbps
-16 dBm
-2 dBm
nm
dBm
ps
dB
Input sensitivity of new Emcore MRX9515 5dB less
Agilent HFBR-782B or Emcore MRX9512 ok.
Fiber Length:
13m Breakout + 25m + 120m + 1m typical
LHCb optical link meeting June 2004
Dirk Wiedner
4
LHCb Tests (1/2)
Muon Trigger:
BER(3 sigma) vs. add. optical power
1,00E-07
numerous tests with
Agilent HFBR 782B
RICH:
detailed tests with
Emcore MRX9512
ST / OT:
GOL VCSEL Emcore MRX9512
1,00E-08
1,00E-09
1,00E-10
1,00E-11
1,00E-12
-10
tests with both
LHCb optical link meeting June 2004
-9
-8
-7
-6
-5
-4
-3
-2
-1
Attenuation Total dB
Dirk Wiedner
5
LHCb Tests (2/2)
Final qualification procedure (suggestion)
BERT with
LHCb GOL-VCSEL or 12-way Transmitter @1.6 Gbps
15m breakout+30m patch cord+120m+1m patch cord
extra 6dB attenuation
maximum BER 10-12
Repeat test for 10 receiver samples
Possibly ORCTest card + opt. attenuator useful
LHCb optical link meeting June 2004
Dirk Wiedner
6
Compatibility
most 12-way optical receivers close to SNAP12
O-RxCard IF14-1 can be configured for most
receivers with jumpers
Electrical characteristics effectively equal
VCSEL diode or transmitter:
output -2dBm max. (fiber loss ~0.3 dB
/interconnection)
obtain maximum optical power range
125/50 μm MM 12-way ribbon fibers MTP/MPO
LHCb optical link meeting June 2004
Dirk Wiedner
7
Availability
Agilent HFBR782B was available lately
Emcore MRX9512 bought last year
Emcore MRX9515 unacceptable as replacement
product policy unclear
Other competitors:
Picolight
Zarlink
LHCb optical link meeting June 2004
Dirk Wiedner
8
Price
up to 500 receivers necessary
all spares must be ordered now
310 Euro ea. for 180 Agilent HFBR 782 (Muon trigger)
400$ US ea. for 38 Emcore MRX9512 (O-RxCard PP)
exchange rate 400$ US = 328 Euro = 502 CHF
LHCb optical link meeting June 2004
Dirk Wiedner
9
Summary
Two major candidates
Emcore MRX9512
Agilent HFBR782
Decision must be based on
appropriate specification (enough dynamic range)
Tests in LHCb scenario
solid product policy and availability
price must be competitive
LHCb optical link meeting June 2004
Dirk Wiedner
10