Emcore vs. Agilent RX modules

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Emcore vs. Agilent RX modules
Dirk Wiedner, Physikalisches Institut der
Universität Heidelberg
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Optical receivers choice
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What is the choice based on?

• Transmission reliability
• Optical data transmission must not degrade
  operation
• Bit Error Rate of lt10-15 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)

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Optical Properties

• Input sensitivity of new Emcore MRX9515 5dB less
• Agilent HFBR-782B or Emcore MRX9512 ok.
• Fiber Length
• 13m Breakout 25m 120m 1m typical

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LHCb Tests (1/2)

• Muon Trigger
• numerous tests with Agilent HFBR 782B
• RICH
• detailed tests with Emcore MRX9512
• ST / OT
• tests with both

GOL VCSEL Emcore MRX9512
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LHCb Tests (2/2)

• Final qualification procedure (suggestion)
• BERT with
• LHCb GOL-VCSEL or 12-way Transmitter _at_1.6 Gbps
• 15m breakout30m patch cord120m1m patch cord
• extra 6dB attenuation
• maximum BER 10-12
• Repeat test for 10 receiver samples
• Possibly ORCTest card opt. attenuator useful

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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

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Availability

• Agilent HFBR782B was available lately
• Emcore MRX9512 bought last year
• Emcore MRX9515 unacceptable as replacement
• product policy unclear
• Other competitors
• Picolight
• Zarlink

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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

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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