From: Wenbin Jiang [mailto:Wenbin.Jiang@jdsu.com]
Sent: Friday, May 11, 2007 8:47 AM
To: Lee, Dong-Soo; Lingle, Jr, Robert (Robert); Hajduczenia, Marek
Cc: glen.kramer@teknovus.com
Subject: RE: 10G EPON components
Robert,
The cost estimate is listed in the following table, which you may post to the reflector.
|
|
ONU |
OLT |
Cost/User | |||
|
|
|
|
|
|
1:16 |
1:32 |
|
Option 1 |
TOSA: DML DFB (+3 to +5 dBm) |
5x |
TOSA: EML (+8 to +11 dBm) |
43x |
9.0x |
7.5x |
|
|
-40 to 65C |
|
with SOA or EDFA |
|
|
|
|
|
ROSA: PIN/TIA |
x |
ROSA: APD/TIA |
4x |
|
|
|
Option 2 |
TOSA: DML DFB (+3 to +5 dBm) |
5x |
TOSA: EML (+3 dBm) |
10x |
9.9x |
9.4x |
|
|
-40 to 65C |
|
|
|
|
|
|
|
ROSA: APD/TIA |
4x |
ROSA: APD/TIA |
4x |
|
|
A few comments:
- It will be very challenging for the 10G APD to operate at below -20C. Normally, we spec it to run from -5C to 70C.
- I assume that cooled EML will be used in the OLT. Otherwise, it will be difficult to achieve +3 dBm at high end of the temperature range.
- +3 to +5 dBm launched power from uncooled DML can be costly due to poor yield.
Wenbin
Wenbin Jiang, PhD
Strategic Marketing & Advanced Technology
JDSU Transmission Module BU
430 North McCarthy Blvd
Milpitas, CA 95035
Tel: (408) 546-5817
1. Upstream: Depending on
assumptions, the ONU will require a DML DFB,
able
to meet -40 to +65C temperature
requirements, with minimum average
output
power between +3 and +5
dBm.
2. Downstream: APD at the ONU, the Tx at the OLT will need to be an
EML
with
+3 dBm minimum average output power.
3. Downstream: PIN at
the ONU, The Tx at the OLT will need to be an
amplified EML with +8 to +11
dBm minimum average output power
The Power Budget Ad Hoc seeks input on
the technical and economic
feasibility of these components.
We have
been considering costs as multiples of a PIN-PD, with the
assumptions a
standard EML TOSA = 10 x PIN-PD and standard DML TOSA = 2
x
PIN-PD. How
would the proposed components raise the relative
cost?
