| First,
Why are you asking? Is this something that a customer is asking
for, or is this a, "For your information," type question. Also in what
context is the question being asked?
As it stands now, DIGITAL stands by the products that were
designed for 1300 nM operation, for use at 1300 nm operation only.
So in this sense the answer is, "NO."
As to whether or not a 1300 nm receiver will work with a 1550 nm
transmitter is uncertain. Issues such as PIN diode structure will
determine responsivity variations due to wavelength. While it is
true that text books show that specific compounds have good
responsivity over a wide range of wavelegths, I CANNOT make a
blanket statement.
The next obvious question is how the 1300 nM station transmitter
is going to talk to the 1550 nM station receiver. FDDI has data
flowing bi-directionally, so I gather that your 1550 nM system will
want to receive as well as transmit?
Why is this person using 1550 nM, is there a specific need for it?
Are there any other issues that you may have not thought of?
Systems running 1550 nM are often long haul, using dispersion shifted
single mode fiber. Clearly a 1300 nM transmitter may not be able to meet
the loss budget of such a system.
Is the customer using single mode fiber? How much? Whats the
link loss at each wavelength?
If someone really needs to know then we can probably get an answer
but otherwise the answer is, "NO." Please let us know more about
the circumstances.
Jonathan
|