nanog mailing list archives
Re: optical circulator as a bidirectional one fiber solution
From: Brandon Martin <lists.nanog () monmotha net>
Date: Mon, 13 Aug 2018 18:35:21 -0400
On 08/13/2018 06:24 PM, Ben Cannon wrote:
What about 100Ghz ITU spacing on the tx, are the rx optics broad enough to take the off-band input?
Non-coherent receivers usually seem to even when paired with DWDM grid transceivers. You're paying for the tightly controlled laser on those, not so much the receiver.
Coherent of course will demod whatever you tune them to (and pretty well reject other stuff) but are therefore subject to their LO tuning range.
Figure your typical OOK optical receiver is roughly like a single-stage AM radio receiver (crystal radio or similar, just followed by amplification to logic level) without any front-end filtering on it. The demux in front of it, where present, is the front-end filter. It'll capture and downconvert to RF basically anything it sees.
-- Brandon Martin
Current thread:
- optical circulator as a bidirectional one fiber solution Baldur Norddahl (Aug 07)
- Re: optical circulator as a bidirectional one fiber solution Daniel Corbe (Aug 07)
- Re: optical circulator as a bidirectional one fiber solution Eric Kuhnke (Aug 13)
- Re: optical circulator as a bidirectional one fiber solution Ben Cannon (Aug 13)
- Re: optical circulator as a bidirectional one fiber solution Eric Kuhnke (Aug 13)
- RE: optical circulator as a bidirectional one fiber solution Jameson, Daniel (Aug 13)
- Re: optical circulator as a bidirectional one fiber solution Ben Cannon (Aug 13)
- Re: optical circulator as a bidirectional one fiber solution Brandon Martin (Aug 13)
- RE: optical circulator as a bidirectional one fiber solution Jameson, Daniel (Aug 13)
- Re: optical circulator as a bidirectional one fiber solution Eric Kuhnke (Aug 13)
- Re: optical circulator as a bidirectional one fiber solution Jared Mauch (Aug 13)
- Re: optical circulator as a bidirectional one fiber solution Daniel Corbe (Aug 07)