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I'm surprised they use flip chip tech in something this expensive. Flip chips tend to be sensitive to light and this is after all a laser module. Raspberry pi h
by GekkePrutser 4y ago
I'm surprised they use flip chip tech in something this expensive. Flip chips tend to be sensitive to light and this is after all a laser module. Raspberry pi had lots of issues with photosensitivity in its flip chip wifi controller. Use flash nearby and it would reset.
If it were me I'd just spend the 10c for the plastic..
Also really surprised the laser colors are only 4.5nm apart!
The size is amazing by the way.. I worked with fiber tech in the late 90s and a 16-colour DWDM multiplexer was the size of a full rack!
- mmastrac 4y agoPerhaps it's a heat thing, plus the flip chips are in a separate space from the lasers.
- adql 4y agoI'd guess it's wanting for laser frequency to not shift with temperature
- pantalaimon 4y agoThe STM32 is not responsible for generating the laser frequency and will not produce much heat on it's own
- justsomehnguy 4y ago> Flip chips tend to be sensitive to light and this is after all a laser module If a laser shines through to the chip then your SFP is dead already. SFP module has a metal case, SFP socket has a metal casing and usually surrounded in more metal around, be it a switch or a server.
- aidenn0 4y ago> Also really surprised the laser colors are only 4.5nm apart! Sounds tiny when you are talking about wavelengths, but convert to frequency and it's 3THz in near-IR.