Breaking News
Comments
Newest First | Oldest First | Threaded View
MeirG
User Rank
Rookie
re: Photonic PCBs inching closer
MeirG   2/7/2013 12:19:28 PM
NO RATINGS
Well, we now need optical connectors to optically couple signals on a plugin board to its motherboard...

junjunwu168
User Rank
Rookie
re: Photonic PCBs inching closer
junjunwu168   2/7/2013 1:54:53 AM
NO RATINGS
If the waveguide is not isolated it is probably in touch with the polyimide FPCB. PI has higher RI than silicone. So to form a lossless waveguide during bending in smaller diameter you will need a low RI cladding to the silicone. Fluoropolymer is probably the only choice for silicone. Am I missing something?

krisi
User Rank
CEO
re: Photonic PCBs inching closer
krisi   2/5/2013 8:01:28 PM
NO RATINGS
Cool technology...would anyone be interested in presenting it at emerging technologies symposium in Grenoble in 2014? www.cmosetr.com, kris.iniewski@gmail.com

jeremybirch
User Rank
CEO
re: Photonic PCBs inching closer
jeremybirch   2/5/2013 3:07:13 PM
NO RATINGS
1) silicone is a analogue of carbon based polymers - but the chain is of silicon atoms not carbon ones. There are many different silicones. 2) do they deposit the silicone in tracks or are they coating a whole board then etching it? I don't think 45 minute drying time is very practical if you have to deposit it as tracks, but as a board coating it might just work

resistion
User Rank
Manager
re: Photonic PCBs inching closer
resistion   2/5/2013 2:27:37 PM
NO RATINGS
If the index difference is that large, you have to worry about coupling loss from reflection at the waveguide end.

IBMLabs
User Rank
Rookie
re: Photonic PCBs inching closer
IBMLabs   2/5/2013 1:07:56 PM
NO RATINGS
With waveguides, loss-less bends can be made in case the index contrast is large enough compared to the bending radius of the bend. In the optical ray model, the total internal reflection condition is then still satisfied.

resistion
User Rank
Manager
re: Photonic PCBs inching closer
resistion   2/5/2013 8:22:31 AM
NO RATINGS
Any optics person would know bends in waveguides cause light loss as total internal reflection is no longer satisfied.



Flash Poll
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Rishabh N. Mahajani, High School Senior and Future Engineer

Future Engineers: Don’t 'Trip Up' on Your College Road Trip
Rishabh N. Mahajani, High School Senior and Future Engineer
1 Comment
A future engineer shares his impressions of a recent tour of top schools and offers advice on making the most of the time-honored tradition of the college road trip.

Max Maxfield

Juggling a Cornucopia of Projects
Max Maxfield
7 comments
I feel like I'm juggling a lot of hobby projects at the moment. The problem is that I can't juggle. Actually, that's not strictly true -- I can juggle ten fine china dinner plates, but ...

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
37 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Karen Field

July Cartoon Caption Contest: Let's Talk Some Trash
Karen Field
138 comments
Steve Jobs allegedly got his start by dumpster diving with the Computer Club at Homestead High in the early 1970s.

latest comment hw20110 Wish I could have a car like that!
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)