Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
MeirG
User Rank
Author
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
Author
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
Author
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
Author
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
Author
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
Author
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
Author
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.



Radio
LATEST ARCHIVED BROADCAST
As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Like Us on Facebook
Special Video Section
The LTC®6363 is a low power, low noise, fully differential ...
Vincent Ching, applications engineer at Avago Technologies, ...
The LT®6375 is a unity-gain difference amplifier which ...
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LTC®2983 measures a wide variety of temperature sensors ...
The LTC®3886 is a dual PolyPhase DC/DC synchronous ...
The LTC®2348-18 is an 18-bit, low noise 8-channel ...
The LT®3042 is a high performance low dropout linear ...
Chwan-Jye Foo (C.J Foo), product marketing manager for ...
The LT®3752/LT3752-1 are current mode PWM controllers ...
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...