New CMOS chip can process both light and electricity (opens in new tab)

(arstechnica.com)

45 pointshighsea10y ago7 comments

7 comments

> The processor itself is a dual core RISC-V, an architecture used in academic circles; it's capable of operating in the gigahertz range.

It's nice to see RISC-V getting adopted more and more. I wonder how long it will take until I will own a product with one or more RISC-V processors.

_chris_10y ago

This paper uses the open-source Rocket-chip processor (https://github.com/ucb-bar/rocket-chip), which is the same processor being used (and modified) by lowRISC. So hopefully you can buy RISC-V in the not-to-distant future!

justifier10y ago

    Moving data around inside a computer means shoving it 
    through wires, which have inherent bandwidth 
    limitations and produce a lot of heat. Once that data     
    hits a network, however, it often runs across optical 
    hardware, which can send information long distances 
    at high bandwidth without needing a dedicated nuclear 
    reactor for power.

is the goal reduced power consumption?

_chris_10y ago

It's both increased bandwidth and lower energy. It'd be useless if it blew the thermal budget to achieve the higher bandwidth.

justifier10y ago

can you explain the mechanism for the bandwidth increase?

do the photovoltaics act as logic gates? doing calculations?

if the mechanism that is controlling the optics is electric:both transmitting and receiving; it would seem the throughput would be the same as pure electric

i understand fiber optic because light will travel a longer distance faster than an electric field propagated through wire, but these chips are built using atomic scale welding techniques(i)

(o) https://www.youtube.com/watch?v=NGFhc8R_uO4&feature=youtu.be...

PascLeRasc10y ago

I appreciated the 12:36 AM time in the video - most researchers I know seem to work best after 10 at night.

williamjennings10y ago

Here is the Nature paper:

http://dx.doi.org/10.1038/nature16454

j / k navigate · click thread line to collapse

7 comments

legulere10y ago

> The processor itself is a dual core RISC-V, an architecture used in academic circles; it's capable of operating in the gigahertz range.

It's nice to see RISC-V getting adopted more and more. I wonder how long it will take until I will own a product with one or more RISC-V processors.

_chris_10y ago

justifier10y ago

    Moving data around inside a computer means shoving it 
    through wires, which have inherent bandwidth 
    limitations and produce a lot of heat. Once that data     
    hits a network, however, it often runs across optical 
    hardware, which can send information long distances 
    at high bandwidth without needing a dedicated nuclear 
    reactor for power.

is the goal reduced power consumption?

_chris_10y ago

It's both increased bandwidth and lower energy. It'd be useless if it blew the thermal budget to achieve the higher bandwidth.

justifier10y ago

can you explain the mechanism for the bandwidth increase?

do the photovoltaics act as logic gates? doing calculations?

if the mechanism that is controlling the optics is electric:both transmitting and receiving; it would seem the throughput would be the same as pure electric

i understand fiber optic because light will travel a longer distance faster than an electric field propagated through wire, but these chips are built using atomic scale welding techniques(i)

(o) https://www.youtube.com/watch?v=NGFhc8R_uO4&feature=youtu.be...

PascLeRasc10y ago

I appreciated the 12:36 AM time in the video - most researchers I know seem to work best after 10 at night.

williamjennings10y ago

Here is the Nature paper:

http://dx.doi.org/10.1038/nature16454

j / k navigate · click thread line to collapse