A Chip That Can Transfer Data Using Laser Light

Would the dust that gets trapped inside a PC's housing interfere with the optoelectronics? Most home and office PCs get pretty dirty inside.

In IR communication, dust may not affect communication, but in visible it will. It is often IR that is used in communication, hence can take on dust easily.

what will be the cost of the project

First define the actual project and then ask ffor estimate. Are you looking for ready to use product?

Is your data ASCII text?

What is data rate and size of data packet in bytes?

You can find my email on my web site.

haloo im new in this field...

just now i wanna ask about the application of laser,where we can tranfer data in ASCII text, my question what the requirement i should have, n what kind of hardware i should design for it??please help me

This process is almost similar to transmission of Radio waves. It requires modulation and demodulation of the modulating signal over some higher frequency. Energy source is light here and detector is photo-sensor.

yes i know about it, just i have build a hardware using PIC, photo detector and other component. this hardware only can transfer data only in ASCII code, not by word. so can u explain to me how do i need to renovated my design so that it can transfer by word and add the range.

has this technology been worked out today. i mean today are we using it to make computers or work is still going on in this field and would it take time for them to come to success. what are the hurdles we are facing?

Nope, the optics would be a closed system, no opportunity for dust to get inside the chips.

You wouldn't even know it was optic to look at it, just another bunch of silicon.

What am I missing! Where's the innovation? Solid-state/semiconductor lasers have been around for years, so lasers have been able to send data for some time. I see the innovations in how high-speed data will be modulated (by silicon based chips). Fast switching liquid crystals have been advancing since the 80's for this reason.

If you say that putting LASER on uC chip is no great things then perhaps you are no where near this technology.

LASER is not really not a diode alone. Else it will be called LED. It requires tower structure to be built on IC to make it multi layered LASER device. If it was simple then why only IRDA were for last 15 years and no LASER device could ever be made in chip with other logic that goes in uC.

It was some time ago that ORNL has developed a LASER chip with LOGIC and Solar cell that was mounted on back of the honey bee to treck them. You may still find that info at www.ornl.gov new technology list. ORNL is a part of the NRC, USA.

Like it's been said, semiconductor lasers have been out there for a long time. They are used in everything from cd players to fiber optic networks and laser pointer toys. Today's lasers are not gas tubes anymore, they are all silicon based chips. Multiple laser beams per one silicon die it's not a problem either, my company does that. But so far the laser source was a separate chip that is linked to the data chip thru complicated conections and convertors. That makes the technology to expensive for a comsumer computer.

The big inovation would be if the processor/data chip will be integrated on the same die with the laser source. That could prove cost effective for mass production. But the whole assembly needs to be carefully sealed if the laser beams are supposed to tarvel thru free-air. The other option would be to send the laser beams thru fiber optics from one component to another, but fiber coupling it's again too costly. Direct beams would make more sense.

You do not still catch the idea.

Making a semiconductor LASER is easier and has been there. Heuges was doing it for USA Government for last 25 years.

Making it on uC chip is not all that easier even today. Who so ever did it has special means to do it.

What you see in CDROM reader writer is a laser diode and not an IC with other logic.

Laser diode is more on Z-axis and ICs are more on x-y plane with small z. You need to be a semiconductor technology man to usederstand the idea.

sir i want to trasnfer the file from one system to another system through laser light. so please help me out in this .. my email id is

rashid09@gmail.com

thank you.

To transmit and receive data between two computers, you need a program to do this task. Hyper-terminal program is the one ready to use type for ASCII data files. For binary data you need some kind of special communication method to either transmit data in HEX format or let the receiving program know the number of bytes being transmitted. There is no end of file mark in binary eight bit data and there is no way to tell when files in to be closed. ASCII files contain end of file mark which is ^Z.

Perhaps you can also use TCP/IP and modem to modulate and demodulate LASER light to transmit and receive data. DC communication works only on short distance of few cm and modulated light will transmit and receive even at km distance.

Unless your level of understanding is known, it is rather difficult to advice the kind of software you may be able to develop yourself.

Reading once again your comments, I feel that you have good grasp of the technology. It has been very challenging to integrate support analog high charge/current pulse high voltage components, along with temperature sensor on the chip, and then hot laser diode on the same chip making it a complete analog laser device, and then moving a step further to integrate the programmable logic device to do some programming. Often Hybrid devices were good substitute, however now that many new applications have emerged that use laser as tool for medical and biological or chemical sensing technology. Technology is advancing farther at very rapid rate using new high tech sensing tool that use/s laser beam with quality spectroscopic information about molecules in real environment and in real time. There is unlimited scope for sensing human health using laser tools embedded in the body and tiny chips giving out information ticks in real time.

This embedded laser technology will reach billions of people and has tremendous potential for Physics, Chemistry, Biotechnology, Computer Science and Engineering professionals for next 100 years. Technology will also find great scope in the environmental sensing and its protection.

If you are doing this, then you are at the right place and for a very good reason. People have to work here for generations and not only for few decades.