Good work everyone. We need to make a fiber termination device using sg3525, tc4427 and 1000v mosfets. There will be a 24/750 v transformer at the output of the mosfets. Since this is my first physical project, I need your help. Can you help me with a design scheme, especially for the part up to the transformer?

 

Is this some kind of student assignment?

What is a 'fibre termination device'?

 

If it is fiber splicer.
Then you are way over your head as a beginner.

 

I agree with @R!f@@ , if you are trying to make a fusion splicer you may be biting off more than you can chew. To make a good splice in a SMF, you need to know the time and temperature during the splice, you would likely want a motorized stage to align the fibers, and you will also likely want an automated test to determine the dB loss across the splice.
Fiber splicers are expensive for a reason. They are well tuned devices that take several design cycles to get right. Putting two fiber ends next to each other, turning on the fusion heater, and hoping for the best is not going to work.

Also, if this is your first project, I would *strongly* advise against making something that uses 750V! That voltage can kill you pretty quickly.

 

First, you will need to study the Nuts and Bolts of how a works. You can, of course, use a good cigarette lighter to join fibres, but that will be a decorative piece.

 

My guess is that in this instance the "fiber termination device" is actually the circuit assembly/arrangement that Somehow interfaces with the transformer, using the sg3525, tc4427 and 1000v mosfets. Unfortunately details such as the intended function of the interface are not included with the request. So any suggestion will be a wild guess, at best.

And everybody else, please understand that a "fiber termination" is certainly not to be considered as a "fiber splice." It isTotally different in every aspect.
Consider that a "transmission line termination" is often an input to some sort of circuit, or possibly just a resistor.

 

My guess is that in this instance the "fiber termination device" is actually the circuit assembly/arrangement that Somehow interfaces with the transformer, using the sg3525, tc4427 and 1000v mosfets. Unfortunately details such as the intended function of the interface are not included with the request. So any suggestion will be a wild guess, at best.

And everybody else, please understand that a "fiber termination" is certainly not to be considered as a "fiber splice." It isTotally different in every aspect.
Consider that a "transmission line termination" is often an input to some sort of circuit, or possibly just a resistor.

From my understanding, 'fiber termination' refers to splicing a raw fiber on to an optical connector, which is usually sold as a pigtail. So to terminate a fiber means fusion splicing the fiber to the pigtail, presumably with as little optical loss as possible. In this regard, it would make sense that the OP is planning on using a 750V AC output from a transformer, and using the mosfet and mosfet driver that they mentioned to drive a small furnace. This is all fine and good, but the core of a typical 'single mode' fiber is usually around 0.01mm, and the commercial fusion splicers on the market typically go for around $10,000 because they not only have to control heat, but they have to make precision movements to align the core of the fiber and the core on the pigtail. Something tells me that, even if OP did not kill himself with 750VAC, there is no way they would be able to align the fiber to the pigtail. This project seems doomed from the start. Just my opinion though.

 

It also refers to what is on the opposite connector. AND, in addition, it is not likely that the TS was even considering attaching a FO connector, but rather plugging the cable into some control assembly.

 

It also refers to what is on the opposite connector. AND, in addition, it is not likely that the TS was even considering attaching a FO connector, but rather plugging the cable into some control assembly.

OK. We will never know because the OP will likely never return to this topic. But I wonder, if OP was actually talking about how to terminate an optical fiber that already had connectors on it, then what is the HV power supply for? What are the high current mosfets for? It seems like everything that OP had mentioned has to do with creating a heater. I'm still not really sure exactly what you are thinking was meant by "terminating" a fiber. Optically, you can terminate a fiber by just plugging it in to a receptacle. There are no electrical components until you get to the very moderately speced photodetector. There is nothing high voltage or high current about it. There are no terminating resistors. There is no bus resistance or capacitance.

Additionally, "terminating' an optical fiber is very common terminology in the field, and it means splicing a connector on the end. I think you might be reading too much in to it.

Again though, just my opinion.

 

It certainly was clear to me that the TS was hoping to control some high voltage circuitry remotely with a fiber optic link. AND, mostly now, fiber optic cables are installed into the connectors that plug into the termination electronics. Think about the FO cable between the optical sound output on the TV and the optical input on the surround sound console.