Fibre Optic Visual Fault Locator

Hi All,

After much searching, with no luck, I thought to give you guys a go.

I am looking to build a 30-50 mW 635nm Red Laser Fibre Optic VFL. For those who do not know what a VFL is, its used to find breaks, or can identify individual fibres within a cable, by connecting the unit to a terminated fibre connector.

The ones on the market at the moment are generally only 1 way, ranging 1-30 mW & have a range in fibre, of approx 25km, in Singlemode fibre (9/125). They are also only battery powered, & the battery life aint great, if you get nearer the 30 mW end!!

The

I want to build one with a 30-50km range in fibre. With the high power, I am hoping it will be easier to identify the fibres, in daylight.

I am looking to build a 4 way unit, so I can look down up to 4 fibres, which is mains, & battery powered.

If anyone has built, or knows what I am trying to do, please help.

Thanks up-front.

The existing 25km units on the market sell for
how much???
Do you have a link to one of those VLF units...:thinking:

Jerry

lasersbee said:

The existing 25km units on the market sell for
how much???
Do you have a link to one of those VLF units...:thinking:

Jerry

Click to expand...

Hi Jerry,

This is a typical one:

RY-V3105 Pentype Visual Fault Locator - Product - Shenzhen Ruiyan Technology Co., Ltd.

They sell for approx $100 plus shipping.

Cost is not really an issue, I want to build something to do the job I want it to do!!

Thanks.

Could you make one that 532 nm? That would help the Issue with seeing it in the day light.

Find faults when and where? 50km is a long way to walk looking for a tiny light. Even if it were on a reel, the many wraps would block the light and you're unlikely to see anything. And that is IF the fault has broken the outer jacket. If you're just testing continuity, pointing a low-medium power green in one end should be plenty.

Tell us more about what you're actually testing for.