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Recommendation of Multimode fibre optics cable with wavelength 100nm to 5000nm

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prakashvenugopal

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Hi all,

I am need of Multimode Fibre optics cable which have to pass the wavelength 100nm to 5000nm.
Please let us know.


Regards,
V. Prakash
Vetal / India
 


100nm to 5000nm - just impossible

You can get fluoride crystal UV to mid IR fibre with about 300 nm to 5 µm range, or fused quartz ranging from about 200 nm to 1.1 µm. UV enhanced quartz goes down to 2 or 2.5 µm but shows absorption bands below 1.1 µm.
 

have to pass the wavelength 100nm to 5000nm...
Click to expand...

What are the source? What is the final objective? No common fiber can transmit 100nm. What is the source for 5000nm?
 

Hi,

I have to detect the light in one area which have high temperature like 150'c which can not keep my sensor in this heat. i am trying to
use the fibre optics cable to detect the light. the application of fibre optics is just to transmit the ligth from one end to other end. Please recommend the Fibre optics cable for this application.

Regards,
V. Prakash
 

Please recommend the Fibre optics cable for this application.
Click to expand...
Do you read answers? Provided you actually have a light source emitting at vacuum UV wavelength, e.g. a plasma, you need to face the fact that even best suited lithium fluoride has a rather high absorption near 100 nm, so that it can be only used up to e.g. 1 mm optical path length.
 

Hi,

Yes. actually optic fibre which i am trying to use is for light guiding application.

Regards,
V. Prakash
 

prakashvenugopal said:
Hi,

I have to detect the light in one area which have high temperature like 150'c which can not keep my sensor in this heat. i am trying to
use the fibre optics cable to detect the light. the application of fibre optics is just to transmit the ligth from one end to other end. Please recommend the Fibre optics cable for this application.
Click to expand...

Such a fibre does not exist. In my opinion you have chosen to wrong approach to measure the temperature. Use different type of sensor (like far infrared photodetector) or heat pipe.
 

I don't think that the application is temperature measurement, just some optics operating at elevated temperature.

The description involves various doubts though. Do you really expect significant emissions in the 100 to 200 nm range? Which detector do you use? Are you aware that vacuum UV is absorbed in air within a few millimeters?
 

Hi,

Yes. the application is not for temperature measurement. we have to detect the light in the Wavelenth range 380nm to 3000nm(MidIR) . It is well and good if i get the optical fibre cable with the range of 100nm to 5000nm which i mentioned in my first query.

Regards,
V. Prakash
Vetal / India
 

Dropping the illusionary 100 - 5000 nm, you are well for 380 - 3000 nm with MidIR fluoride crystal fibre, available from several vendors. It's just a simple Google search.
 

You have multiple problems:

1. Common fibres will not stand 150C for extended periods; the cladding will be damaged. It perhaps will still work with reduced efficiency...

2. So single detector will work in the whole range and you will need multiple detectors. For the IR region there will be excessive noise.
 

Hi,

For light guiding application, Single mode fibre optic cable or multimode fibre optic cable is used.?? Please let us know.

Regards,
V. Prakash
 

Hi,

Which cable will give better fidelity single mode or Multimode?

Regards,
V. Prakash
 

I have difficulties to relate the single mode question to the original question. Light guiding usually requires large aperture, about no bandwidth. Do you know typical parameters of a single mode fiber is and what it's used for?
 

Hi,

I am quite new to optic fibre cables. I dont know typical parameters of a single mode fiber is and what it's used for?
Please let us know where the multimode cables are used and single mode cables are used for? It will be helpful to me.

Regards,
V. Prakash
 

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