Tolerable power loss in connector (heat generation)
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Posted by on July 13, 2007, 6:36 am
Please log in for more thread options I am using a fiber pigtailed laser with a panda fiber and connect with an FC/APC to another panda fiber. Unfortunately I have a loss of about 4.5 to 5dB due to this connection. I have cleaned the fibers so I guess the loss is because of two different diameters. Here are my two questions: 1. How much power loss is tolerable in a connector? I am concerned about generating two much heat and damaging the fiber. 2. Is it reasonable to have such a high loss due to two different diameters in a panda fiber? Thanks | |||||||||||||
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Posted by danek on July 13, 2007, 11:21 am
Please log in for more thread options fibers; different wavelengths or switching between multimode and singlemode. In either case you could be loosing the power in the fiber not at the connection per say. You need to get a patchcord that is the same diameter as the laser one or you will always have this problem. P. Danek | |||||||||||||
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Posted by John_H on July 13, 2007, 1:09 pm
Please log in for more thread options > Hello,
> > I am using a fiber pigtailed laser with a panda fiber and connect with > an FC/APC to another panda fiber. Unfortunately I have a loss of about > 4.5 to 5dB due to this connection. I have cleaned the fibers so I > guess the loss is because of two different diameters. > Here are my two questions: > > 1. How much power loss is tolerable in a connector? I am concerned > about generating two much heat and damaging the fiber. > 2. Is it reasonable to have such a high loss due to two different > diameters in a panda fiber? > > Thanks Heat generation is typically a problem for very high power, not typical communications signal levels. Are you using watts of power? | |||||||||||||
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Posted by danek on July 13, 2007, 3:32 pm
Please log in for more thread options John_H wrote:
>> Hello,
>> >> I am using a fiber pigtailed laser with a panda fiber and connect with >> an FC/APC to another panda fiber. Unfortunately I have a loss of about >> 4.5 to 5dB due to this connection. I have cleaned the fibers so I >> guess the loss is because of two different diameters. >> Here are my two questions: >> >> 1. How much power loss is tolerable in a connector? I am concerned >> about generating two much heat and damaging the fiber. >> 2. Is it reasonable to have such a high loss due to two different >> diameters in a panda fiber? >> >> Thanks >
However you can blow up the ends if they are FC/PC connections. You get
> Heat generation is typically a problem for very high power, not typical > communications signal levels. Are you using watts of power? > > a little piece of dirt in there and you have one nice Fabry Perot cavity!! Does a lovely job of blowing the fiber ends up. P. Danek | |||||||||||||
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Posted by on July 18, 2007, 3:09 am
Please log in for more thread options Hello
Meanwhile I found out that the fibers have a different NA(0.19 vs 0.11) and a different core-diameter(12.5 vs 8.7). I guess that explains the loss. I intend to use up to 2W. Is it possible to buy a patchcord for differnt diameters and NA? I have tried to find one but I was't succesful. I would appreciate if someone could post a web address. Thanks | |||||||||||||
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>
> I am using a fiber pigtailed laser with a panda fiber and connect with
> an FC/APC to another panda fiber. Unfortunately I have a loss of about
> 4.5 to 5dB due to this connection. I have cleaned the fibers so I
> guess the loss is because of two different diameters.
> Here are my two questions:
>
> 1. How much power loss is tolerable in a connector? I am concerned
> about generating two much heat and damaging the fiber.
> 2. Is it reasonable to have such a high loss due to two different
> diameters in a panda fiber?
>
> Thanks
>