Fiber Optic Communication in Space

Dear friend, You can easily find the topic of Optic fibre on the search engine of google. Look just open google.com and then enter the words" Fiber Optic Communication in Space " and you will find the sites related to your topics

I ve all readily serch the engine ,but it didnt specify the material i need

But in what way is optical fibre/fiber communication different in space from terrestrial?