Looking for info about optical filters

I want papers, books or articles on optical filters. If someone here has been working on this field, please share with me some documents and your experiences?

In addition, have you got some docs on Wavelength-Selective-Switch (WSS), please share here with us. I will not forget the HELP button ;)

Hi ,,

Check This for avaraiety of models on optical fibers

http://www.imodelit.com/ViewProducts.aspx?CID=101

and this book about optical fibers:

https://www.edaboard.com/viewtopic.php?t=238878