anyone can help me ???

Check the absorptivity spectrum of fiber with respect to the laser wavelength. In addition, what is the difference between melting point of fiber and coating matrix? The laser processing parameters such as scanning speed and input power can be optimized in accordance with this information to melt the matrix and protect the fibers. The wetability of liquid matrix to the fibers and density difference will determine the infiltration of liquid into fibers. 

Hope this helps. Please provide your point of view so that we can build the understanding by discussions. 

Thanks very much. In my opinion, adjusting the laser processing parameters is a huge project, and I am trying to make it. In fact, I want to know that is there any  effective protection measure , like fiber coated metal layer, to achieve my goal. Or, do you have any related literatures about fiber-reinforced coatings, for me to learn.

The fibers can be coated with reflective coating provided the coating does not affect or react with those. Which materials in terms of fibers and matrix are you thinking of? I will post some papers as soon as I do a literature search.

The coating is mainly composed of Ni, Co and Ti, and the fiber is cermic fiber, like ZrO2. Thanks a lot, and I am looking forward to your reply.

Hi, so the fibers will melt at high temperatures than the metals... And you also have to look at density difference which will be critical if you're aiming for thicker (hundreds of micrometer) coatings.... The infiltration process will happen if only matrix melts... Which will happen with laser parameter optimization..... I've come across few papers with laser composite coatings with alumina and SiC fibers.. They may be helpful... I'll share the full texts with you soon when I get back to my office...

Thanks a lot. If I have some other results about the fiber using in the mental coating, I will share them with you. Later, I happen to use SiC fibers. and thank you first for your kind responses.