Increase Laser Power out of fiber optic

roadrunner123

I am working on a project and am combining three laser beams in an effort to make artificial white light out of the end of the fiber. It is currently producing about 1 mw of power. How could I increase the power out of the end of the optical fiber?

Gordianus

Could you please give us more information? Some drawings or schematics?

roadrunner123

Here is a rough sketch. The ellipses the lasers are going through represent prisms. The thicker line where the lasers (green, blue, yellow) meet represents the optical fiber. I thought about placing a lens of some sort between the second prism and the optical fiber to focus the light more but not sure if that will increase the power a significant amount.

Attached Thumbnails

 

Claude Bile

I would try making your red/green/blue beams colinear before focusing them into the end of a fiber. I've found that a good 20x objective works best for standard single-mode telecom fibre; a lower mag objective can be used if the fibre is multimode.

Claude.