Light source for an optical sensor

A light source for at least one optical sensor in combination with a optical sensor transmitting component and an optical sensor receiving component to measure a property of a target matter, said light source comprising at least,

• an interposer having first and second opposing sides and defining at least one alignment aperture extending from said first opposing side to said second opposing side;
• at least one fiber disposed in said at least one alignment aperture, said at least one fiber having a first optical axis, said least one fiber being configured to optically couple to said optical sensor transmitting component to supply said optical sensor transmitting component with at least a portion of coupled light and receive from said optical sensor transmitting component a sensor signal;
• at least one light generating component mounted to said second opposing side and having a second optical axis coincident with said first optical axis, said light generating component configured to emit light, at least a portion of which is coupled with said at least one fiber as said coupled light;
• and
• a feedback component configured to provide feedback to said at least one light generating component such that said at least one light generating component maintains constant optical power.