a plurality of laser diode pumping sources positioned adjacent to both of {TAIL ~ the opposed sides} of and substantially aligned with {HEAD ~ the vertices} of said zig zag optical path, 
a plurality of laser diode pumping sources positioned adjacent to both of { TAIL ~ the opposed sides } of and substantially aligned with { HEAD ~ the vertices } of said zig zag optical path ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH