{HEAD ~ The resonator} for a laser 1 further comprising turning optics affixed to the optics plate and configured to intercept {TAIL ~ the fourth reflected beam} 
{ HEAD ~ The resonator } for a laser 1 further comprising turning optics affixed to the optics plate and configured to intercept { TAIL ~ the fourth reflected beam }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL