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