We decided to use the 1064nm beam reflected from the Y1-1037-45-P mirror after the collimation lens following the doubling crystal for coupling into the optical fiber (ref 3843 and 3847 ).
We replaced a beam dump which was blocking this beam with a Y1-1037-45-P mirror and directed the beam into the fiber coupler with another Y1-1037-45-P. The power in this beam was about 1W. This has been stepped down to 10mW by introducing a reflective ND filter of OD=2. The reflected power has been dumped into a blade-stack beam dump.
Steve has ordered the The Visual Fault Locator from Fluke. It is expected to arrive within a day or two.