For troubleshooting, the proper laser driver (found beneath the AG network analyzer) was connected.
The current ~1mA was provided and the driver detected the "open circuit", which means the laser diode was busted.
https://dcc.ligo.org/LIGO-T060240
The laser diode in the parts list is: "GTRAN GaAs Strained QW Laser Diode, Part # LD-1060". |