I measured the output power of the recently-removed SQZ NPRO laser SN 8552.  The laser settings were found as last set by the SQZ team:

• NPRO Crystal Temp: 31.68 °C
• Diode Current: 2.025 A
• Diode Temp: 20.21 °C

I set the laser settings to those specified in the original data sheet; the set value for the NPRO Crystal temp is slightly different from the actual value, and the power supply reports both numbers so I recorded the actual crystal temp as well.

• NPRO Crystal Temp: 25.10 °C
  • Actual Temp: 25.11 °C
• Diode Current: 2.15 A
• Diode Temp: 20.20 °C

I allowed the laser to warm up for ~5 minutes before taking the first power measurement.  For the measurement I used an Ophir VEGA power meter with an Ophir PD300-3W head.  After the intial reading, the power was slowly increasing, so I waited until it stabilized, noting the power measured a few times over the duration:

• Intial measurement, t0: 0.925 W
• t0 + 10min: 1.015 W
• t0 + 25min: 1.054 W
• t0 + 35min: 1.055 W

The data sheet reports an output power of 1.05 W using the initial settings, so this laser seems fine from an output power standpoint.  I took one last reading of the laser settings to see if things had changed since I started; they had, albeight slightly:

• NPRO Crystal Temp, actual: 25.12 °C
• Diode Current: 2.149 A
• Diode Temp: 20.18 °C

Since the NPRO only had a couple hours to acclimatize to the optics lab environment, I'll let it sit overnight and repeat these measurements tomorrow to make sure everything is unchanged.  As of right now though, the power out of the NPRO matches the original data sheet.