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Entry  Thu Jun 16 17:51:25 2016, awade, DailyProgress, Laser, Measurement of laser output power vs current (North M126N-1064-700)  
    Reply  Thu Jun 16 18:00:38 2016, awade, DailyProgress, Laser, Measurement of laser output power vs current (North M126N-1064-700)  plot20160616_MeasurmentLaserPowerVsDriverCurrentNorthLaser.epsplot20160616_MeasurmentLaserPowerVsDriverCurrentNorthLaser.m.zip
Message ID: 1644     Entry time: Thu Jun 16 18:00:38 2016     In reply to: 1643
Author: awade 
Type: DailyProgress 
Category: Laser 
Subject: Measurement of laser output power vs current (North M126N-1064-700)  

Here is the data for the power output vs current for the North laser (North M126N-1064-700).  This is the 700 mW model of this range of lasers and not the 100 mW.  The beam profile will therefore have to be remeasured as I'm not sure that is on file.

As the power output was greater than the max for Thorlabs powermeter head (500 mW), I installed a beam splitter to bring the power down. The reflected and transmitted powers were 465.7 mW and 235.4 mW respectivly: the reflection ratio was therefore 0.6642.  Power reported for the north laser are corrected to give the power exiting the laser head. The data and plot  is below.

--

Also, for good measure, here are the settings as displayed on the south laser controller at the nominal 178 mW operating power

ADJ  = 0
DC = 2.08 A
DPM = 0.00V
Neon/off
LDON/off
Display 1
DT = 22.3 C
DTEC = +0.6V
LT = 44.8 C
LTEC = -0.2V
T = +26.4650
Pwr = 68 mW (I think this may just be the controler being way off calibration)

 

-awade Thu Jun 16 18:00:18 2016

Attachment 1: plot20160616_MeasurmentLaserPowerVsDriverCurrentNorthLaser.eps  20 kB  | Hide | Hide all
plot20160616_MeasurmentLaserPowerVsDriverCurrentNorthLaser.eps
Attachment 2: plot20160616_MeasurmentLaserPowerVsDriverCurrentNorthLaser.m.zip  1 kB  Uploaded Fri Sep 15 22:01:14 2017
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