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Entry  Thu Oct 7 14:39:50 2010, yuta, Update, PSL, measured PMC's laser power-output relation PMCreflect.png
    Reply  Thu Oct 7 15:05:46 2010, Koji, Update, PSL, measured PMC's laser power-output relation 
       Reply  Thu Oct 7 16:34:06 2010, yuta, Update, PSL, measured PMC's laser power-output relation PMCvis.png
          Reply  Thu Oct 14 12:53:29 2010, yuta, Update, PSL, mesured PMC's visibility vs power relation PMCsetup.pngPDcalib.pngPMCreflect2.png
Message ID: 3669     Entry time: Thu Oct 7 15:05:46 2010     In reply to: 3667     Reply to this: 3672
Author: Koji 
Type: Update 
Category: PSL 
Subject: measured PMC's laser power-output relation 

It was a bit difficult to comprehend the result.
Is it good? or bad? Have you seen the thermal effect? or not?

- Put linear lines to show the visibility of the cavity.

- Calibrate the incident power and make another plot to show the visibility (%) vs the incident power (W).

Quote:

(Rana, Yuta)

Motivation:

 We wanted to see thermal effects on the PMC.

What I did yesterday:
 Changed the current of the NPRO from 2A to 0.8A and measured the power of the reflected/transmitted light from the PMC when locked.
 I also measured the power of the reflected light when PMC is not locked (It supposed to be proportional to the output power of the laser).

Result:
 Attached. Hmmmm......
 At several points of the laser current, I could'nt lock the PMC very well. The power of the reflected/transmitted light depend on the offset voltage of the PZT.
 When the laser power was weak(~<0.9A), the power of reflected/transmitted light changed periodically(~ several minutes).

 

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