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Entry   Fundamental Mode TEM00, posted by Manar Amer at Optical room about lasers and optics 20220524_SBox_Setup.png00mode_CW_piezo_drive.bmp00mode_11mode.bmp
    Reply   Fundamental Mode TEM00, posted by Manar Amer at Optical room about lasers and optics beamviwer_transmission_at_M3.bmpbeamviwer_transmission_at_M4.bmp
       Reply   Fundamental Mode TEM00, posted by Manar Amer at Optical room about lasers and optics 20220530_00_Mode.bmp00_Mode_Beam_Transmitted_Position_drift_due_to_temperature.bmp
          Reply   Fundamental Mode TEM00, posted by Manar Amer at Optical room about lasers and optics 
Message ID: 94     Entry time: Wed Jun 8 10:58:15 2022     In reply to: 92     Reply to this: 102
 Author: Manar Amer 
 Status: Fixed 
 Type: report 
 Category: lasers and optics 
 Location: Optical room 
 Title: Fundamental Mode TEM00 

Images of the Transmitted beam at M2 mirror at different days. 

The first one was from last week, the second from yesterday.

There is misalignment (drift due to temperature) from the position where the beam was initially. ( reference taken between centers of mode and direct injected beam) 

it is most clear in the vertical position.

Manar Amer wrote:

Adding images from the transmission after the spherical mirrors M3 and M4 window for a resonating mode inside the cavity.

There appears to be some misalignment from the center of the mirror ???

 

Manar Amer wrote:

The current setup for the SBox has a beam viewer and 2 photodiodes placed at reflection and transmission.

The CW laser piezoelectric crystal was driven using the lase lock system to observe the 00 mode.

Mode Observed and has no reflection (from what was previously seen)

higher order modes are resonating with 00 mode , example 11 mode (shown in image attached)

the coupling is yet to be seen and measured.

 

 

Attachment 1: 20220530_00_Mode.bmp  1.953 MB
Attachment 2: 00_Mode_Beam_Transmitted_Position_drift_due_to_temperature.bmp  1.945 MB
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