Differences between revisions 18 and 19
⇤ ← Revision 18 as of 2011-01-15 03:43:58 →
Size: 3161
Editor: KiwamuIzumi
Comment:
← Revision 19 as of 2011-01-15 03:57:25 → ⇥
Size: 3802
Editor: KiwamuIzumi
Comment:
Deletions are marked like this. Additions are marked like this.
Line 2: Line 2:
 . '''1. to stabilize the main PSL laser using the green beat note signal through the actuation on the MC length and use the X arm as a stable reference '''  . '''1. to stabilize the main PSL using the green beat note signal through the actuation on the MC length and use the X arm as a stable reference '''
Line 15: Line 15:
||||||||<tablestyle="width: 80%">'''''Step 1. X arm alignment for IR '''''||
||<:>''''' action ''''' ||<:>''''' description ''''' ||<:> ''''' status ''''' ||<:> ''''' notes '''''||
|| setup DC_PD at an available port || to find a fringe ||<:>attachment:green.png || attachment:help.png put Thorlabs PDA255 at AS ||
|| align BS, ITMX and ETMX ||to have TEM00 flash ||<:>attachment:green.png || put a camera at ETMX_TRANS ||
|| place TRANS_MON_PD || ||<:>attachment:red.png || ||
|| hook it up TRANS_MON to ADC|| {{{ c1iscex }}}||<:>attachment:green.png || ||
|| make a simple mod/demod system || to lock the IR without {{{c1lsc }}}||<:>attachment:red.png ||attachment:help.png ||
|| feeding back the signal to MCL(?) || to lock the IR ||<:>attachment:red.png || attachment:help.png ||
|| add a ''LOCKIN'' module into {{{c1sus}}} and {{{c1iscex}}}|| for A2L ||<:>attachment:red.png || ||
|| A2L for IR || for precise alignment ||<:>attachment:red.png || touch PZT1 and PZT2 ?||
||||||||||
||||||||<tablestyle="width: 80%">'''''Step 2. Re-alignment of green '''''||
||<:>''''' action ''''' ||<:>''''' description ''''' ||<:>''''' status ''''' ||<:> ''''' notes '''''||
|| change beam axis ||steer the mirrors at X end ||<:>attachment:green.png || attachment:help.png ||
|| rearrange the optical setup at X end || if necessary ||<:>attachment:green.png || ||
|| lock the green to X arm || ||<:>attachment:green.png || ||
|| overlap the green beam axis to the IR || using A2L ||<:>attachment:red.png || ||
||||||||||
||||||||<tablestyle="width: 80%">'''''Step 3. Beat note detection '''''||
||<:>''''' action ''''' ||<:>''''' description ''''' ||<:>''''' status ''''' ||<:> ''''' notes '''''||
|| finalize the setup at PSL table || Electronics, cables and etc.,.. ||<:>attachment:orange.png || ||
|| alignment of optics at PSL table || ||<:>attachment:green.png || ||
|| temperature tuning of the lasers || ||<:>attachment:green.png || attachment:help.png ||
||||||||||
||||||||<tablestyle="width: 80%">'''''Step 4. Digital control to stabilize X arm '''''||
||<:>''''' action ''''' ||<:>''''' description ''''' ||<:>''''' status ''''' ||<:>''''' notes '''''||
||connect VCO signal to ADC || hook up it to {{{ c1ioo }}} ||<:>attachment:red.png|| attachment:help.png ||
||simulink model refinement || ||<:>attachment:red.png|| ||
||DAQ setting || ||<:>attachment:red.png || ||
|| feedback to ETMX || ||<:>attachment:red.png|| ||
||medm screen || ||<:>attachment:red.png|| ||		 ||||||||||<tablestyle="width: 80%">'''''Step 1. X arm alignment for IR '''''||
|| ||<:>''''' action ''''' ||<:>''''' description ''''' ||<:> ''''' status ''''' ||<:> ''''' notes '''''||
|| 1-A ||setup DC_PD at an available port || to find a fringe ||<:>attachment:green.png || attachment:help.png put Thorlabs PDA255 at AS ||
|| 1-B || align BS, ITMX and ETMX ||to have TEM00 flash ||<:>attachment:green.png || put a camera at ETMX_TRANS ||
|| 1-C || place TRANS_MON_PD and QPD|| ||<:>attachment:orange.png || ||
|| 1-D || hook it up TRANS_MON and QPD to ADC|| {{{ c1iscex }}}||<:>attachment:green.png || ||
|| 1-E ||make a simple mod/demod system || to lock the IR ||<:>attachment:green.png ||attachment:help.png ||
|| 1-F || feeding back the signal to MCL || to lock the IR ||<:>attachment:green.png || attachment:help.png ||
|| 1-G || add a ''LOCKIN'' module into {{{c1sus}}} and {{{c1iscex}}}|| for A2L ||<:>attachment:red.png || ||
|| 1-H || A2L for IR || for precise alignment ||<:>attachment:red.png || touch PZT1 and PZT2 ?||
||||||||||||
||||||||||<tablestyle="width: 80%">'''''Step 2. Re-alignment of green '''''||
|| ||<:>''''' action ''''' ||<:>''''' description ''''' ||<:>''''' status ''''' ||<:> ''''' notes '''''||
|| 2-A ||change beam axis ||steer the mirrors at X end ||<:>attachment:green.png || attachment:help.png ||
|| 2-B || rearrange the optical setup at X end || if necessary ||<:>attachment:green.png || ||
|| 2-C || lock the green to X arm || ||<:>attachment:green.png || ||
|| 2-D || overlap the green beam axis to the IR || using A2L ||<:>attachment:red.png || ||
||||||||||||
||||||||||<tablestyle="width: 80%">'''''Step 3. Beat note detection '''''||
|| ||<:>''''' action ''''' ||<:>''''' description ''''' ||<:>''''' status ''''' ||<:> ''''' notes '''''||
|| 3-A ||finalize the setup at PSL table || Electronics, cables and etc.,.. ||<:>attachment:orange.png || ||
|| 3-B ||alignment of optics at PSL table || ||<:>attachment:green.png || ||
|| 3-C ||temperature tuning of the lasers || ||<:>attachment:green.png || attachment:help.png ||
||||||||||||
||||||||||<tablestyle="width: 80%">'''''Step 4. Digital control to stabilize the PSL '''''||
|| ||<:>''''' action ''''' ||<:>''''' description ''''' ||<:>''''' status ''''' ||<:>''''' notes '''''||
|| 4-A ||connect VCO signal to ADC || hook up it to {{{ c1ioo }}} ||<:>attachment:red.png|| attachment:help.png ||
|| 4-B || connect some monitor signals to ADC || green refl, trans, ..etc., ||<:>attachment:red.png || ||
|| 4-B ||simulink model refinement || ||<:>attachment:red.png|| ||
|| 4-C || DAQ setting || ||<:>attachment:red.png || ||
|| 4-D || feedback to MC2 length || ||<:>attachment:red.png|| ||
|| 4-E || medm screen || ||<:>attachment:red.png|| ||
||||||||||||
||||||||||<tablestyle="width: 80%">'''''Step 5. measurement '''''||
|| ||<:>''''' action ''''' ||<:>''''' description ''''' ||<:>''''' status ''''' ||<:>''''' notes '''''||
|| 5-A || cavity scan || adding offsets onto MC2 feedback ||<:>attachment:red.png|| ||
|| 5-B || measure the stability of beat note and IR PDH || ||<:>attachment:red.png|| ||

GOALs of this month

  • 1. to stabilize the main PSL using the green beat note signal through the actuation on the MC length and use the X arm as a stable reference

  • 2. to measure the stability of the beat note and compared with the IR PDH signal

  • 3. to answer the question that the green locking is stable enough to hand off the servo to IR

BR

Action Items

Indicators

attachment:green.png complete

attachment:orange.png intermediate state

attachment:red.png nothing happened

attachment:black.png gave up

BR BR

Step 1. X arm alignment for IR

action

description

status

notes

1-A

setup DC_PD at an available port

to find a fringe

attachment:green.png

attachment:help.png put Thorlabs PDA255 at AS

1-B

align BS, ITMX and ETMX

to have TEM00 flash

attachment:green.png

put a camera at ETMX_TRANS

1-C

place TRANS_MON_PD and QPD

attachment:orange.png

1-D

hook it up TRANS_MON and QPD to ADC

 c1iscex 

attachment:green.png

1-E

make a simple mod/demod system

to lock the IR

attachment:green.png

attachment:help.png

1-F

feeding back the signal to MCL

to lock the IR

attachment:green.png

attachment:help.png

1-G

add a LOCKIN module into c1sus and c1iscex

for A2L

attachment:red.png

1-H

A2L for IR

for precise alignment

attachment:red.png

touch PZT1 and PZT2 ?

Step 2. Re-alignment of green

action

description

status

notes

2-A

change beam axis

steer the mirrors at X end

attachment:green.png

attachment:help.png

2-B

rearrange the optical setup at X end

if necessary

attachment:green.png

2-C

lock the green to X arm

attachment:green.png

2-D

overlap the green beam axis to the IR

using A2L

attachment:red.png

Step 3. Beat note detection

action

description

status

notes

3-A

finalize the setup at PSL table

Electronics, cables and etc.,..

attachment:orange.png

3-B

alignment of optics at PSL table

attachment:green.png

3-C

temperature tuning of the lasers

attachment:green.png

attachment:help.png

Step 4. Digital control to stabilize the PSL

action

description

status

notes

4-A

connect VCO signal to ADC

hook up it to  c1ioo 

attachment:red.png

attachment:help.png

4-B

connect some monitor signals to ADC

green refl, trans, ..etc.,

attachment:red.png

4-B

simulink model refinement

attachment:red.png

4-C

DAQ setting

attachment:red.png

4-D

feedback to MC2 length

attachment:red.png

4-E

medm screen

attachment:red.png

Step 5. measurement

action

description

status

notes

5-A

cavity scan

adding offsets onto MC2 feedback

attachment:red.png

5-B

measure the stability of beat note and IR PDH

attachment:red.png

Advanced_Techniques/Green_Locking/January_2011 (last edited 2012-01-03 23:02:44 by localhost)