Diff for "PSL/Frequency_Stabilization_Servo"

Differences between revisions 10 and 15 (spanning 5 versions)

The FSS stabilizes the fluctuations in the laser frequency by comparing it to a quiet Reference_Cavity. The light is picked off just before it goes into the Pre Mode Cleaner, sent through a EOM and the frequency shifting AOM and then into the RC.

The FSS actuates on the NPRO Piezo (called the FAST path) and on a phase correcting Pockels cell (which is faster than the FAST path).

To lock:

Run the FSSAutolock script from the C1PSL_FSS screen (under the yellow ! button).

The FSS has a /SLOW PID servo which offloads the FAST (PZT) path by feeding back to the NPRO's SLOW input. The FAST has a rough calibration of 5 MHz/V while the SLOW is more like 5000 MHz/V. It has a ~0.1 Hz pole and so that's why its called SLOW.

List of FSS Related Electronics Schematics

TT FSS Box (by Schwinberg, Myers, and Savage, based on the Rich Abbott original)
TT ISS Box (by Flavio Nocera w/ lots of prodding from Rana)
VCO Driver Box (R. Abbott)
FSS RFPD (old LSC kind by Dale Ouimette)
Temperature Control Box (Rich Abbott then changes by Hugh Radkins and Paul Schwinberg) D980400
Variac on the HEPA (D. Busby's handiwork)

Test Results for The New TTFSS
Test Plan(Cervantes, Schwinberg, Savage)
Test Results, box#05 , box#06,box#07(Chalermsongsak, Arai)

See also PSL.

References

P960008-10: Improved Multistage Wide Band Laser Frequency Stabilization, by Seiji Kawamura, Alex Abramovici, Mike Zucker (1996).

-  ⇤ ← Revision 10 as of 2010-10-04 12:58:23 → 
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-The FSS stabilizes the fluctuations in the laser frequency by comparing it to a quiet [[Reference Cavity]]. The light is picked off just before it goes into the [[Pre Mode Cleaner]], sent through a EOM and the frequency shifting AOM and then into the RC.
+The FSS stabilizes the fluctuations in the laser frequency by comparing it to a quiet [[Reference_Cavity]]. The light is picked off just before it goes into the [[Pre Mode Cleaner]], sent through a EOM and the frequency shifting AOM and then into the RC.
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-To lock:
+ . To lock:
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+----
 . The FSS has a [[PSL/Frequency Stabilization Servo/SLOW PID servo|/SLOW PID servo]] which offloads the FAST (PZT) path by feeding back to the NPRO's SLOW input. The FAST has a rough calibration of 5 MHz/V while the SLOW is more like 5000 MHz/V. It has a ~0.1 Hz pole and so that's why its called ''SLOW''.
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-The FSS has a [[/SLOW PID servo]] which offloads the FAST (PZT) path by feeding back to the NPRO's SLOW input. The FAST has a rough calibration of 5 MHz/V while the SLOW is more like 5000 MHz/V. It has a ~0.1 Hz pole and so that's why its called ''SLOW''.
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- * [http://www.ligo.caltech.edu/docs/D/D040105-A/D040105-A.pdf TT FSS Box] (by Schwinberg, Myers, and Savage, based on the Rich Abbott original)
+ * [[http://www.ligo.caltech.edu/docs/D/D040105-A/D040105-A.pdf|TT FSS Box]] (by Schwinberg, Myers, and Savage, based on the Rich Abbott original)
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- * [http://www.ligo.caltech.edu/docs/D/D980401-B1.pdf VCO Driver Box] (R. Abbott)
+ * [[http://www.ligo.caltech.edu/docs/D/D980401-B1.pdf|VCO Driver Box]] (R. Abbott)
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+ * Temperature Control Box (Rich Abbott then changes by Hugh Radkins and Paul Schwinberg) [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?.submit=Number&docid=D980400&version=|D980400]]
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-See also [[PSL]].
+ . '''Test Results for The New TTFSS'''
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-attachment:C1PSL_FSS.png
+ * [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=20783|Test Plan]](Cervantes, Schwinberg, Savage)   

 * Test Results,  [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=22509|box#05]] , [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=22273|box#06]],[[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=22356|box#07]](Chalermsongsak, Arai)   

----
 See also [[PSL]].

{{attachment:C1PSL_FSS.png}}
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- * [http://www.ligo.caltech.edu/docs/P/P960008-10.pdf P960008-10]: Improved Multistage Wide Band Laser Frequency Stabilization, by Seiji Kawamura, Alex Abramovici, Mike Zucker (1996).
+ * [[http://www.ligo.caltech.edu/docs/P/P960008-10.pdf|P960008-10]]: Improved Multistage Wide Band Laser Frequency Stabilization, by Seiji Kawamura, Alex Abramovici, Mike Zucker (1996).