Abstract
We developed a system that allowed us to unlock and at a later time automatically relock a laser frequency to a medium-finesse Fabry-Perot cavity. The system can work as a chopping wheel or a shutter for a laser field built inside a cavity. The heart of our system is the flywheel circuit for the slower-acting servo loop and the automatic gain control circuit for the faster-acting servo loop. The flywheel circuit stores a correction for a slow frequency drift so that during the unlocked period the slow loop can be safely turned off. The automatic gain control lowers the fast loop gain during a relock process and increases the gain after the lock is secured. The system works reliably at a chopping frequency up to 70 Hz, and relocks well after being unlocked for up to 10 s.
| Original language | English |
|---|---|
| Article number | 026101 |
| Journal | Review of Scientific Instruments |
| Volume | 76 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2005 Jan 25 |
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ASJC Scopus subject areas
- Instrumentation
- Physics and Astronomy (miscellaneous)
Cite this
Automatic system to relock a laser frequency to a Fabry-Perot cavity. / Lee, Seung Koo; Han, Byoung Woong; Cho, Donghyun.
In: Review of Scientific Instruments, Vol. 76, No. 2, 026101, 25.01.2005.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Automatic system to relock a laser frequency to a Fabry-Perot cavity
AU - Lee, Seung Koo
AU - Han, Byoung Woong
AU - Cho, Donghyun
PY - 2005/1/25
Y1 - 2005/1/25
N2 - We developed a system that allowed us to unlock and at a later time automatically relock a laser frequency to a medium-finesse Fabry-Perot cavity. The system can work as a chopping wheel or a shutter for a laser field built inside a cavity. The heart of our system is the flywheel circuit for the slower-acting servo loop and the automatic gain control circuit for the faster-acting servo loop. The flywheel circuit stores a correction for a slow frequency drift so that during the unlocked period the slow loop can be safely turned off. The automatic gain control lowers the fast loop gain during a relock process and increases the gain after the lock is secured. The system works reliably at a chopping frequency up to 70 Hz, and relocks well after being unlocked for up to 10 s.
AB - We developed a system that allowed us to unlock and at a later time automatically relock a laser frequency to a medium-finesse Fabry-Perot cavity. The system can work as a chopping wheel or a shutter for a laser field built inside a cavity. The heart of our system is the flywheel circuit for the slower-acting servo loop and the automatic gain control circuit for the faster-acting servo loop. The flywheel circuit stores a correction for a slow frequency drift so that during the unlocked period the slow loop can be safely turned off. The automatic gain control lowers the fast loop gain during a relock process and increases the gain after the lock is secured. The system works reliably at a chopping frequency up to 70 Hz, and relocks well after being unlocked for up to 10 s.
UR - http://www.scopus.com/inward/record.url?scp=13744257158&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=13744257158&partnerID=8YFLogxK
U2 - 10.1063/1.1841811
DO - 10.1063/1.1841811
M3 - Article
AN - SCOPUS:13744257158
VL - 76
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
SN - 0034-6748
IS - 2
M1 - 026101
ER -