PMID- 32486721
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200603
IS  - 1089-7623 (Electronic)
IS  - 0034-6748 (Linking)
VI  - 91
IP  - 5
DP  - 2020 May 1
TI  - Extending the piezoelectric transducer bandwidth of an optical interferometer by 
      suppressing resonance using a high dimensional IIR filter implemented on an FPGA.
PG  - 055102
LID - 10.1063/1.5143477 [doi]
AB  - This paper considers the application of Field Programmable Gate Array 
      (FPGA)-based infinite impulse response (IIR) filtering to increase the usable 
      bandwidth of a piezoelectric transducer used in optical phase locking. We 
      experimentally perform system identification of the interferometer with the 
      cross-correlation method integrated on the controller hardware. Our model is then 
      used to implement an inverse filter designed to suppress the low frequency 
      resonant modes of the piezoelectric transducer. This filter is realized as a 
      24th-order IIR filter on the FPGA, while the total input-output delay is kept at 
      350 ns. The combination of the inverse filter and the piezoelectric transducer 
      works as a nearly flat response position actuator, allowing us to use a 
      proportional-integral (PI) control in order to achieve stability of the 
      closed-loop system with significant improvements over a non-filtered PI control. 
      Finally, because this controller is completely digital, it is straightforward to 
      reproduce. Our control scheme is suitable for many experiments that require 
      highly accurate control of flexible structures.
FAU - Okada, Masanori
AU  - Okada M
AD  - Department of Applied Physics, School of Engineering, The University of Tokyo, 
      7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
FAU - Serikawa, Takahiro
AU  - Serikawa T
AUID- ORCID: 0000000260823186
AD  - Department of Applied Physics, School of Engineering, The University of Tokyo, 
      7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
FAU - Dannatt, James
AU  - Dannatt J
AD  - Research School of Electrical, Energy and Materials Engineering (RSEEME), The 
      Australian National University, Canberra 2600, Australia.
FAU - Kobayashi, Masaya
AU  - Kobayashi M
AD  - Department of Applied Physics, School of Engineering, The University of Tokyo, 
      7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
FAU - Sakaguchi, Atsushi
AU  - Sakaguchi A
AD  - Department of Applied Physics, School of Engineering, The University of Tokyo, 
      7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
FAU - Petersen, Ian
AU  - Petersen I
AD  - Research School of Electrical, Energy and Materials Engineering (RSEEME), The 
      Australian National University, Canberra 2600, Australia.
FAU - Furusawa, Akira
AU  - Furusawa A
AUID- ORCID: 0000000224659999
AD  - Department of Applied Physics, School of Engineering, The University of Tokyo, 
      7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Rev Sci Instrum
JT  - The Review of scientific instruments
JID - 0405571
SB  - IM
EDAT- 2020/06/04 06:00
MHDA- 2020/06/04 06:01
CRDT- 2020/06/04 06:00
PHST- 2020/06/04 06:00 [entrez]
PHST- 2020/06/04 06:00 [pubmed]
PHST- 2020/06/04 06:01 [medline]
AID - 10.1063/1.5143477 [doi]
PST - ppublish
SO  - Rev Sci Instrum. 2020 May 1;91(5):055102. doi: 10.1063/1.5143477.