---
_id: '14802'
abstract:
- lang: eng
text: Frequency-stable lasers form the back bone of precision measurements in science
and technology. Such lasers typically attain their stability through frequency
locking to reference cavities. State-of-the-art locking performances to date had
been achieved using frequency modulation based methods, complemented with active
drift cancellation systems. We demonstrate an all passive, modulation-free laser-cavity
locking technique (squash locking) that utilizes changes in spatial beam ellipticity
for error signal generation, and a coherent polarization post-selection for noise
resilience. By comparing two identically built proof-of-principle systems, we
show a frequency locking instability of 5×10−7 relative to
the cavity linewidth at 10 s averaging. The results surpass the demonstrated performances
of methods engineered over the last five decades, potentially enabling an advancement
in the precision control of lasers, while creating avenues for bridging the performance
gaps between industrial grade lasers with scientific ones due to the afforded
simplicity and scalability.
acknowledgement: We thank Rishabh Sahu and Sebastian Wald for technical contributions
to the experiment. Funding by Institute of Science and Technology Austria.
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Fritz R
full_name: Diorico, Fritz R
id: 2E054C4C-F248-11E8-B48F-1D18A9856A87
last_name: Diorico
orcid: 0000-0002-4947-8924
- first_name: Artem
full_name: Zhutov, Artem
id: 0f02ed6a-b514-11ee-b891-8379c5f19cb7
last_name: Zhutov
- first_name: Onur
full_name: Hosten, Onur
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
date_created: 2024-01-15T10:25:38Z
date_published: 2024-01-20T00:00:00Z
date_updated: 2024-08-19T09:52:20Z
day: '20'
ddc:
- '530'
department:
- _id: OnHo
doi: 10.1364/optica.507451
external_id:
arxiv:
- '2202.13212'
file:
- access_level: open_access
checksum: eb99ca7d0fe73e22f121875175546ed7
content_type: application/pdf
creator: dernst
date_created: 2024-01-17T08:53:16Z
date_updated: 2024-01-17T08:53:16Z
file_id: '14824'
file_name: 2023_Optica_Diorico.pdf
file_size: 4558986
relation: main_file
success: 1
file_date_updated: 2024-01-17T08:53:16Z
has_accepted_license: '1'
intvolume: ' 11'
issue: '1'
keyword:
- Atomic and Molecular Physics
- and Optics
- Electronic
- Optical and Magnetic Materials
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
page: 26-31
publication: Optica
publication_identifier:
issn:
- 2334-2536
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
status: public
title: 'Laser-cavity locking utilizing beam ellipticity: accessing the 10−7
instability scale relative to cavity linewidth'
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 11
year: '2024'
...
---
_id: '14980'
abstract:
- lang: eng
text: Precision sensing and manipulation of milligram-scale mechanical oscillators
has attracted growing interest in the fields of table-top explorations of gravity
and tests of quantum mechanics at macroscopic scales. Torsional oscillators present
an opportunity in this regard due to their remarked isolation from environmental
noise. For torsional motion, an effective employment of optical cavities to enhance
optomechanical interactions—as already established for linear oscillators—so far
faced certain challenges. Here, we propose a concept for sensing and manipulating
torsional motion, where exclusively the torsional rotations of a pendulum are
mapped onto the path length of a single two-mirror optical cavity. The concept
inherently alleviates many limitations of previous approaches. A proof-of-principle
experiment is conducted with a rigidly controlled pendulum to explore the sensing
aspects of the concept and to identify practical limitations in a potential state-of-the
art setup. Based on this study, we anticipate development of precision torque
sensors utilizing torsional pendulums that can support sensitivities below 10−19Nm/√Hz,
while the motion of the pendulums are dominated by quantum radiation pressure
noise at sub-microwatts of incoming laser power. These developments will provide
horizons for experiments at the interface of quantum mechanics and gravity.
acknowledgement: "We thank Pere Rosselló for his contributions to the initial modeling
of the presented sensing technique. This work was supported by Institute of Science
and Technology Austria, and\r\nthe European Research Council under Grant No. 101087907
(ERC CoG QuHAMP)."
article_number: '013141'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Sofya
full_name: Agafonova, Sofya
id: 09501ff6-dca7-11ea-a8ae-b3e0b9166e80
last_name: Agafonova
orcid: 0000-0003-0582-2946
- first_name: Umang
full_name: Mishra, Umang
id: 4328fa4c-f128-11eb-9611-c107b0fe4d51
last_name: Mishra
- first_name: Fritz R
full_name: Diorico, Fritz R
id: 2E054C4C-F248-11E8-B48F-1D18A9856A87
last_name: Diorico
orcid: 0000-0002-4947-8924
- first_name: Onur
full_name: Hosten, Onur
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
citation:
ama: Agafonova S, Mishra U, Diorico FR, Hosten O. Zigzag optical cavity for sensing
and controlling torsional motion. Physical Review Research. 2024;6(1).
doi:10.1103/physrevresearch.6.013141
apa: Agafonova, S., Mishra, U., Diorico, F. R., & Hosten, O. (2024). Zigzag
optical cavity for sensing and controlling torsional motion. Physical Review
Research. American Physical Society. https://doi.org/10.1103/physrevresearch.6.013141
chicago: Agafonova, Sofya, Umang Mishra, Fritz R Diorico, and Onur Hosten. “Zigzag
Optical Cavity for Sensing and Controlling Torsional Motion.” Physical Review
Research. American Physical Society, 2024. https://doi.org/10.1103/physrevresearch.6.013141.
ieee: S. Agafonova, U. Mishra, F. R. Diorico, and O. Hosten, “Zigzag optical cavity
for sensing and controlling torsional motion,” Physical Review Research,
vol. 6, no. 1. American Physical Society, 2024.
ista: Agafonova S, Mishra U, Diorico FR, Hosten O. 2024. Zigzag optical cavity for
sensing and controlling torsional motion. Physical Review Research. 6(1), 013141.
mla: Agafonova, Sofya, et al. “Zigzag Optical Cavity for Sensing and Controlling
Torsional Motion.” Physical Review Research, vol. 6, no. 1, 013141, American
Physical Society, 2024, doi:10.1103/physrevresearch.6.013141.
short: S. Agafonova, U. Mishra, F.R. Diorico, O. Hosten, Physical Review Research
6 (2024).
date_created: 2024-02-12T11:42:18Z
date_published: 2024-02-05T00:00:00Z
date_updated: 2024-02-12T11:49:06Z
day: '05'
ddc:
- '530'
department:
- _id: OnHo
doi: 10.1103/physrevresearch.6.013141
external_id:
arxiv:
- '2306.12804'
file:
- access_level: open_access
checksum: 3a39ebffb24c1cc1dd0b547a726dc52d
content_type: application/pdf
creator: dernst
date_created: 2024-02-12T11:46:50Z
date_updated: 2024-02-12T11:46:50Z
file_id: '14981'
file_name: 2024_PhysicalRevResearch_Agafonova.pdf
file_size: 1437167
relation: main_file
success: 1
file_date_updated: 2024-02-12T11:46:50Z
has_accepted_license: '1'
intvolume: ' 6'
issue: '1'
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
project:
- _id: bdb2a702-d553-11ed-ba76-f12e3e5a3bc6
grant_number: '101087907'
name: 'A quantum hybrid of atoms and milligram-scale pendulums: towards gravitational
quantum mechanics'
publication: Physical Review Research
publication_identifier:
eissn:
- 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
status: public
title: Zigzag optical cavity for sensing and controlling torsional motion
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 6
year: '2024'
...
---
_id: '14749'
abstract:
- lang: eng
text: We unveil a powerful method for the stabilization of laser injection locking
based on sensing variations in the output beam ellipticity of an optically seeded
laser. The effect arises due to an interference between the seeding beam and the
injected laser output. We demonstrate the method for a commercial semiconductor
laser without the need for any internal changes to the readily operational injection
locked laser system that was used. The method can also be used to increase the
mode-hop free tuning range of lasers, and has the potential to fill a void in
the low-noise laser industry.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Umang
full_name: Mishra, Umang
id: 4328fa4c-f128-11eb-9611-c107b0fe4d51
last_name: Mishra
- first_name: Vyacheslav
full_name: Li, Vyacheslav
id: 3A4FAA92-F248-11E8-B48F-1D18A9856A87
last_name: Li
- first_name: Sebastian
full_name: Wald, Sebastian
id: 133F200A-B015-11E9-AD41-0EDAE5697425
last_name: Wald
- first_name: Sofya
full_name: Agafonova, Sofya
id: 09501ff6-dca7-11ea-a8ae-b3e0b9166e80
last_name: Agafonova
orcid: 0000-0003-0582-2946
- first_name: Fritz R
full_name: Diorico, Fritz R
id: 2E054C4C-F248-11E8-B48F-1D18A9856A87
last_name: Diorico
- first_name: Onur
full_name: Hosten, Onur
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
citation:
ama: Mishra U, Li V, Wald S, Agafonova S, Diorico FR, Hosten O. Monitoring and active
stabilization of laser injection locking using beam ellipticity. Optics Letters.
2023;48(15):3973-3976. doi:10.1364/ol.495553
apa: Mishra, U., Li, V., Wald, S., Agafonova, S., Diorico, F. R., & Hosten,
O. (2023). Monitoring and active stabilization of laser injection locking using
beam ellipticity. Optics Letters. Optica Publishing Group. https://doi.org/10.1364/ol.495553
chicago: Mishra, Umang, Vyacheslav Li, Sebastian Wald, Sofya Agafonova, Fritz R
Diorico, and Onur Hosten. “Monitoring and Active Stabilization of Laser Injection
Locking Using Beam Ellipticity.” Optics Letters. Optica Publishing Group,
2023. https://doi.org/10.1364/ol.495553.
ieee: U. Mishra, V. Li, S. Wald, S. Agafonova, F. R. Diorico, and O. Hosten, “Monitoring
and active stabilization of laser injection locking using beam ellipticity,” Optics
Letters, vol. 48, no. 15. Optica Publishing Group, pp. 3973–3976, 2023.
ista: Mishra U, Li V, Wald S, Agafonova S, Diorico FR, Hosten O. 2023. Monitoring
and active stabilization of laser injection locking using beam ellipticity. Optics
Letters. 48(15), 3973–3976.
mla: Mishra, Umang, et al. “Monitoring and Active Stabilization of Laser Injection
Locking Using Beam Ellipticity.” Optics Letters, vol. 48, no. 15, Optica
Publishing Group, 2023, pp. 3973–76, doi:10.1364/ol.495553.
short: U. Mishra, V. Li, S. Wald, S. Agafonova, F.R. Diorico, O. Hosten, Optics
Letters 48 (2023) 3973–3976.
date_created: 2024-01-08T13:01:46Z
date_published: 2023-07-21T00:00:00Z
date_updated: 2024-01-09T08:09:32Z
day: '21'
department:
- _id: OnHo
doi: 10.1364/ol.495553
external_id:
arxiv:
- '2212.01266'
intvolume: ' 48'
issue: '15'
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
month: '07'
oa_version: Preprint
page: 3973-3976
publication: Optics Letters
publication_identifier:
eissn:
- 1539-4794
issn:
- 0146-9592
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
scopus_import: '1'
status: public
title: Monitoring and active stabilization of laser injection locking using beam ellipticity
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 48
year: '2023'
...
---
_id: '14759'
abstract:
- lang: eng
text: "Proper operation of electro-optic I/Q modulators relies on precise adjustment
and control of the relative phase biases between the modulator’s internal interferometer
arms. We present an all-analog phase bias locking scheme where error signals are
obtained from the beat between the optical carrier and optical tones generated
by an auxiliary 2 MHz \U0001D445\U0001D439 tone to lock the phases of all three
involved interferometers for operation up to 10 GHz. With the developed method,
we demonstrate an I/Q modulator in carrier-suppressed single-sideband mode, where
the suppressed carrier and sideband are locked at optical power levels <−27dB\r\n
relative to the transmitted sideband. We describe a simple analytical model for
calculating the error signals and detail the implementation of the electronic
circuitry for the implementation of the method."
acknowledgement: We thank Jakob Vorlaufer for technical contributions and Vyacheslav
Li and Sofia Agafonova for comments on the manuscript.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Sebastian
full_name: Wald, Sebastian
id: 133F200A-B015-11E9-AD41-0EDAE5697425
last_name: Wald
orcid: 0000-0002-5869-1604
- first_name: Fritz R
full_name: Diorico, Fritz R
id: 2E054C4C-F248-11E8-B48F-1D18A9856A87
last_name: Diorico
orcid: 0000-0002-4947-8924
- first_name: Onur
full_name: Hosten, Onur
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
citation:
ama: Wald S, Diorico FR, Hosten O. Analog stabilization of an electro-optic I/Q
modulator with an auxiliary modulation tone. Applied Optics. 2023;62(1):1-7.
doi:10.1364/ao.474118
apa: Wald, S., Diorico, F. R., & Hosten, O. (2023). Analog stabilization of
an electro-optic I/Q modulator with an auxiliary modulation tone. Applied Optics.
Optica Publishing Group. https://doi.org/10.1364/ao.474118
chicago: Wald, Sebastian, Fritz R Diorico, and Onur Hosten. “Analog Stabilization
of an Electro-Optic I/Q Modulator with an Auxiliary Modulation Tone.” Applied
Optics. Optica Publishing Group, 2023. https://doi.org/10.1364/ao.474118.
ieee: S. Wald, F. R. Diorico, and O. Hosten, “Analog stabilization of an electro-optic
I/Q modulator with an auxiliary modulation tone,” Applied Optics, vol.
62, no. 1. Optica Publishing Group, pp. 1–7, 2023.
ista: Wald S, Diorico FR, Hosten O. 2023. Analog stabilization of an electro-optic
I/Q modulator with an auxiliary modulation tone. Applied Optics. 62(1), 1–7.
mla: Wald, Sebastian, et al. “Analog Stabilization of an Electro-Optic I/Q Modulator
with an Auxiliary Modulation Tone.” Applied Optics, vol. 62, no. 1, Optica
Publishing Group, 2023, pp. 1–7, doi:10.1364/ao.474118.
short: S. Wald, F.R. Diorico, O. Hosten, Applied Optics 62 (2023) 1–7.
date_created: 2024-01-08T13:19:14Z
date_published: 2023-01-01T00:00:00Z
date_updated: 2024-01-09T10:10:34Z
day: '01'
department:
- _id: OnHo
doi: 10.1364/ao.474118
external_id:
arxiv:
- '2208.11591'
intvolume: ' 62'
issue: '1'
keyword:
- Atomic and Molecular Physics
- and Optics
- Engineering (miscellaneous)
- Electrical and Electronic Engineering
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2208.11591
month: '01'
oa: 1
oa_version: Preprint
page: 1-7
publication: Applied Optics
publication_identifier:
eissn:
- 2155-3165
issn:
- 1559-128X
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
scopus_import: '1'
status: public
title: Analog stabilization of an electro-optic I/Q modulator with an auxiliary modulation
tone
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 62
year: '2023'
...
---
_id: '11438'
abstract:
- lang: eng
text: Lasers with well-controlled relative frequencies are indispensable for many
applications in science and technology. We present a frequency-offset locking
method for lasers based on beat-frequency discrimination utilizing hybrid electronic
LC filters. The method is specifically designed for decoupling the tightness of
the lock from the broadness of its capture range. The presented demonstration
locks two free-running diode lasers at 780 nm with a 5.5-GHz offset. It displays
an offset frequency instability below 55 Hz for time scales in excess of 1000
s and a minimum of 12 Hz at 10-s averaging. The performance is complemented with
a 190-MHz lock-capture range, a tuning range of up to 1 GHz, and a frequency ramp
agility of 200kHz/μs.
acknowledgement: This work was supported by IST Austria. The authors thank Yueheng
Shi for technical contributions.
article_number: '054031'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Vyacheslav
full_name: Li, Vyacheslav
id: 3A4FAA92-F248-11E8-B48F-1D18A9856A87
last_name: Li
- first_name: Fritz R
full_name: Diorico, Fritz R
id: 2E054C4C-F248-11E8-B48F-1D18A9856A87
last_name: Diorico
- first_name: Onur
full_name: Hosten, Onur
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
citation:
ama: Li V, Diorico FR, Hosten O. Laser frequency-offset locking at 10-Hz-level instability
using hybrid electronic filters. Physical Review Applied. 2022;17(5). doi:10.1103/physrevapplied.17.054031
apa: Li, V., Diorico, F. R., & Hosten, O. (2022). Laser frequency-offset locking
at 10-Hz-level instability using hybrid electronic filters. Physical Review
Applied. American Physical Society. https://doi.org/10.1103/physrevapplied.17.054031
chicago: Li, Vyacheslav, Fritz R Diorico, and Onur Hosten. “Laser Frequency-Offset
Locking at 10-Hz-Level Instability Using Hybrid Electronic Filters.” Physical
Review Applied. American Physical Society, 2022. https://doi.org/10.1103/physrevapplied.17.054031.
ieee: V. Li, F. R. Diorico, and O. Hosten, “Laser frequency-offset locking at 10-Hz-level
instability using hybrid electronic filters,” Physical Review Applied,
vol. 17, no. 5. American Physical Society, 2022.
ista: Li V, Diorico FR, Hosten O. 2022. Laser frequency-offset locking at 10-Hz-level
instability using hybrid electronic filters. Physical Review Applied. 17(5), 054031.
mla: Li, Vyacheslav, et al. “Laser Frequency-Offset Locking at 10-Hz-Level Instability
Using Hybrid Electronic Filters.” Physical Review Applied, vol. 17, no.
5, 054031, American Physical Society, 2022, doi:10.1103/physrevapplied.17.054031.
short: V. Li, F.R. Diorico, O. Hosten, Physical Review Applied 17 (2022).
date_created: 2022-06-07T08:07:59Z
date_published: 2022-05-19T00:00:00Z
date_updated: 2023-08-03T07:18:34Z
day: '19'
department:
- _id: GradSch
- _id: OnHo
doi: 10.1103/physrevapplied.17.054031
external_id:
arxiv:
- '2111.13194'
isi:
- '000880670300001'
intvolume: ' 17'
isi: 1
issue: '5'
keyword:
- General Physics and Astronomy
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.2111.13194'
month: '05'
oa: 1
oa_version: Preprint
publication: Physical Review Applied
publication_identifier:
issn:
- 2331-7019
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
status: public
title: Laser frequency-offset locking at 10-Hz-level instability using hybrid electronic
filters
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 17
year: '2022'
...