---
APC_amount: 3393,38 EUR
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_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
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
citation:
ama: 'Diorico FR, Zhutov A, Hosten O. Laser-cavity locking utilizing beam ellipticity:
accessing the 10−7 instability scale relative to cavity linewidth.
Optica. 2024;11(1):26-31. doi:10.1364/optica.507451'
apa: 'Diorico, F. R., Zhutov, A., & Hosten, O. (2024). Laser-cavity locking
utilizing beam ellipticity: accessing the 10−7 instability scale relative
to cavity linewidth. Optica. Optica Publishing Group. https://doi.org/10.1364/optica.507451'
chicago: 'Diorico, Fritz R, Artem Zhutov, and Onur Hosten. “Laser-Cavity Locking
Utilizing Beam Ellipticity: Accessing the 10−7 Instability Scale Relative
to Cavity Linewidth.” Optica. Optica Publishing Group, 2024. https://doi.org/10.1364/optica.507451.'
ieee: 'F. R. Diorico, A. Zhutov, and O. Hosten, “Laser-cavity locking utilizing
beam ellipticity: accessing the 10−7 instability scale relative to
cavity linewidth,” Optica, vol. 11, no. 1. Optica Publishing Group, pp.
26–31, 2024.'
ista: 'Diorico FR, Zhutov A, Hosten O. 2024. Laser-cavity locking utilizing beam
ellipticity: accessing the 10−7 instability scale relative to cavity linewidth.
Optica. 11(1), 26–31.'
mla: 'Diorico, Fritz R., et al. “Laser-Cavity Locking Utilizing Beam Ellipticity:
Accessing the 10−7 Instability Scale Relative to Cavity Linewidth.”
Optica, vol. 11, no. 1, Optica Publishing Group, 2024, pp. 26–31, doi:10.1364/optica.507451.'
short: F.R. Diorico, A. Zhutov, O. Hosten, Optica 11 (2024) 26–31.
corr_author: '1'
das_tickbox: '1'
dataavailabilitystatement: Data underlying the results presented in this paper are
not publicly available at this time but may be obtained from the authors upon reasonable
request.
date_created: 2024-01-15T10:25:38Z
date_published: 2024-01-20T00:00:00Z
date_updated: 2026-07-08T08:25:12Z
day: '20'
ddc:
- '530'
department:
- _id: OnHo
doi: 10.1364/optica.507451
external_id:
isi:
- '001202817000004'
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'
isi: 1
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'
researchdata_availability: upon request
scopus_import: '1'
status: public
supplementarymaterial: no
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: 68b8ca59-c5b3-11ee-8790-cd641c68093d
volume: 11
year: '2024'
...
---
OA_place: publisher
OA_type: hybrid
_id: '18226'
abstract:
- lang: eng
text: Spontaneous parametric downconversion (SPDC) in quantum optics is an invaluable
resource for the realization of high-dimensional qudits with spatial modes of
light. One of the main open challenges is how to directly generate a desirable
qudit state in the SPDC process. This problem can be addressed through advanced
computational learning methods; however, due to difficulties in modeling the SPDC
process by a fully differentiable algorithm, progress has been limited. Here,
we overcome these limitations and introduce a physically constrained and differentiable
model, validated against experimental results for shaped pump beams and structured
crystals, capable of learning the relevant interaction parameters in the process.
We avoid any restrictions induced by the stochastic nature of our physical model
and integrate the dynamic equations governing the evolution under the SPDC Hamiltonian.
We solve the inverse problem of designing a nonlinear quantum optical system that
achieves the desired quantum state of downconverted photon pairs. The desired
states are defined using either the second-order correlations between different
spatial modes or by specifying the required density matrix. By learning nonlinear
photonic crystal structures as well as different pump shapes, we successfully
show how to generate maximally entangled states. Furthermore, we simulate all-optical
coherent control over the generated quantum state by actively changing the profile
of the pump beam. Our work can be useful for applications such as novel designs
of high-dimensional quantum key distribution and quantum information processing
protocols. In addition, our method can be readily applied for controlling other
degrees of freedom of light in the SPDC process, such as spectral and temporal
properties, and may even be used in condensed-matter systems having a similar
interaction Hamiltonian.
article_processing_charge: No
article_type: original
author:
- first_name: Eyal
full_name: Rozenberg, Eyal
last_name: Rozenberg
- first_name: Aviv
full_name: Karnieli, Aviv
last_name: Karnieli
- first_name: Ofir
full_name: Yesharim, Ofir
last_name: Yesharim
- first_name: Joshua
full_name: Foley-Comer, Joshua
last_name: Foley-Comer
- first_name: Sivan
full_name: Trajtenberg-Mills, Sivan
last_name: Trajtenberg-Mills
- first_name: Daniel
full_name: Freedman, Daniel
last_name: Freedman
- first_name: Alexander
full_name: Bronstein, Alexander
id: 58f3726e-7cba-11ef-ad8b-e6e8cb3904e6
last_name: Bronstein
orcid: 0000-0001-9699-8730
- first_name: Ady
full_name: Arie, Ady
last_name: Arie
citation:
ama: Rozenberg E, Karnieli A, Yesharim O, et al. Inverse design of spontaneous parametric
downconversion for generation of high-dimensional qudits. Optica. 2022;9(6):602-615.
doi:10.1364/optica.451115
apa: Rozenberg, E., Karnieli, A., Yesharim, O., Foley-Comer, J., Trajtenberg-Mills,
S., Freedman, D., … Arie, A. (2022). Inverse design of spontaneous parametric
downconversion for generation of high-dimensional qudits. Optica. Optica
Publishing Group. https://doi.org/10.1364/optica.451115
chicago: Rozenberg, Eyal, Aviv Karnieli, Ofir Yesharim, Joshua Foley-Comer, Sivan
Trajtenberg-Mills, Daniel Freedman, Alex M. Bronstein, and Ady Arie. “Inverse
Design of Spontaneous Parametric Downconversion for Generation of High-Dimensional
Qudits.” Optica. Optica Publishing Group, 2022. https://doi.org/10.1364/optica.451115.
ieee: E. Rozenberg et al., “Inverse design of spontaneous parametric downconversion
for generation of high-dimensional qudits,” Optica, vol. 9, no. 6. Optica
Publishing Group, pp. 602–615, 2022.
ista: Rozenberg E, Karnieli A, Yesharim O, Foley-Comer J, Trajtenberg-Mills S, Freedman
D, Bronstein AM, Arie A. 2022. Inverse design of spontaneous parametric downconversion
for generation of high-dimensional qudits. Optica. 9(6), 602–615.
mla: Rozenberg, Eyal, et al. “Inverse Design of Spontaneous Parametric Downconversion
for Generation of High-Dimensional Qudits.” Optica, vol. 9, no. 6, Optica
Publishing Group, 2022, pp. 602–15, doi:10.1364/optica.451115.
short: E. Rozenberg, A. Karnieli, O. Yesharim, J. Foley-Comer, S. Trajtenberg-Mills,
D. Freedman, A.M. Bronstein, A. Arie, Optica 9 (2022) 602–615.
date_created: 2024-10-08T12:54:43Z
date_published: 2022-06-06T00:00:00Z
date_updated: 2024-10-14T11:07:29Z
day: '06'
doi: 10.1364/optica.451115
extern: '1'
intvolume: ' 9'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1364/OPTICA.451115
month: '06'
oa: 1
oa_version: Published Version
page: 602-615
publication: Optica
publication_identifier:
issn:
- 2334-2536
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
scopus_import: '1'
status: public
title: Inverse design of spontaneous parametric downconversion for generation of high-dimensional
qudits
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 9
year: '2022'
...
---
_id: '22'
abstract:
- lang: eng
text: Conventional ultra-high sensitivity detectors in the millimeter-wave range
are usually cooled as their own thermal noise at room temperature would mask the
weak received radiation. The need for cryogenic systems increases the cost and
complexity of the instruments, hindering the development of, among others, airborne
and space applications. In this work, the nonlinear parametric upconversion of
millimeter-wave radiation to the optical domain inside high-quality (Q) lithium
niobate whispering-gallery mode (WGM) resonators is proposed for ultra-low noise
detection. We experimentally demonstrate coherent upconversion of millimeter-wave
signals to a 1550 nm telecom carrier, with a photon conversion efficiency surpassing
the state-of-the-art by 2 orders of magnitude. Moreover, a theoretical model shows
that the thermal equilibrium of counterpropagating WGMs is broken by overcoupling
the millimeter-wave WGM, effectively cooling the upconverted mode and allowing
ultra-low noise detection. By theoretically estimating the sensitivity of a correlation
radiometer based on the presented scheme, it is found that room-temperature radiometers
with better sensitivity than state-of-the-art high-electron-mobility transistor
(HEMT)-based radiometers can be designed. This detection paradigm can be used
to develop room-temperature instrumentation for radio astronomy, earth observation,
planetary missions, and imaging systems.
article_processing_charge: No
article_type: original
author:
- first_name: Gabriel
full_name: Botello, Gabriel
last_name: Botello
- first_name: Florian
full_name: Sedlmeir, Florian
last_name: Sedlmeir
- first_name: Alfredo R
full_name: Rueda Sanchez, Alfredo R
id: 3B82B0F8-F248-11E8-B48F-1D18A9856A87
last_name: Rueda Sanchez
orcid: 0000-0001-6249-5860
- first_name: Kerlos
full_name: Abdalmalak, Kerlos
last_name: Abdalmalak
- first_name: Elliott
full_name: Brown, Elliott
last_name: Brown
- first_name: Gerd
full_name: Leuchs, Gerd
last_name: Leuchs
- first_name: Sascha
full_name: Preu, Sascha
last_name: Preu
- first_name: Daniel
full_name: Segovia Vargas, Daniel
last_name: Segovia Vargas
- first_name: Dmitry
full_name: Strekalov, Dmitry
last_name: Strekalov
- first_name: Luis
full_name: Munoz, Luis
last_name: Munoz
- first_name: Harald
full_name: Schwefel, Harald
last_name: Schwefel
citation:
ama: Botello G, Sedlmeir F, Rueda Sanchez AR, et al. Sensitivity limits of millimeter-wave
photonic radiometers based on efficient electro-optic upconverters. Optica.
2018;5(10):1210-1219. doi:10.1364/OPTICA.5.001210
apa: Botello, G., Sedlmeir, F., Rueda Sanchez, A. R., Abdalmalak, K., Brown, E.,
Leuchs, G., … Schwefel, H. (2018). Sensitivity limits of millimeter-wave photonic
radiometers based on efficient electro-optic upconverters. Optica. Optica
Publishing Group. https://doi.org/10.1364/OPTICA.5.001210
chicago: Botello, Gabriel, Florian Sedlmeir, Alfredo R Rueda Sanchez, Kerlos Abdalmalak,
Elliott Brown, Gerd Leuchs, Sascha Preu, et al. “Sensitivity Limits of Millimeter-Wave
Photonic Radiometers Based on Efficient Electro-Optic Upconverters.” Optica.
Optica Publishing Group, 2018. https://doi.org/10.1364/OPTICA.5.001210.
ieee: G. Botello et al., “Sensitivity limits of millimeter-wave photonic
radiometers based on efficient electro-optic upconverters,” Optica, vol.
5, no. 10. Optica Publishing Group, pp. 1210–1219, 2018.
ista: Botello G, Sedlmeir F, Rueda Sanchez AR, Abdalmalak K, Brown E, Leuchs G,
Preu S, Segovia Vargas D, Strekalov D, Munoz L, Schwefel H. 2018. Sensitivity
limits of millimeter-wave photonic radiometers based on efficient electro-optic
upconverters. Optica. 5(10), 1210–1219.
mla: Botello, Gabriel, et al. “Sensitivity Limits of Millimeter-Wave Photonic Radiometers
Based on Efficient Electro-Optic Upconverters.” Optica, vol. 5, no. 10,
Optica Publishing Group, 2018, pp. 1210–19, doi:10.1364/OPTICA.5.001210.
short: G. Botello, F. Sedlmeir, A.R. Rueda Sanchez, K. Abdalmalak, E. Brown, G.
Leuchs, S. Preu, D. Segovia Vargas, D. Strekalov, L. Munoz, H. Schwefel, Optica
5 (2018) 1210–1219.
das_tickbox: '1'
date_created: 2018-12-11T11:44:12Z
date_published: 2018-10-20T00:00:00Z
date_updated: 2026-07-07T06:22:34Z
day: '20'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.1364/OPTICA.5.001210
external_id:
isi:
- '000447853100007'
intvolume: ' 5'
isi: 1
issue: '10'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: 'www.doi.org/10.1364/OPTICA.5.001210 '
month: '10'
oa: 1
oa_version: Published Version
page: 1210-1219
publication: Optica
publication_identifier:
issn:
- 2334-2536
publication_status: published
publisher: Optica Publishing Group
publist_id: '8033'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Sensitivity limits of millimeter-wave photonic radiometers based on efficient
electro-optic upconverters
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 5
year: '2018'
...