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Instrumentation Division
INSTITUTO DE ASTROFÍSICA DE CANARIAS
Noelia MartínezInstituto de Astrofísica de Canarias
Simulating the wavefront measurement in
Free Space Optical Communications
And the use of Laser Guide Stars for
FSOC
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias 2
CONTENTS
1. Free Space Optical communications in
turbulence medium
2. Simulations description
3. Simulations results
4. Future work
Acknowledgement
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias 3
CONTENTS
1. Free Space Optical communications in
turbulence medium
2. Simulations description
3. Simulations results
4. Future work
Acknowledgement
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
1. FSOC in turbulence medium
4
Simulations
descriptionSimulations
results
Free Space Optical Communications
(FSOC)Ground – Satellite
Satellite – GroundSatellite - Satellite
Copyright AOES MedialabESA 2002 Copyright ESA-J.Huart
Future
work
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
1. FSOC in turbulence medium
5
Free Space Optical Communications
(FSOC)Ground – Satellite
Satellite – Ground
Copyright AOES MedialabESA 2002
Toyoshima et al, 2011
Simulations
descriptionSimulations
results
Future
work
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
1. FSOC in turbulence medium
6
Free Space Optical Communications
(FSOC)Ground – Satellite
Satellite – Ground
Copyright AOES MedialabESA 2002
Simulations
descriptionSimulations
results
Future
work
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
1. FSOC in turbulence medium
7
Free Space Optical Communications
(FSOC)Ground – Satellite
Satellite – Ground
Copyright AOES MedialabESA 2002
Toyoshima et al, 2011
Simulations
descriptionSimulations
results
Future
work
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
1. FSOC in turbulence medium
8
Atmospheric
turbulence effects
on optical links:
• Downlink effects:o Beam
broadening
o Scintillation
• Uplink effects:o Beam wander
o Fluctuations in
the angle-of-
arrival
Simulations
descriptionSimulations
results
Future
work
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
1. FSOC in turbulence medium
9
Measuring atmospheric turbulence on optical links
Θ
Could the uplink be corrected
by measurement the downlink
wavefront?
Simulations
descriptionSimulations
results
Future
work
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias 10
CONTENTS
1. Free Space Optical communications in
turbulence medium
2. Simulations description
3. Simulations results
4. Future work
Acknowledgement
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
2. Simulations description
11
Analysing the
isoplanatic patch
1. Case study definition
2. Real available data
3. Simulation workflow
Closing the
AO loop
1. Case study definition
2. Real available data
3. Simulation workflow
Object- Oriented Matlab Adaptive Optics Toolbox
(OOMAO) Conan and Correia, 2014
Simulations
results
Future
work
FSOC in
turbulence medium
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
2. Simulations description
12
Analysing the
isoplanatic patch
1. Case study definition
2. Real available data
3. Simulation workflow
Simulations
results
Future
work
FSOC in
turbulence medium
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
2. Simulations description
13
Analysing the
isoplanatic patch
1. Case study definition
2. Real available data
3. Simulation workflow
Observatorio del Teide
– Atmospheric Profiles –Night data
Simulations
results
Future
work
FSOC in
turbulence medium
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
2. Simulations description
14
Analysing the
isoplanatic patch
1. Case study definition
2. Real available data
3. Simulation workflow
Observatorio del Teide
– Atmospheric Profiles –Day data
Simulations
results
Future
work
FSOC in
turbulence medium
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
2. Simulations description
15
Analysing the
isoplanatic patch
1. Case study definition
2. Real available data
3. Simulation workflow
Optical Ground Station
– Optical Parameters –
Telescope diameter = 1m
Central obstruction = 20%
Laser Wavelength = 1200 nm
Simulations
results
Future
work
FSOC in
turbulence medium
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
2. Simulations description
16
Analysing the
isoplanatic patch
1. Case study definition
2. Real available data
3. Simulation workflow
Simulations
results
Future
work
FSOC in
turbulence medium
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
2. Simulations description
17
Closing the
AO loop
1. Case study definition
2. Real available data
3. Simulation workflow
Case Study 1: Correcting the uplink with the
downlink
Simulations
results
Future
work
FSOC in
turbulence medium
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
2. Simulations description
18
Closing the
AO loop
1. Case study definition
2. Real available data
3. Simulation workflow
Case Study 2: Correcting the uplink with a
Laser Guide Star
Simulations
results
Future
work
FSOC in
turbulence medium
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
2. Simulations description
19
Closing the
AO loop
1. Case study definition
2. Real available data
3. Simulation workflow
Observatorio del Teide
– Atmospheric Profiles –Night data
Simulations
results
Future
work
FSOC in
turbulence medium
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
2. Simulations description
20
Closing the
AO loop
1. Case study definition
2. Real available data
3. Simulation workflow
Observatorio del Teide
– Atmospheric Profiles –Day data
Simulations
results
Future
work
FSOC in
turbulence medium
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
2. Simulations description
21
Closing the
AO loop
1. Case study definition
2. Real available data
3. Simulation workflow
Optical Ground Station
– Optical Parameters –
Telescope diameter = 1m
Central obstruction = 20%
Laser Wavelength = 1200 nm
Simulations
results
Future
work
FSOC in
turbulence medium
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
Simulations
results
Future
work
FSOC in
turbulence medium
2. Simulations description
22
Closing the
AO loop
1. Case study definition
2. Real available data
3. Simulation workflow
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias 23
CONTENTS
1. Free Space Optical communications in
turbulence medium
2. Simulations description
3. Simulations results
4. Future work
Acknowledgement
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
3. Simulations results
24
Analysing the
isoplanatic patch
Closing the
AO loop
Future
work
FSOC in
turbulence mediumSimulations
description
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
Future
work
FSOC in
turbulence mediumSimulations
description
3. Simulations results
25
Analysing the
isoplanatic patch
Oct-Nov-Dec-Feb
Mar-Apr-May
Night dataJun-Jul-Aug
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
Future
work
FSOC in
turbulence mediumSimulations
description
3. Simulations results
26
Analysing the
isoplanatic patchDay data
Jun-Jul-AugSep-Oct-Nov
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
Future
work
FSOC in
turbulence mediumSimulations
description
3. Simulations results
27
Analysing the
isoplanatic patch
Closing the
AO loopCase Study 1: Correcting the uplink with
the downlinkTIP-TILT
ANALYSIS
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
Future
work
FSOC in
turbulence mediumSimulations
description
3. Simulations results
28
Analysing the
isoplanatic patch
Closing the
AO loopCase Study 1: Correcting the uplink with
the downlinkTIP-TILT
ANALYSIS
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
Future
work
FSOC in
turbulence mediumSimulations
description
3. Simulations results
29
Analysing the
isoplanatic patch
Closing the
AO loopCase Study 1: Correcting the uplink with
the downlinkPHASE VARIANCE
ANALYSIS Case Study 2: Correcting the uplink with
a Laser Guide Star
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
Future
work
FSOC in
turbulence mediumSimulations
description
3. Simulations results
30
Analysing the
isoplanatic patch
Closing the
AO loop
Closing the
AO loopCase Study 1: Correcting the uplink with
the downlinkPHASE VARIANCE
ANALYSIS Case Study 2: Correcting the uplink with
a Laser Guide Star
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias 31
CONTENTS
1. Free Space Optical communications in
turbulence medium
2. Simulations description
3. Simulations results
4. Future work
Acknowledgement
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias
4. Future work
32
FSOC in
turbulence mediumSimulations
description
Simulations
results
- Ongoing activity within the Technology Research
Programme (TRP) with the European Space
Agency.
- Further simulations regarding phase variance at
the uplink.
- Lab testing and telescope testing.
- IACTEC – microsatellites programme.
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias 33
CONTENTS
1. Free Space Optical communications in
turbulence medium
2. Simulations description
3. Simulations results
4. Future work
Acknowledgement
Instrumentation DivisionNoelia MartínezInstituto de Astrofísica de Canarias 34
Acknowledgement
Thanks to:
- Carlos Correia and colleagues
(OOMAO toolbox).
- Zoran Sodnik, from ESA.
- Domenico Bonaccini, from ESO
(LGS Campaign)
Copyright Victor R. Ruiz
Instrumentation Division
INSTITUTO DE ASTROFÍSICA DE CANARIAS
Noelia MartínezInstituto de Astrofísica de Canarias
Simulating the wavefront measurement in
Free Space Optical Communications
And the use of Laser Guide Stars for
FSOC
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