document title / titre du document TRP W ORK PLAN ... - emits - ESA

TRP Work Plan 2005-2007
Description of Activities
TEC-SB/7935/dc
12/Feb/09
TRP Reference:
Title:
T203-09SC
Wavefront tilt sensor
In this activity the wavefront tilt sensor shall be designed, breadboarded and tested. The testing shall be performed in a
representative environment. Optimum wavelengths and operating points shall be specified.
In the DARWIN mission a telescope pointing error will cause a tilt of the interferometer’s input beam, which translates into an
amplitude error after wavefront filtering. The interferometer’s nulling performance is proportional to the square of the wavefront
tilt angle, and already small tilt values will cause unacceptable amplitude differences. The baseline system design foresees
high accuracy star trackers mounted in the focal plane of each telescope spacecraft with a large CCD detector. An alternative
design is to sense the wavefront tilt as received in the central beam combiner spacecraft. The wavefront sensor is to be
mounted in the cryogenic payload module of the telescopes or the beam-combiner spacecraft. This shall be done coherently
and complementary with the Fringe Sensor developments.
Deliverables:
Detailed resource specification of the sensor; breadboard; preliminary characterization of the performance; recommendations
about integration and beam routing.
Current TRL: TRL2 Target TRL: TRL3-4 Application Need/Date: TRL5 by 2012
Application/Mission: Darwin Contract Duration: 18 months
SW Clause : - Dossier0 Ref.: T-7973
Consistency with Harmonisation
Roadmap and Conclusions:
Not directly linked to harmonised technology.
TRP Reference: T203-11MM
Title:
Integrated optics
This activity deals with the design and manufacturing of optical components and functional devices in integrated-optics
technology. In comparison to a realisation of the same functionality by bulk optics, an integrated optics device provides large
benefits by its low mass and its low sensitivity to temperature and other environmental factors. Whereas integrated-optics for
telecommunications (operating at 1.5 micron) is a well-mastered technology, the spectral range of DARWIN is not yet
explored or mastered. The challenge is to find materials which are transparent in this spectral range, but allow also defining
two-dimensional waveguiding effects using reliable manufacturing processes. Therefore a number of different materials and
technologies (e.g. integrated optics by photo inscription, Index guided photonic crystals) will have to be investigated
experimentally, and the most promising combination will be selected for the manufacturing of sample devices.
Deliverables:
Integrated-optics components to be used in an interferometer breadboard.
Current TRL: TRL2 Target TRL: TRL3-4 Application Need/Date: TRL5 by 2012
Application/Mission: Darwin Contract Duration: 24 months
SW Clause : - Dossier0 Ref.: T-7988
Consistency with Harmonisation
Roadmap and Conclusions:
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