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CELINE : CELestial Infrared Nulling Experiment

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CELINE : CELestial Infrared Nulling

Experiment

Charles Hanot, Pierre Riaud, Serge Habraken, Jean Surdej

ARC meeting, 11February 2010

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Introduction

Last Year This year

Fibered laser diode 1.55 µm and 2.3 µm SMF-28e Masks + fiber launcher

Aluminum coated parabola Aluminum coated parabola Achromatic Phase Shifter

Achromatic Phase Shifter

Monopixel detector SMF-28e Fiber launchers 152.4 mm 609.6 mm 152.4 mm 609.6 mm Wedged plates Wedged plates CaF2 Lens Masks + fiber launcher

ANE : AEOS - Hololab

Nulling Experiment CELINE

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Introduction

Direct imaging of exo-Earths:

Huge contrast ratio:

2x107 (10µm) & 1010 (visible)

>109 >106

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Introduction

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Introduction

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Adaptative Nuller Testbed (JPL)

Introduction

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Introduction

Achromatic Nulling Testbed (JPL)

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Introduction

Planet Detection Testbed (JPL)

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Introduction

SYNAPSE (IAS)

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Introduction

Fiber Nuller

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Our Goals

Simple fully symmetric scheme

Reflective

Broadband nulling (H & K bands)

Test Achromatic phase shifters

Test new single-mode fibers

Principles

Objectives

! Fibered laser diode

1.55 µm and 2.3 µm SMF-28e Masks + fiber launcher

Aluminum coated parabola Aluminum coated parabola Achromatic Phase Shifter

Achromatic Phase Shifter

Monopixel detector SMF-28e Fiber launchers 152.4 mm 609.6 mm 152.4 mm 609.6 mm Wedged plates Wedged plates CaF2 Lens Masks + fiber launcher

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Status

Experiment running and properly aligned

Monochromatic laser

«Delay lines» working

Need to mount APS

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First results 80 100 120 140 160 180 200 220 240 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Time [s] Null depth 5 10!4 Background Maxing Nulling jeudi 11 février 2010

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First results

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First results 10!1 100 101 102 10!7 10!6 10!5 10!4 10!3 10!2 Frequency [Hz] Density jeudi 11 février 2010

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Conclusions

Development of an achromatic nulling testbed

Instrument easy to use

Instrument ready to use

First results are promising

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Thank you !!!

Questions??

Références

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