DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005

Matter under extremes conditions

Femtosecond Laser Servers

Laboratoire Francis Perrin

SPAM

Atoms, Photons and Molecules Laboratory

•Applications of Plasmas

•High Energy Density Matter

•Attophysics

• High Intensity Physics

• Dynamics of Chemical Reactivity

• Excited Biomolecules

• Nanometrics Buildings

• Theoretical Chemistry

Laser Sources Teams Technical Support(Mechanics, Vacuum, CAD)

SLIC

DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005

10 years experience - 4 servers – 10 beamlines

LUCA, tunability from 10 to 800 nm SOFOCKLE : High repetition rate (KHz) UHI10: haute puissance de 10 TW

: High repetition rate Tunability

More than 90%

Reliabili

ty for scientists CEA, France,

Europe60%, 20%, 20%

Open

Sources

Complementarity

PLFA

SLICSaclay Laser Interaction Center

DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005

3rd order Cross Correlator Optical scheme (colinear version)

Input beam

Neutraldensities

Half wave plate

Polarisers

SHG TypeI BBO crystal SFM TypeI BBO crystal

Prisms

Interference filter“Solar blind” PMT

-260 -250 -240 -230 -220 -210

1E-12

1E-11

1E-10

1E-9

1E-8

1E-7

1E-6

1E-5

1E-4

1E-3

0.01

0.1

1

Delay (ps)

Inte

nsi

ty

Sequoia is the first commercial high dynamic range third-order femtosecond cross-correlator, an ideal tool for high precision measurements of the temporal pulse shape of femtosecond lasers.

R&D in laser femtosecond temporal diagnostics

DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005

  Year

Total research

effort [PM]

PM EU-

requestPersonnel

Durable Equipment

Consumables TravelTotal eligible costs (a+b)

FC, FCF requested

CEA 1 6 6 30 000,00 0,00 0,00 2 000,00 38 400,00 19 200,00

CEA 2 12 12 60 000,00 0,00 0,00 4 000,00 76 800,00 38 400,00

CEA 3 6 0 0,00 0,00 0,00 2 000,00 2 400,00 1 200,00

  Total € 24 18 90 000,00 0,00 0,00 8 000,00 117 600,00 58 800,00

CEA/DS3Financial and Work Plan

Synchronisation and Feedback: RF to Laser and Electron BeamParticipants: ELETTRA, CEA, CNRS (LOA, LULI, ELYSE), ENEA, INFN, MAX-Lab

•Study the synchronisation issues between the master laser system, supplying the laser for the photo-injector, and another beam from the master laser system which could be used for seeding the first stage of a harmonic generation cascade, or for pump-probe user experiments at the different stages of the accelerator.•KHz tests on PLFA, studies on mechanical stability, amplifiers’ gain

DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005

Ma

ste

r O

sc

illato

r

dazzler

POCKELS

/2

VERDI(532 nm, 4 W)

ph1

ph2

15 fs, 70 nm

POCKELS

POCKELS

Ti Sa

TiSa

Preamplifier (Gain x3)

Regenerative Amplifier(Gain x105)

6W

9W

2W

660mW

POCKELS

JADE

JADE(527 nm, 20 W)

JADE

JADE

JADE

US

ER

S

4.7W

30 fs

Multipass Amplifier

Compressor

Stretcher

PLFA(Tunable Femtosecond Laser Platform)

(Gain x10)

Ti:Sa

1 KHz, 20 mJ, 30 fs pulses

DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005

CEA/DS3Synchronization, Jitter and Drift

How really large is the jitter in KHz laser systems ?

•Averaged on different timescalesPump Laser StabilityMechanical stability (two amplified beams)Air Flow dynamics

Non Linear effects in short pulse propagation

What about the drift ?

•Shot to Shot Pointing

Oscillator and Pump Laser Stability

•Thermal Stability

Main Goal : Systematic Analysis

DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005

CEA/DS3Experimental Strategy

Spectral Interferometry

Single Shot Cross Correlator

Spatial Interferometry

•Portability•High Rate Acquisition with minor cost

•Two amplified arms

• High Accuracy (get sub-fringe information~2 fs)• No sensitivity to pointing fluctuations• Different spectra (no contrast reduction)• Analysis of different chirps (different fringe contrast)

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