1. Timing system
for picosecond laser experiences
CLEO : 2012
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2. • Typical laser sytem application
• Timing requirements
• BNC solutions
• Trigger mode
• Synchronised output Pulse
• GUI
• Others applications
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3. Typical laser sytem application
Amplifier N°1 Amplifier N°2
Pockel Pockel Pockel Pockel
Oscillator Cell
Crystal
Cell Cell
Crystal
Cell
Experiment
Q-Switch Q-Switch
Pumplaser Pumplaser
Detector
Photot
iode
80 MHz Timing system Diagnostics
 80 MHz Oscillator
 Amplifier N°1 running at 100 Hz
 Amplifier N°2 running at 10 Hz
 Single shot target diagnostics instrument
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 Timing sytem to synchronise all trigger and control signal

4. Timing requirement
Equipements Function Frequency Delay before
the laser pulse
Amplifier N°1 Pumplaser 100 Hz 2 ms
Q-switch Single shot 3 µs
Pockel cell Single shot 1 µs
Amplifier N°2 Pumplaser 10 Hz 300 µs
Q-switch Single shot 2 µs
Pockel cell Single shot 0.5 µs
Diagnostics Single shot 10ns
Single shot 1ns
Timing system 80 MHz (*)
(*) can be driven by external R.F (from laser oscillator in our example)
or internal RF ( in this case the timing sytem drive the laser socillator)
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5. BNC solution
Base Topology
Central
Master Oscillator
SHOT Transmetter
AREA 1 AREA 2
Local Local
Delay generator Delay generator
Equipments Equipments
Pilote Diagnostics
Equipements
BIG PHYSIC EXPERIMENT
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6. GFT3011: The hart of the system
Safety control 8 delayed local Ouput Pulses
Hardware Single
Shot trigger
10 to 100MHz GFT3001 T0
RF up to 200MHz Master Oscillator Transmitter Clock Output
Ethernet Network
Monomode fiber To 8 Receiver Delay Generators
spread in a experience room or facility
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7. Trigger modes/source
Each output of the delay generator can be sets to
Repetitive Mode (5 frequency) F0
F0 (1 kHz)
F1 to F4 F1
with F1 > F2 > F3 > F4 F2
Single Shot mode
F3
SS1
SS2 F4
IN1 and IN2
frequency betwen 1 to 100 kHz SS1 M* F1
synchronous to F4 SS2
Operator
EXPERIENCE
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8. Delayed output pulse Performance
under 50Ω
Delay Resolution Jitter rms Pulse Pulse Pulse
generator Ch./ Ch. Amplitude Width Rise time
GFT1208, cPCI 1ps 15 ps 10V or 3V 0.2 to 10µs 1ns
(**)
GFT9404, PXI 1ps 15 ps 2 To 5 V 0.2 to 10µs 0.7ns
GFT1504 1ps 10 ps 2.5 to 10 V 100ns to 10ms 0.7 ns
(*)
GFT3001 1ps 10 ps 2.5 to 10 V 100ns to 10ms 0.7 ns
(*)
(* ) Channel option: 32V / 1µs, 5 to 20 V, TTL positive or negative
(**) same amplitude for all outputs
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9. GUI
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10. Accesories for timing
• GFT2002: Time interval meter to check the
quality of the timing (1ps resolution and 5ps
rms jitter)
• GFT100/GFT200: Compact module to transmit
pulse to remote location up to 1 Km via F.O
• Repeater: copy N x the trigger
• Amplifier and formating for pick-up photodiode
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11. Other applications
 Petawatt
 High energy laser
 Synchrotron
 Big Physics experiment
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