This document discusses the timing system requirements for a picosecond laser experiment. It describes how the timing system synchronizes the various components of the laser system, including two amplifiers, Pockel cells, and diagnostics instruments, which operate at frequencies ranging from 10 Hz to 100 Hz. The timing system provides 8 delayed output pulses with picosecond resolution and jitter to trigger the different elements. It can be controlled via a GUI and fiber optic cables. The timing solutions are also applicable to experiments using petawatt lasers, synchrotrons, and other large physics facilities.

1. Timing system
for picosecond laser experiences
CLEO : 2012
1 1

2. • Typical laser system application
• Timing requirements
• BNC solutions
• Trigger mode
• Synchronized output Pulse
• GUI
• Other applications
2

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
3
 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)
4

5. BNC solution
Base Topology
Central
Master Oscillator
SHOT Transmitter
AREA 1 AREA 2
Local Local
Delay generator Delay generator
Equipment Equipment
Pilote Diagnostics
Equipements
BIG PHYSIC EXPERIMENT
5

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
6

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
7

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
8

9. GUI
9

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
10

11. Other applications
 Petawatt
 High energy laser
 Synchrotron
 Big Physics experiment
About the Company
BNC Scientific, a division of Berkeley Nucleonics Corporation, is
available to address growing demands in the scientific community with
Tel (866) 276-6188 strong, US-based service and application support. We offer a high degree
of attention to each application with unparalleled use of technology
Fax (707) 262-6522 11
resources. BNC Scientific represents best-in-class instrumentation for
applications in research.