HAMAMATSU C7700 Datasheet
High Dynamic Range Streak Camera
C7700
Less than 60 ps
10 000 :1
▲ The relaxation oscillation of a laser diode can be measured
with the C7700 under single shot operation.
(The data was captured with a C4880-21 readout CCD camera.)
The C7700 is a newly developed high dynamic range
streak camera that can handle a large number of photoelectrons. This feature enables single-shot
measurements of ultrafast phenomena with a D-range
as high as 10 000 : 1.
This system is suitable for high-precision simultaneous
measurement of high-intensity and weak intensity pulse
light.
High Dynamic Range Measure
SYSTEM CONFIGURATION
3 Main Unit
1 Input Optics
Optical
intensity
Time
Incident light
Trigger signal
Space
Slit
Photocathode
(light → electrons)
C7700
Sweep circuit
Lens
Accelerating electrode
(where electrons are
accelerated)
2 Streak Tube
5 Output Optics
Sweep electrode
(where electrons are
swept in the direction
from top to bottom)
Phosphor screen
(electrons → light)
6 Readout Cameras
Dual-Scan Cooled CCD Camera C4880-21
ORCA
Control unit
2
DUAL MODE COOLED CCD CAMERA
POWER
[Operating Principle]
The light pulse to be measured is focused onto the photocathode
of the streak tube through the slit, where the photons are converted into a number of electrons proportional to the intensity of
Camera head
Camera head Control unit
Mount Table A7703
4 Image Intensifier,
Image Booster
Streak image
the incident light. These electrons are accelerated and conducted
towards the phosphor screen, and a high-speed voltage which is
synchronized to the incident light is applied. The electrons are
Time
Space
swept at high speed from top to bottom, after which they are bombarded against the phosphor screen of the streak tube and converted to an optical image.
When the light intensity of the streak image is very weak, an image
intensifier or an image booster amplifies the lo w light level streak
image.
Frame Grabber
GP-IB board
Streak Image
Analysis
Software
(IBM PC/AT Compatible)
7 Readout System
(HPD-TA)
Streak Image
Analysis Systems
for IBM
Personal computer
PC/AT
D-range of 10 000:1 of ultrafast phenomena under single-shot operation
FEATURES
● High dynamic range of 10 000:1*
● Temporal resolution of 5 ps*
● Effective photocathode size: 17 mm
Simultaneous measurement of light intensity
●
on temporal and spatial (wavelength) axis
● IEEE 488 (GP-IB) control
*[About a Dynamic Range]
The maximum dynamic range of the streak camera essence is set to
1000:1 by the measurement condition of temporal resolution 5ps, and
is set to 10 000:1 by the measurement condition of temporal-resolution
100ps. With a light intensity, the image intensifier tube, such as an
image intensifier or an image booster, is combined with a streak
camera. In this case, the image intensifier tube may restrict the
dynamic range of the measurement system. Furthermore, a read-out
camera may also restrict the dynamic range of the measurement
system.
Readout Camera
C4880-21
ORCA
2
Image Intensifier Tube
Image Intensifier
Image Booster
Image Intensifier
Image Booster
Temporal Resolution
5 ps
1000:1
-
1000:1
-
100 ps
2000:1
10 000:1
2000:1
3000:1
APPLICATIONS
● Research in volving laser fusion lasers, free
electron lasers and v arious other types of
pulsed lasers
● Plasma light emission, radiation, laser ab-
lation, combustion and explosion
Picosecond transient absorption measurement
●
(Time dependence of absorption is shown below .)
S1 - S
n
absorption
∆
OD = 0.1
▲ The 266 nm excitation (25 ps, 0.2 mJ, 2 mm focused,
single shot) of Chrysene in THF (0.5 mmol/l)
● LIDAR, Thomson scattering, time-of-flight
laser ranging
● Fluorescence lifetime measurement, time-
resolved Raman spectroscopy
∆λ = 482 to 489 nm
T1 - T
∆λ = 557 to 581 nm
12
0
n
absorption
Time (ns)
34
5
Loading...