High Speed 1064nm Pulse sensing (Series 4X)
The 4X series of photodetectors are designed specifically for sensing high speed 1064 nm
Nd YAG laser pulses. The detector structure is designed to be fully depleted at 150 volts
reverse bias and offers high pulsed and DC responsivity at wavelengths up to 1100 nm
coupled with an extremely low capacitance per unit area.
Electrical / Optical Specifications
Characteristics measured at 22°C (±2) ambient, and a reverse bias of 150 volts, unless otherwise stated.
Single Elements
Type
No.
OSD1-4X
OSD5-4X*
OSD50-4X
OSD100-4X*
Active Area
mm
2
mm
1
5
50
100
1.13 dia
2.52 dia
7.98 dia
11.3 dia
Responsivity A/W
λ
= 1064 nm
Min.
Typ.
0.35
0.40
0.35
0.40
0.35
0.40
0.35
0.40
Dark Current nA
Max.
Typ.
50
100
500
1000
5
10
50
100
NEP WHz
-½
λ
= 1064 nm
Typ.
1.2e-13
1.7e-13
3.9e-13
5.5e-13
Capacitance pF
Vr=0 V
Vr=150V
Max.
Max.
8
32
320
640
2
4
20
36
Risetime ns
λ
= 1064 nm
RL = 50
Ω
(Typ.)
12
12
12
12
Package
TO18
TO5
TO8
13
Quadrants
(Values given are per element unless otherwise stated)
Type
No.
Active Area (Total)
mm
2
mm
Sep. mm
0.2
0.2
0.2
Responsivity A/W
λ
= 1064 nm
Min.
Typ.
0.35
0.35
0.35
0.40
0.40
0.40
Dark Current
nA
Max.
Typ.
150
300
1000
10
20
60
NEP WHz
-½
λ
= 1064 nm
Typ.
1.7e-13
2.5e-13
4.3e-12
Capacitance pF
Vr=0 V Vr=150V
Max.
Max.
80
7
155
12
480
30
Risetime ns
λ
= 1064 nm
RL = 50
Ω
(Typ.)
12
12
12
Crosstalk %
λ
= 1064 nm
Max.
Typ.
5
5
5
1
1
1
Package
QD50-4X
50 7.98 dia
QD100-4X 100 11.3 dia
QD320-4X* 320 20.2 dia
10
12
14
* Supplied with optional guard ring connected
Note: Recommended operating voltage range 0 to 150 volts, for all series 4X Detectors
Highlighted items are Centronic standard products generally available from stock
Series 4X Spectral Response Graph
Capacitance versus Bias Voltage
Due to our policy of continued development, specifications are subject to change without notice.
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