Photodiodes. FDG03 Datasheet

FDG03 Photodiodes. Datasheet pdf. Equivalent


Thorlabs FDG03
Product Specification Sheet
Photodiodes
CAUTION
ELECTROSTATIC SENSITIVE DEVICE
DO NOT HANDLE EXCEPT
WITH AN ESD WRIST STRAP AT A
STATIC-FREE WORKSTATION
FDG03
Description
The Thorlabs FDG03 photodiode is ideal for measuring both pulsed and
CW fiber light sources, by converting the optical power to an electrical
current. The detector is housed in a TO-5 package with an anode,
cathode, and case connection. The photodiode anode produces a
current, which is a function of the incident light power and the
wavelength. The responsivity (λ), can be read from the responsivity
graph to estimate the amount of photocurrent to expect. This can be converted to a voltage by placing a load
resistor (RL) from the photodiode anode to the circuit ground. The output voltage is derived as:
= ×ℜ ×
The bandwidth, fBW, and the rise time response, tR, are determined from the diode capacitance, CJ, and the
load resistance, RL, as shown below. Placing a bias voltage from the photo diode cathode to the circuit ground
can lower the photo diode capacitance.
=2 1
, = 0.35
Specifications
Specification
Wavelength Range
Active Area
Rise/Fall Time, Typ (RL=50 , 3 V)
Bandwidth (RL=50 , -3 dB, 3 V)
NEP, Typical (1550 nm)
Dark Current, Max (1 V)
Capacitance, Max (1 V)
Package
Value
800 - 1800 nm
Ø3.0 mm (7.1 mm2)
500 ns
0.7 MHz
1.0 x 10-12 W/Hz½
4.0 µA
4.0 nF
TO-5
Recommended Circuit Diagram
Specification
Sensor Material
Max Ratings
Damage Threshold, CW
Damage Threshold, Pulse
Max Bias (Reverse) Voltage
Operating Temperature
Storage Temperature
Reverse Current
Forward Current
Value
Ge Pin
10 W/cm2
n/a
3V
-55 to 60 °C
-55 to 60 °C
n/a
n/a
Application of a reverse bias can greatly improve the response speed and linearity of the device. This is due to
increase in the depletion region width and, consequently, decrease in junction capacitance. However, the dark
current and noise will increase.
+
Bias
Voltage
-
Noise Filter
R1 = 1 kΩ
C1 = 0.1 μF
PD +
RL Vo
-
*
* Case ground for PD with a third lead.
13846-S01 Rev G – Nov 3, 2011
Specifications subject to change without notice.


FDG03 Datasheet
Recommendation FDG03 Datasheet
Part FDG03
Description Photodiodes
Feature FDG03; Product Specification Sheet Photodiodes CAUTION ELECTROSTATIC SENSITIVE DEVICE DO NOT HANDLE EXCEP.
Manufacture Thorlabs
Datasheet
Download FDG03 Datasheet




Thorlabs FDG03
Product Specification Sheet
Graphs
The responsivity of a photodiode is a measure of its sensitivity to light, and it is defined as the ratio of the
photocurrent IP to the incident light power P at a given wavelength:
=
In other words, it is a measure of the effectiveness of the conversion of light power into electrical current.
Responsivity varies from lot to lot and with the wavelength of the incident light, applied reverse bias, and
temperature. It increases slightly with applied reverse bias due to improved charge collection efficiency in the
photodiode. The change in temperature increases or decreases the width of the band gap and varies inversely
with the temperature.
FDG Series Photodiode Responsivity
1.0
0.8
0.6
0.4
0.2
0.0
600
Drawings
2
800
1000
1200
1400
1600
1800
Wavelength (nm)
0.17"
(4.2 mm)
Ø0.33"
(Ø8.3 mm)
Ø0.24"
(Ø6.09 mm)
0.045"
(1.14 mm)
Ø0.36"
(Ø9.1 mm)
45°
12
1
Pin Description
1 Anode
2 Cathode
0.02"
(0.5 mm)
0.5"
(12.7 mm)
Ø0.20"
(5.1 mm)
USA, Canada, & S. America
Thorlabs, Inc.
435 Route 206
Newton, NJ 07860, USA
Tel: 973-579-7227
Fax: 973-300-3600
www.thorlabs.com
email: feedback@thorlabs.com
Europe
Thorlabs GmbH
Hans-Böckler-Str. 6
85221 Dachau, Germany
Tel: +49-(0)8131-5956-0
Fax: +49-(0)8131-5956-99
www.thorlabs.com
email: Europe@thorlabs.com
UK and Ireland
Thorlabs LTD.
1 Saint Thomas Place, Ely
Cambridgeshire CB7 4EX, GB
Tel: +44 (0)1353-654440
Fax: +44 (0)1353-654444
www.thorlabs.com
email: sales.uk@thorlabs.com
Scandinavia
Thorlabs Sweden AB
Box 141 94
400 20 Göteborg, Sweden
Tel: +46-31-733-30-00
Fax: +46-31-703-40-45
www.thorlabs.com
email: scandinavia@thorlabs.com
Japan and Asia
Thorlabs Japan Inc.
5-17-1, Ohtsuka
Bunkyo-ku, Tokyo 112-0012, Japan
Tel: +81-3-5979-8889
Fax: +81-3-5979-7285
www.thorlabs.jp
email: sales@thorlabs.jp
13846-S01 Rev G – Nov 3, 2011
Specifications subject to change without notice.







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