Photodiodes. FGA04 Datasheet

FGA04 Photodiodes. Datasheet pdf. Equivalent


Thorlabs FGA04
435 Route 206 • P.O. Box 366
Newton, NJ 07860-0366
FGA04 InGaAs Photodiode
High Responsivity
Low Capacitance: High Speed
Fiber Compatible with FC Connector
PH. 973-579-7227
FAX 973-300-3600
Electrical Characteristics
Spectral Response:
Active Diameter:
Rise/Fall Time (RL=50):
Bandwidth (RL=50, -3dB,5V):
NEP@1550nm:
Dark Current @ (5V):
Capacitance @ (5V):
Package:
800-1700nm
100µm
0.1ns min. @ (5V)
2GHz min. @ (5V)
1.5*10-15 W/Hz
typ.
0.5nA typ. (1.0nA
max)
1.0pF typ. (1.2pF
max)
TO-46(mod) w/ FC
Bulkhead Conn.
Maximum Ratings
Damage Threshold CW:
Max Bias (Reverse) Voltage:
Storage Temperature:
Operating Temperature:
Reverse Current:
Forward Current:
100mW
25V
-40 to 125° C
-40 to 85° C
10mA
10mA
0.362
X
0.295
0.079
Ø0.748
0.530
Ø0.086 THRU HOLE
CBORE Ø0.160 X 0.620 DEEP
2 PLACES
X
CL
M8 X 0.75 THREAD
1.000
2
0.050
SECTION
3 X-X
0.050
31
2
1 Ø0.017
0.050
Description
The Thorlabs FGA04 photodiode is ideal for measuring both pulsed and CW fiber light sources, by converting the
optical power to an electrical current. The InGaAs detector is housed in a TO-46(mod) package with an anode,
cathode and case connection, mounted in an FC bulkhead connector. 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 Figure
1 to estimate the amount of photocurrent to expect. This can be converted to a voltage by placing a load resistor
(RLOAD) from the photodiode anode to the circuit ground. The output voltage is derived as:
Vo = P * (λ) * RLOAD
The bandwidth, fBW, and the rise time response, TR, are determined from the diode capacitance, CJ, and the load
resistance, RLOAD, as shown below. The diode capacitance can be lowered by placing a bias voltage from the
photodiode cathode to the circuit ground. The effect of the bias voltage vs. Diode capacitance can be read from
Figure 2.
fBW = 1/(2π * RLOAD *CJ), TR = 0.35/fBW
3154-S01 Rev A 7/21/00
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FGA04 Datasheet
Recommendation FGA04 Datasheet
Part FGA04
Description Photodiodes
Feature FGA04; 435 Route 206 • P.O. Box 366 Newton, NJ 07860-0366 FGA04 InGaAs Photodiode High Responsivity Low Ca.
Manufacture Thorlabs
Datasheet
Download FGA04 Datasheet




Thorlabs FGA04
Related Thorlabs Products
D400FC, FGA10, Fiber Optic cables and Patch Cords, FC Connectors, and FC fiber polishing kits.
Typical Circuit Diagram
Noise Filter (Typical Values)
R1
1K
FGA04
C1
0.1UF
RLOAD
+
Vo
-
Typical Plots
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
800
FGA04 Responsivity
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
Wavelength (nm)
Figure 1
Capacitance vs Reverse Bias
10
1
0.1
0 1 2 3 4 5 6 7 8 9 10
Reverse Bias Voltage (V)
Figure 2
3154-S01 Rev A 7/21/00
Page 2 of 2







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