The PD-40 is a 40 GHz bandwidth InGaAs PIN photodetector optimized for wavelengths between 1250-1650 nm. It features high linearity up to 40 mW of input power and a flat frequency response within ±1 dB up to 40 GHz, making it suitable for applications requiring wide bandwidth such as analog RF transmission and digital signals up to 40 Gbps. The photodetector comes in a standard 2-pin package with K connector and can be ordered with or without an external protective housing.

1. PD-40
40 GHz Linear InGaAs PIN Photodetector
The Optilab PD-40 is a highly linear, 40 GHz bandwidth InGaAs PIN photodetector that is ideal for use in O/E
front-ends requiring wide band frequency response. The coplanar waveguide photodiode design optimizes
speed and sensitivity for the 1250 nm through 1650 nm wavelength range, and assures a 40 GHz frequency
response necessary for digital and analog applications. The front-illuminated mesa-structured PIN design
allows a high input power level of up to 40 mW. The PD-40 is available in a standard 2-pin package with K
output connector for ease of assembly, and can be ordered with or without the external protective housing, or
with FC/APC connectors for standard. Contact Optilab for more information.
Features
➤ Wide bandwidth 60 KHz to 40 GHz
➤ Highly Linear to 30 mW+ input power
➤ Operating Temperature from -10ºC to +50ºC
➤ High Current Handling up to 35 mA
➤ Flat frequency response, ±1 dB
➤ Useful Spectral Range 850 nm -1650 nm
➤ Hermetically Sealed
➤ 1 year warranty standard
Functional Diagram
Applications
➤ Analog RF over Fiber
➤ Optically Amplified Systems
➤ RZ and NRZ up to 40 Gb/s
➤ LIDAR Measurements
➤ Coherent Lightwave Systems
➤ Front-End O/E Converter for Test Instruments
PD-40
PD-40 with External
Housing

2. 40 GHz Linear InGaAs PIN Photodetector| PD-40
OPTIONS
PD-40-x
x
Housing Type; A, No
Housing, default; B,
External Housing. R,
ROSA package
TECHNICAL INFO
For technical info and support:
sales@optilab.com
www.optilab.com
PHONE
Contact Optilab at:
1-888-553-3888 (toll-free)
1-602-343-1496 (direct, int’l)
Optilab, LLC
Phoenix, AZ, USA
WEB ORDER
To order this any many more products,
please visit OEQuest.com and order
online today.
Optilab Advantage
➤ Innovation
➤ Performance
➤ Quality
➤ Customization
➤ Warranty
photonics for the lab
General Specifications
Optimized Operating Wavelength 1000 nm to 1650 nm
Useful Operating Wavelength 850 nm to 1650 nm
Optical Input Level 40 mW max.
S21 3 dB Bandwidth 35 GHz min., 37 GHz typ.
S22 Characteristics < -10 dB @ 30 GHz
Repsonsitivity
Product specifications and description are subject to change without notice. © 2014 Optilab, LLC. PD-40 February 2014
0.55 A/W @ 1550 nm typ.
0.60 A/W @ 1310 nm typ.
0.30 A/W @ 850 nm typ.
Dark Current @ 25° C, 5 V 10 nA typ., 100 nA max.
Optical Return Loss -30.00 dB typ.
Optical PDL @ 1550 nm 0.05 dB max.
Optical Fiber SMF-28
Bias Voltage 5 V typ.
Impedance 50 Ω
Coupling AC-Coupled
Analog Applications
Useful Bandwidth 60 KHz to 40 GHz
Ripple over any 1 GHz ±1.0 dB max.
Group Delay ±7.0 ps
2nd Harmonics Distortion -70.0 dBc max.
3rd Harmonics Distortion -75.0 dBc max.
Digital Applications
Sensitivity @ 10 Gb/s -19.0 dBm
Recieving Bandwidth Up to 40 Gb/s
Data Format RZ, NRZ
Mechanical Specifications
Operating Temperature -10º C to +50º C
Storage Temperature -20º C to +80º C
Operating Humidity 85%
Photodiode Bias Voltage 5 V, ± 1 V DC
Package type 2-pin module with K type RF
connector
Dimensions 30 mm x 20 mm x 14 mm
Fiber Connector FC/APC
Optical Fiber SMF-28 with 900 mm Tube
Absolute Maximum Ratings
PIN Bias Voltage +2.0 to +7 V
Forward Current 35 mA
Optical Input Power Damage
Threshold 40 mW

3. 40 GHz Linear InGaAs PIN Photodetector| PD-40
PD-40 Mechanical Drawing3
0.900
PD-40 Mechanical Drawing w/ External Housing4
S21 O/E Response1
5
0
-5
-10
-15
-20
-25
-30
-35
-40
0 5 10 15 20 25 30 35 40 45 50
Frequency (GHz)
Optical S21 (dB)
4.191
6.200
30
20
B
PD-30 CSO, CTB
DO NOT SCALE DRAWING REVISION
PD-30 Link Loss
SCALE 1:1 REVISION
PD-30
Assem1
JOHN 4/6/10
CSO, CTB Linearity Measurement2
PD-30 CSO, CTB
WEIGHT:
A4
TITLE:
72
66
60
54
48
-9
-15
-21
-27
-33
-39
DWG NO.
SCALE:1:2 SHEET 1 OF 1
MATERIAL:
NAME SIGNATURE DATE
TITLE:
DWG NO.
DEBUR AND
BREAK SHARP
EDGES
UNLESS OTHERWISE SPECIFIED: FINISH:
DIMENSIONS ARE IN MILLIMETERS
SURFACE FINISH:
TOLERANCES:
LINEAR:
ANGULAR:
DRAWN
CHK'D
APPV'D
MFG
Q.A
72
66
60
54
48
-9
-15
-21
DO NOT SCALE DRAWING NAME PD-30 Link Loss
Loss (dB)
42
0 2 4 6 8 10 12 14 16
Distortion (dB)
Optical Input Power Level (dBm) CTB
CSO
-45
0 2 4 6 8 10 12 14 16
Link Loss (dB)
Optical Input Power Level (dBm)
42
0 2 4 6 8 10 12 14 16
Distortion (dB)
Optical Input Power Level (dBm) CTB
CSO
Freq. Gen.
Matrix ASX‐16C
Laser Tx
LT‐20‐A‐M
Optical Amplifier
rEDFA‐17
30
14
0.900
4.191
6.200
30
20
6.200
4.191
0.900
11
26
10226-009 01
WEIGHT:
A4
SCALE:1:1 SHEET 1 OF 1
MATERIAL:
NAME SIGNATURE DATE
DEBUR AND
BREAK SHARP
EDGES
OTHERWISE SPECIFIED: FINISH:
ARE IN MILLIMETERS
FINISH:
TOLERANCES:
26
11
26
TITLE:
SIGNATURE DATE
DEBUR AND
BREAK SHARP
EDGES
UNLESS OTHERWISE SPECIFIED: FINISH:
DIMENSIONS ARE IN MILLIMETERS
SURFACE FINISH:
TOLERANCES:
LINEAR:
ANGULAR:
photonics for the lab
DRAWN
CHK'D
Link Loss
1 Measured by Agilent 86030A Lightwave Component
Analyzer
2 40 Channel Analog Channel Loading
3 All measurements are in Metric
4 External housing is for Mechanical Protection Only
Product specifications and description are subject to change without notice. © 2014 Optilab, LLC. PD-40 February 2014