AFBR-1310Z / AFBR-1310xZ
Fiber Optic Transmitter for Multi GHz Analog Links
Data Sheet
Description
The AFBR-1310xZ is a compact, high performance, cost
eective transmitter for multi GHz analog communication
over single mode optical ber.
The transmitter incorporates a linear wide bandwidth
InGaAsAl/InP Fabry-Perot laser packaged inside a TO-
header, coupled to a single mode ber pigtail terminated
with a standard FC/PC connector (or an SC/APC connector,
or an LC/PC connector), a monitor photodiode for closed
loop operation, a 50 ohm input impedance linear RF
amplier and a bias network that allows to separately
control the laser average output power.
The transmitter operates at a nominal wavelength of 1310
nm.
Access to RF input, electrical control signals I/Os and
amplier supply is through a exible printed circuit board.
The RF input is self biased and AC coupled, and thus does
not require an external DC block.
A suitable bracket is used to mount the transmitter onto a
PCB or metal substrate.
The high output power and conversion gain allow for a
high splitting ratio in branched Passive Optical Networks.
Features
• Compact package
Uncooled operation in a wide temperature range
High performance 1310 nm Fabry-Perot laser
Built-in high performance RF amplier
Floating Monitor Photodiode for exibility in control
loop design
Single mode ber pigtailed output with standard FC/
PC connector (AFBR-1310Z)
SC/APC pigtail option available (AFBR-1310AZ)
LC/PC pigtail option available (AFBR-1310BZ)
• Low power consumption
• Flex interconnect to customer PCB
• Minimal external circuitry required
• RoHS6 compliant
• Pairs to AFBR-2310Z Receiver for multi GHz analog links
Specications
• Nominal 50 ohm RF input impedance
• 5 mW typical output power at 50 mA laser current
(room temperature)
• 5 V RF amplier supply voltage
• 200 MHz to 5.5 GHz frequency range
• 20 mW/V typical slope eciency/conversion gain
Applications
• Analog optical links for satellite signal distribution
• In-building antenna remote systems
2
Table 1. Absolute Maximum Ratings [1]
Parameter Symbol Minimum Typical Maximum Unit Notes
Storage Temperature
(non-operating)
Ts -40 85 C
Operating Temperature Ta -40 85 C
Relative Humidity (non condensing) RH 85 %
RF amplier supply voltage 0 5.5 V
RF amplier input power Pin 20 dBm
RF amplier input DC voltage Vin 6 V
Laser bias current (direct) Ibias 100 mA
Laser bias reverse voltage 2 V
Monitor photodiode reverse voltage VR15 V
Monitor photodiode direct current 5 mA
Flex soldering temperature 300 C For manual soldering,
no longer than 2 sec/pad.
It is advisable to pre-heat
the customer PCB.
ESD capability (HBM) VESDHBM 250 V
Notes:
1. Absolute maximum ratings are those values beyond which functional performance is not intended, device reliability is not implied, and damage
to the device may occur.
Table 2. Recommended operating conditions [2]
Parameter Symbol Minimum Typical Maximum Unit Notes
Operating Temperature Ta -40 85 C
Relative Humidity (non condensing) RH 80 %
RF amplier supply voltage VCC 4.75 5 5.25 V
Monitor photodiode reverse voltage VR2 5 10 V
Notes:
2. Typical operating conditions are those values for which functional performance and device reliability is implied.
3
Table 3. Electro-Optical specications
Parameter Symbol Conditions Min. Nom. Max. Unit Notes
Output Power Po25° C, If = 60 mA 5 mW
Laser threshold current Ith T = 25° C
T = 85° C
15
30
mA
Laser operating current Iop Po = 5 mW,
T = 25° C
T = 85° C
60
95
mA
Laser wavelength λPo = 5 mw, CW, T = 25° C 1290 1310 1330 nm
Laser spectral width Δλ Po = 5 mw, CW,
Over temperature
3 nm rms
Temperature coecient of
wavelength
Δλ/ΔT 0.6 nm/°C
Laser slope eciency ηOver temperature,
CW
0.08 0.12 0.2 W/A
Relative intensity noise RIN CW, 0.2 to 5.5 GHz,
5 mW LOP
-120 dB/Hz
Monitor photo current Imon Po = 5 mW
Over temperature CW
0.4 2.5 mA
Dark current Idark At Vr = 5 V 0.1 μA
Monitor photodiode capacitance Cmon 5 50 pF
Monitor tracking accuracy [3] TA Po = 5 mW
Over temperature CW
-1.0 +1.0 dB
RF Input impedance Zin 50 Ω
Conversion gain G T = 25° C 20 mW/V
Bandwidth at -3dB BW In electrical domain 5.5 GHz
Gain ripple (peak to peak) 0.2 to 5.5 GHz +/- 3 dB
Gain temperature dependence -40 to +85° C +/- 2 dB
Low frequency cut-o 50 MHz
Third order Input Intercept point IIP3 F = 5.4 GHz +8 dBm
Second order Input
Intercept point
IIP2 Fo = 2.7 GHz, dual tone
technique
+15 dBm
RF amplier supply current Icc Vcc = 5 V 65 88 mA
Notes:
3. Monitor Tracking Accuracy is dened as: max | 10Log(Po/Po@25° C) |
4
Table 4. Pigtail parameters
Parameter AFBR-1310Z AFBR-1310AZ AFBR-1310BZ
Optical connector FC/PC SC/APC, 8° angle LC/PC
Fibre type Single Mode Single Mode Single Mode
Fibre length 0.5 ± 0.05 m 0.5 ± 0.05 m 0.5 ± 0.05 m
Secondary coating diameter 0.9 mm 0.9 mm 0.9 mm
Return loss of optical connector 35 dB minimum 45 dB minimum 35 dB minimum
Schematic Diagram
Figure 1. Schematic Diagram
Figure 2. Electrical pinout (top view after 90° bending of the exible PCB)
Package Information
The AFBR-1310xZ Transmitter is housed in a robust TO header. The amplier portion is hosted on a ex/rigid printed
circuit. The ber pigtail jacket is made of Hytrel.
The ex circuit can be soldered to the customer PCB by hand soldering or with automatic equipment (like hot bar).
Table 5. Pinout
PAD FUNCTION
1 Monitor Photodiode Cathode (oating)
2 Laser bias (anode)
3 Ground
4 RF in
5 Ground
6 RF amplier supply
7 Monitor Photodiode Anode (oating)
1 MPD cathode (oating)
2 Laser bias (anode)
3 Ground
4 RFin
5 Ground
6 RF amp [pwer supply
7 MPD anode (oating)
RF
4 RFin
2 Laser bias (Anode)
1 Monitor Photodiode Cathode
Fabry-
Perot laser
Monitor Photodiod
Single mode
ber pigtail Optical connector
(FC/PC or SC/APC
or LC/PC)
3 Ground
5 Ground
6 RF amp power supply
7 Monitor Photodiode Anode
5
Figure 3. Mechanical layout of Analog Transmitter. The ex is shown before 90° bending. All dimensions are in [mm]
Optical Connector
Fiber length 500 ± 50
2.9
12.7
17
12.2
5
Stiff part of flex board
containing SMD components
1.5 MAX
8.5
R3.7
3.3
2.3
21.5 ± 2.5
0.8 1
1.2
R0.5
R0.7
2.3
6.8
16.8
4
6.9
R3
R0.7
R0.5
R0.1
0.4
2.3
R0.2
1.2
1
0.8
For product information and a complete list of distributors, please go to our web site: www.avagotech.com
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.
Data subject to change. Copyright © 2005-2013 Avago Technologies. All rights reserved.
AV02-3184EN - September 13, 2013
PCB
≈ 3.2
≈ 3.6 ≈ 3.2
≈ 6.9
Figure 4. Example of ex bending when soldered onto a PCB. All dimensions are in [mm]
Handling information
When soldering the ex to the customer PCB, it is advisable
to avoid heating or touching with the hot iron the ber
pigtail, the header to ex interconnections and the region
of the ex where the amplier and passive components
are present.
This device is sensitive to ESD discharge. To protect the
device, it’s important to use normal ESD handling pre-
cautions. These include use of grounded wrist straps,
work-benches and oor wherever the device is handled.
Mounting hardware
An omega shaped bracket is pre-assembled to the TO
header, for easy mounting of the transmitter to the
customer PCB or better to a metal case.
Laser safety
The AFBR-1310xZ is a class 1M product, according to the
CEI IEC International Standard 60825-1, Second edition
2007-03. Invisible radiation is emitted from the ber
connector, do not view directly with optical instruments.
Recommended application circuit
Figure 5 shows the recommended application circuit.
Proper 50 ohm controlled impedance traces are required
on the Laser bias, RF input and RF amplier power supply
connections. 50 ohm terminations, in parallel to bias
inductors, are required on the Laser bias and RF amplier
power supply connections. Additionally, ltering caps are
required on the bias lines.
Figure 5. Recommended Application Circuit
To laser control
circuit
Preceding amplifier stage
50 ohm
1 nF
15 nH
Vcc = 5 V
100 nF
RF In
Laser bias (Anode)
RF amplifier
supply
MPD Cathode
RF amp
Fabry-
Perot laser
Monitor Photodiode
50 ohm
1 nF
15 nH
From laser
control circuit
100 nF
To laser control
circuit
Ground
Ground
MPD Anode