True DC Output Option
The PT-12A is available with optional dual power supplies, which
enables adjustment and/or stabilization of the DC output to enable
accurate extinction ratio measurements.
Eye pattern taken at 12.5 Gb/s data rate
with -10 dBm optical input power.
PT-12A
Product Bulletin (Preliminary) • January 2005
• PIN/TIA receiver
• High data rate, up to 12.5 Gb/s
• High sensitivity, -20 dBm
• 1200–1650 nm wavelength range
• Compact 8-pin butterfly package
• SMA or GPO output connector
The PT-12A is a -18 dBm sensitivity,
single-output receiver module for OC-192/
STM-64 with FEC transmission system
receive applications including NRZ with
Super FEC up to 12.5 Gb/s. It couples a
high responsivity (1.0 A/W), back-
illuminated PIN photodiode, usable from
1200 nm to 1650 nm, with an internal
transimpedance gain stage of 475 V/A.
This combination produces a receiver with
a 10 GHz band-width and a conversion
gain of 475 V/W.
The single-coaxial output module is
available with either an SMA or GPO
output connector in a compact, 8-pin
butterfly package with single-mode fiber
input. The receiver meets Telcordia
GR-468 qualification standards.
Specifications
Minimum
Typical
Maximum
Units
Wavelength range
1200
1650
nm
Bandwidth (-3dB electrical)
9
10
GHz
Low frequency cutoff1
DC
kHz
Sensitivity2
-20
-18
dBm
Overload
0
dBm
Group Delay (1 to 10 GHz)
25
40
ps
Responsivity @ 1550 nm
0.8
1.0
A/W
Conversion gain
400
475
V/W
Output Return Loss (0.1 to 8 GHz)
-10
dB
Optical Return Loss
-30
dB
Power dissipation
.22
W
DC Electrical
Photodiode voltage
+5
+8
+12
V
Amplifier voltage (V
POS)
+3.2
+3.3
+3.4
V
Amplifier voltage (V
NEG)
-2.1
-2.0
-1.9
V
Mechanical
Package type
8-pin butterfly with SMA or GPO
Operating temperature
0
+70
°C
Storage temperature
-40
+85
°C
1 Output is DC coupled
2 10-10 BER, PRBS 223-1
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