NEC'S EA MODULATOR AND
WAVELENGTH MONITOR INTEGRATED
InGaAsP MQW DFB LASER DIODE
NX8567SA
Series
MODULE FOR 2.5 Gb/s ULTRALONG-REACH 240,
360, 600 km DWDM APPLICATIONS
FEATURES
DESCRIPTION
• INTEGRATED ELECTROABSORPTION MODULATOR
NEC's NX8567SASeries is an Electro-Absorption (EA) modu-
lator and wavelength monitor integrated, 1 550 nm Multiple
QuantumWell(MQW)structuredDistributedFeed-Back(DFB)
laser diode module. The module is capable of 2.5 Gb/s ap-
plications of over 240 km, 360 km, 600 km ultralong-reach and
availableforDenseWavelengthDivisionMultiplexing(DWDM)
wavelengths based on ITU-T recommendations, enabling a
wide range of applications
• WAVELENGTH MONITOR FUNCTION
(Etalon Þlter, Wavelength monitor PD)
• VERY LOW DISPERSION PENALTY
NX8567SAS Series - over 240 km (4320 ps/nm)
NX8567SAM Series - over 360 km (6480 ps/nm)
NX8567SA Series - over 600 km (10800 ps/nm)
• LOW MODULATION VOLTAGE
• AVAILABLE FOR DWDM WAVELENGHT BASED ON
ITU-T RECOMMENDATION (50 GHz grid, refer to
ordering information)
ELECTRO-OPTICAL CHARACTERISTICS (TLD = Tset, TC = -5 to +70°C, unless otherwise speciÞed)
PART NUMBER
NX8567SA SERIES
SYMBOLS
TSET
PARAMETERS AND CONDITIONS
UNITS
°C
MIN
20
50
-2.0
–
TYP
MAX
35
Laser Set Temperature1
IOP
Operating Current
Modulation Center Voltage2
Modulation Voltage2
mA
V
60
–
80
Vcenter
Vmod
-0.5
3
V
2
VFLD
Forward Voltage of LD, IFLD = IOP
Threshold Current
V
–
–
2.0
20
ITH
mA
–
7
IFLD = IOP, Under modulation2
(NX8567SAM/SA Series)
IFLD = IOP, Under modulation2
(NX8567SAS Series)
-5
0
-2
–
–
Pf
Optical Output Power from Fiber,
dBm
+1
λP
SMSR
ER
tf
Peak Emission Wavelength, IFLD = IOP, VEA = 0 V
Side Mode Suppression Ratio, IFLD = IOP, VEA = 0 V
Extinction Ratio, IFLD = IOP, Under modulation2
Rise Time, IFLD = IOP, 20-80%, Under modulation2
Rise Time, IFLD = IOP, 80-20%, Under modulation2
nm
dB
dB
ps
1528
30
10
–
ITU-T3
1564
–
40
11
–
–
125
125
tr
ps
–
–
Notes:
1. Tset is a certain point between 20 and 35C for ITU-T grid wavelength
±
2. 2.48832 Gb/s, PRBS 223 -1, VEA = Vcenter 1/2 Vmod, IFLD = Iop, TLD = Tset, NEC Test System
Vcenter
Vmod
Iop
: a certain point between -2.0 and -0.5 V
: a certain point 3 V or below
: a certain point between 50 and 80 mA
3. Available for DWDM wavelenght based on ITU-T recommendation (100 GHz grid). Please refer to ORDERING INFORMATION.
4. BER = 10-10, NX8567SAS: 240 km (4320 ps/nm)
BER = 10-10, NX8567SAM: 360 km (6480 ps/nm)
BER = 10-10, NX8567SA: 600 km (10800 ps/nm)
California Eastern Laboratories