1550 nm OPTICAL FIBER COMM.
EA MODULATOR INTEGRATED MQW-DFB
LASER DIODE MODULE FOR 2.5 Gb/s D-WDM
ULTRALONG-REACH APPLICATIONS (600 km)
NDL7912P
SERIES
FEATURES
DESCRIPTION
The NDL7912P is an EA modulator integrated 1550 nm DFB-
LDmodulefor2.5Gb/s.Thenewlydevelopedbandgapenergy
controlled selective MOVPE technology is utilized as the
fabricationmethod.Itisdesignedfor2.5Gb/sD-WDMultralong-
reach applications.
• INTEGRATED ELECTROABSORPTION MODULATOR
• VERY LOW DISPERSION PENALTY OVER 600 km
• LOW MODULATION VOLTAGE
• WAVELENGTH SELECTABLE FOR ITU-T STANDARDS
• 14-PIN BUTTERFLY PACKAGE
ELECTRO-OPTICAL CHARACTERISTICS (TLD = 25°C, TC = -20 to +70°C, unless otherwise specified)
PART NUMBER
NDL7912P
PACKAGE OUTLINE
SYMBOLS
TSET
IOP
PARAMETERS AND CONDITIONS
UNITS
°C
MIN
20
50
0.5
2
TYP
MAX
35
Laser Set Temperature
Operating Current
mA
V
100
1.5
3
VRmc
VRmpp
VFLD
ITH
Modulation Center Voltage
Modulation Voltage
V
Forward Voltage of LD, IFLD = IOP
Threshold Current
V
1.8
20
mA
mW
7
Pf
Optical Output Power from Fiber,
VRm = 0 V, IFLD = IOP
0.5
λP
Peak Emission Wavelength, IFLD = IOP, VRm = 0 V,
TLD = TSET
nm
Specified to ITU-T1
4
∆υ
Spectral Line Width, IFLD = IOP, -20 dB,
Under modulation2
GHz
SMSR
ER
Side Mode Suppression Ratio, IFLD = IOP, VRm = 0 V
Extinction Ratio, IFLD = IOP, Under modulation2
dB
dB
30
10
fC
Cut-off Frequency, IFLD = IOP, VRm = 1/2 VRmpp,
GHz
3.2
-3 dB, 50 Ω
tf
tr
Rise Time, IFLD = IOP, 20-80%, Under modulation2
Rise Time, IFLD = IOP, 20-80%, Under modulation2
ps
ps
dB
125
125
2
Pe
Transmission Penalty Due to Dispersion, IFLD = IOP,
Under modulation2, 600 km standard fiber3
ISOL
Isolation
dB
30
Notes:
1. Please refer to Ordering Information.
2. 2.48832 Gb/s, PRBS 223-1, VRm = VRmc ± 1/2VRmpp, NEC Test System.
3. 600 km standard fiber NEC Test System, Transmission penalty at BER = 10-9
California Eastern Laboratories