NEC's TUNABLE CW InGaAsP
MQW DFB LASER DIODE MODULE
WITH WAVELENGTH MONITOR
NX8571
SERIES
FOR DWDM APPLICATIONS (10 mW MIN)
FEATURES
DESCRIPTION
NEC's NX8571 Series is a 1550 nm Multiple Quantum Well
(MQW) structured Distributed Feed-Back laser diode with
wavelength monitor function. This device is temperature tun-
able up to 8 x 50 GHz channels. Available at both C-band
(1530.334to1565.087nm)andL-band(1565.496to1608.760
nm) ITU-T grid wavelengths. This device is designed as a CW
light source and is ideal for transmission systems in which
external modulators are used.
• WAVELENGTH MONITOR FUNCTION:
(Etalon Filter, Wavelength monitor PD)
• OUTPUT POWER:
Pf = 10 mW MIN
• AVAILABLE FOR DWDM WAVELENGTHS
BASED ON ITU-T RECOMMENDATIONS:
(50 GHz Grid)
• NX8571SCXXXD - 4 X 50 GHz TUNABLE
• NX8571SCXXXQ - 8 X 50 GHz TUNABLE
• INTERNAL THERMOELECTRIC COOLER AND
ISOLATOR
•
HERMETICALLY SEALED 14-PIN BUTTERFLY PACKAGE
• POLARIZATION MAINTAIN FIBER PIGTAIL
ELECTRO-OPTICAL CHARACTERISTICS (TLD = 25°C, TC = -5 to +70°C, unless otherwise speciÞed)
PART NUMBER
NX8571 SERIES
TYP
SYMBOLS
PARAMETERS AND CONDITIONS
UNITS
MIN
MAX
Fixed wavelength
°C
20
35
4 channel tunable
10
45
55
TSET
Laser Set Temperature
8 channel tunable
5
VF
ITH
IOP
Pf
Forward Voltage, Pf = 10 mW
Threshold Current
V
0.9
1.2
20
70
2.5
40
mA
mA
mW
µW
nm
Operation Current, Pf = 10 mW
167
Optical Output Power from Fiber, IF = 167 mA, TLD = TSET
Threshold Output Power from Fiber, IF = ITH
Peak Emission Wavelength, Pf = 10 mW, CW, TLD = TSET
Wavelength Stability, TLD = Tset,
20
1530
-20
PTH
λp
100
ITU-T1
1609
applicable to wavelength monitor, E.O.L.
Spectral Line Width, Pf = 10 mW, CW, 3 dB down
Side mode Suppression Ratio, Pf = 10 mW, CW
Relative Intensity Noise, Pf = 10 mW, 20 MHz to 3 GHz
Isolation
pm
MHz
dB
+20
2
∆ν
SMSR
RIN
1
35
45
dB/Hz
dB
-150
ISOL
ext
30
20
Polarization Extinction Ratio2, Pf = 10 mW, CW
dB
Notes:
1. Wavelength selectable for ITU-T standards (50 GHz grid).
Please refer to tables A, B, and C.
2. Polarization state of LD is aligned parallel to the slow axis.
California Eastern Laboratories
