California Eastern Laboratories NX8563LA Service Manual
California Eastern Laboratories
DATA SHEET
NEC's DIRECTLY MODULATED
InGaAsP MQW-DFB
LASER DIODE MODULE
FOR 2.5 GB/s, 110 KM AND 240 KM REACH
DWDM METRO AND CATV APPLICATIONS
FEATURES
• PEAK OUTPUT POWER
Pf = 10 mW MIN.
• INTERNAL THERMO-ELECTRIC COOLER AND
ISOLATOR
• HERMETICALLY SEALED 14-PIN BUTTERFLY
PACKAGE
• SINGLE MODE FIBER PIGTAIL
• WIDE OPERATION TEMPERATURE RANGE
• AVAILABLE FOR DWDM WAVELENGTHS BASED ON
ITU-T RECOMMENDATIONS
NX8563LA
Series
DESCRIPTION
NEC's NX8563LA Series is a 1 550 nm Multiple Quantum
Well (MQW) structured Distributed Feed-Back (DFB) laser
diode module with Single Mode Fiber.
It is designed as directly modulation light source and
ideal for optical transmission systems. The device is
available for Dense Wavelength Division Multiplexing
(DWDM) wavelengths based on ITU-T recommendations,
enabling a wide range of applications.
ELECTRO-OPTICAL CHARACTERISTICS (TLD = TSET, TC = -20 + 85°C)
SYMBOL PARAMETER AND CONDITIONS UNIT MIN TYP MAX
Tset Laser Set Temperature °C 30 45
VF Forward Voltage, Pf = 10 mW V 0.9 2.0
Ith Threshold Current mA 20 40
Pf Optical Output Power from Fiber, IF = Iop, TLD = Tset mW 10
Iop Operation Current mA 125
Pth Threshold Output Power, IF = Ith μW 100
η
λp
Δν
SMSR Side Mode Suppression Ratio, Pf = 10 mW, under modulation dB 30 35
ZIN Input Impedance
RIN Relative Intensity Noise, Pf = 10 mW, 20 MHz to 3 GHz dB/Hz −140
tr /tf Rise and Fall Time, 20-80%/80-20%, Tc = 25°C ps 120
S11
BW Band Width, −3 dB, Pf = 10 mW GHz 2.5
DP Dispersion Penalty, Tc = 25°C
Notes:
*1 Available for DWDM wavelengths based on ITU-T recommendation. Please refer to the ORDERING INFORMATION.
*2 2.48832 Gb/s, PRBS 223−1, duty cycle, Extinction Ratio ≥ 8.5 dB, BER = 10
NX8563LA: 4 320 ps/nm(240 km)
Quantum Efficiency, CW W/A 0.142 0.17
Peak Emission Wavelength, Pf = 10 mW, CW, TLD = Tset nm 1 530 ITU-T
Spectral Line Width, Pf = 10 mW, CW, 3 dB down MHz 1 5
Ω
Input Return Loss, f = 50 MHz to 3 GHz
f = 3 GHz to 6 GHz
*2
dB
dB 2.0
−10
, NX8563LAS: 1 800 ps/nm(100 km),
6
3
*1
25
1 562
NX8563LA Series
P
f
(mW)
0
Im
Im
TLD = Tset, TC = 25˚C
TLD = Tset, TC = –20 to +85˚C
(@ Pf (25˚C) = 10 mW)
10
P
f
ELECTRO-OPTICAL CHARACTERISTICS (Applicable to Monitor PD: TLD = TSET, TC = -20 to +85°C)
SYMBOL PARAMETER AND CONDITIONS UNIT MIN TYP MAX
Im Monitor Current, Pf = 10 mW, VR = 5 V μA 100 2 000
ID Dark Current, VR = 5 V nA 10
*1
γ
Tracking Error, Im = const. dB 0.6
Note:
*1 γ = 10 log
Pf
10 mW
ELECTRO-OPTICAL CHARACTERISTICS (Applicable to Thermistor and TEC: TLD = TSET, TC = -20 to +85°C)
SYMBOL PARAMETER AND CONDITIONS UNIT MIN. TYP. MAX.
R Thermistor Resistance, TLD = 25°C kΩ 9.5 10.0 10.5
B B Constant K 3 350 3 450 3 550
IC Cooler Current, ΔT = 85 − Tset, Pf = 10 mW A 1.2
VC Cooler Voltage, ΔT = 85 − Tset, Pf = 10 mW V 2.4
ABSOLUTE MAXIMUM RATINGS
(TC = 25°C, unless otherwise specified)
SYMBOL PARAMETER UNIT RATINGS
IF Forward Current of LD mA 300
VR Reverse Voltage of LD V 2.0
IF Forward Current of PD mA 10
VR Reverse Voltage of PD V 20
TC
Tstg Storage Temperature °C −40 to +85
Tsld
Note:
1. Operation in excess of any one of these parameters may result
in permanent damage.
Operating Case
Temperature
Lead Soldering
Temperature
1
°C −20 to +85
°C 260 (10 sec.)
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