NEC'S EA MODULATOR
INTEGRATED InGaAsP MQW DFB
LASER DIODE MODULE
FOR 2.5 Gb/s ULTRALONG-REACH
360, 600, 240 km DWDM APPLICATIONS
NX8564/
NX8565/
NX8566LE
Series
NEC's NX8564/8565/8566LE Series are Electro-Absorption
(EA) mod u la tor integrated, 1550 nm Multiple Quantum Well
(MQW) struc tured Distributed Feed-Back (DFB) laser diodes.
The mod ule is capable of 2.5 Gb/s applications of over 360, 600,
240 km ultralong-reach and available for Dense Wavelength
Division Multoplexing (DWDM) wavelenghts based on ITU-T
rec om men da tions, enabling a wide range of applications.
DESCRIPTION
• INTEGRATED ELECTROABSORPTION MODULATOR
• VERY LOW DISPERSION PENALTY
NX8564LE-BC/CC - over 360 km (6480 ps/nm)
NX8565LE-BC/CC - over 600 km (10800 ps/nm)
NX8566LE-BC/CC - over 240 km (4320 ps/nm)
• LOW MODULATION VOLTAGE
• AVAILABLE FOR DWDM WAVELENGHT BASED ON
ITU-T RECOMMENDATION (100 GHz grid, refer to
ordering information)
FEATURES
California Eastern Laboratories
PART NUMBER NX8564/8565/8566LE SERIES
SYMBOLS PARAMETERS AND CONDITIONS UNITS MIN TYP MAX
TSET Laser Set Temperature1°C 20 35
IOP Operating Current mA 50 60 100
Vcenter Modulation Center Voltage2V -1.5 -1.2 -0.5
Vmod Modulation Voltage2V–23
VFLD For ward Voltage of LD, IFLD = IOP V–1.6 2.0
ITH Thresh old Current mA – 7 20
PfOptical Output Power from Fiber,
IFLD = IOP, Under modulation2
(NX8564/65LE Series) dBm
-5 -2 –
IFLD = IOP, Under modulation2
(NX8566LE Series) 01–
λPPeak Emission Wavelength, IFLD = IOP, VEA = 0 V nm
1530 SpeciÞ ed to
ITU-T3
1563
1574 1609
SMSR Side Mode Suppression Ratio, IFLD = IOP, VEA = 0 V dB 30 >37 –
ER Extinction Ratio, IFLD = IOP, Under modulation2dB 10 >11 –
tfRise Time, IFLD = IOP, 20-80%, Under modulation2ps – 70 125
trRise Time, IFLD = IOP, 80-20%, Under modulation2ps – 70 125
ELECTRO-OPTICAL CHARACTERISTICS (TLD = Tset, TC = -20 to +70°C, unless otherwise speciÞ ed)
Notes:
1. NX8564/65/66LE Series : Tset is a certain point between 20 and 35°C
NX8564/65/66LExxx Series : Tset is a certain point between 20 and 35C for ITU-T grid wavelength
2. NX8564LE: C-band 360 km, L-band 288 km (6480 ps/nm) SMF under modulation
NX8564LE: C-band 360 km, L-band 288 km (6480 ps/nm) SMF under modulation
NX8564LE: C-band 360 km, L-band 288 km (6480 ps/nm) SMF under modulation
2.48832 Gb/s, PRBS 223 -1, VEA = Vcenter ±1/2 Vmod, IFLD = Iop, TLD = Tset, NEC Test System
Vcenter : a certain point between -1.5 and -0.5 V
Vmod : a certain point 3 V or below
Iop : 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.
NX8564/8565/8566LE SERIES
ELECTRO-OPTICAL CHARACTERISTICS (TLD = 25°C, TC = -20 to +70°C)
Note:
1. Tracking error: γ
P
f
(mW) T
LD
= T
C
= 25°C
(at P
f
(25°C) = P
op
)
T
LD
= 25°C, T
C
= -20 to +70°C
P
op
0
P
f
I
m
I
m
Pf
γ = 10 log
POP [dB]
PART NUMBER NX8564/8565/8566LE SERIES
SYMBOLS PARAMETERS AND CONDITIONS UNITS MIN TYP MAX
DP Dispension Penalty, IFLD = IOP, SMF Under modulation2,4 dB <1.5 2
ISIsolation dB 23
RIN Relative Intensity Noise10 MHz to 10 GHz, VRM = 0 V, TLD, IOP dB <-135 -130
S11 Input Return Loss IFLD = IOP, VEA = -1 V, 50 Ω
130 MHz to 2 GHz
dB -8
IFLD = IOP, VEA = -1 V, 50 Ω
2 GHz to 2.5 GHz
-5
Notes:
2. NX8564LE: C-band 360 km, L-band 288 km (6480 ps/nm) SMF under modulation
NX8564LE: C-band 360 km, L-band 288 km (6480 ps/nm) SMF under modulation
NX8564LE: C-band 360 km, L-band 288 km (6480 ps/nm) SMF under modulation
2.48832 Gb/s, PRBS 223 -1, VEA = Vcenter ±1/2 Vmod, IFLD = Iop, TLD = Tset, NEC Test System
Vcenter : a certain point between -1.5 and -0.5 V
Vmod : a certain point 3 V or below
Iop : a certain point between 50 and 80 mA
4. BER 10-10
SYMBOLS PARAMETERS AND CONDITIONS UNITS MIN TYP MAX
Applicable to Monitor PD, (TLD = Tset, TC = -20 to +70°C)
ImMonitor Current, IFLD = IOP, VEA = 0 V µA20100 1000
IDDark Current, VRPD = 5 V, VEA = 0 V nA 10
γ1Tracking Error, Im = const. dB 0.5
CtTerminal Capacitance, VRPD = 5 V, f = 1 MHz pF 15
Applicable to Thermistor and TEC, (TLD = Tset, TC = -20 to +70°C)
R Thermistor Resistance, TLD = 25°C kΩ9.5 10.0 10.5
BB Constant K 3350 3450 3550
ICCooler Current A 1.2
VCCooler Voltage V 2.4
Note:
1. Operation in excess of any one of these parameters may result
in permanent damage.
ABSOLUTE MAXIMUM RATINGS1
(TC = 25°C, unless otherwise speciÞ ed)
SYMBOLS PARAMETERS UNITS RATINGS
PfOptical Output Power from Fiber mW 10
IFLD Forward Current of LD mA 150
VRLD Reverse Voltage of LD V 2.0
VFm Forward Voltage of Modulator V 1
VRm Reverse Voltage of Modulator V 5
IFPD Forward Current of PD mA 1
VRPD Reverse Voltage of PD V 10
ICCooler Current A 1.5
VCCooler Voltage V 2.5
TCOperating Case Temperature °C -20 to +70
TSTG Storage Temperature °C -40 to +85
TSLD Lead Soldering Temp. (10 s) °C 260
NX8564/8565/8566LE SERIES
ORDERING INFORMATION
NX8564/8565/8566LE SERIES
Wavelength Code ITU-T Wavelength *1
(nm)
Frequency
(THz)
Wavelength Code ITU-T Wavelength *1
(nm)
Frequency
(THz)
287 1528.77 196.10 485 1548.51 193.60
295 1529.55 196.00 493 1549.31 193.50
303 1530.33 195.90 501 1550.11 193.40
311 1531.11 195.80 509 1550.91 193.30
318 1531.89 195.70 517 1551.72 193.20
326 1532.68 195.60 525 1552.52 193.10
334 1533.46 195.50 533 1553.32 193.00
342 1534.25 195.40 541 1554.13 192.90
350 1535.03 195.30 549 1554.94 192.80
358 1535.82 195.20 557 1555.74 192.70
366 1536.60 195.10 565 1556.55 192.60
373 1537.39 195.00 573 1557.36 192.50
381 1538.18 194.90 581 1558.17 192.40
389 1538.97 194.80 589 1558.98 192.30
397 1539.76 194.70 597 1559.79 192.20
405 1540.55 194.60 606 1560.60 192.10
413 1541.34 194.50 614 1561.41 192.00
421 1542.14 194.40 622 1562.23 191.90
429 1542.93 194.30 630 1563.04 191.80
437 1543.73 194.20
445 1544.52 194.10
453 1545.32 194.00
461 1546.11 193.90
469 1546.91 193.80
477 1547.71 193.70
NX856 LE -
CC: SC-UPC connector
BC: FC-UPC connector (option)
Without wavelength code: Wavelength is a certain point between
1528.77 to 1563.04 nm
With wavelength code : Refer to Table A
4: 360 km (6480 ps/nm)
5: 600 km (10800 ps/nm)
6: 240 km (4320 ps/nm)
TABLE A: DWDM wavelengths based on ITU-T recommendations (@ TLD = Tset)
Note:
1. The value which omitted and computed the 3rd place below the decimal point.
Extinction Ratio ER (dB)
EXTINCTION RATIO vs.
MODULATION VOLTAGE (CW)
Modulation Voltage (CW) VRmpp (V)
0
0
10
15
20
25
5
123
OPtical Output Power from Fiber (CW), Pf (mW)
OPTICAL OUTPUT POWER FROM
FIBER (CW) vs. FORWARD CURRENT
Frequency, IF (mA)
Forward Current IF (mA)
FORWARD CURRENT vs.
FORWARD VOLTAGE
Frequency Voltage VF, (V)
050100 150
1.0
2.0
3.0
4.0
150
100
50
0 0.5 1.0 1.5 2.0
TYPICAL PERFORMANCE CURVES (TLD = +25°C, Unless otherwise speciÞ ed)
NX8564/8565/8566LE SERIES
Forward Current IF (mA)
THERMISTOR RESISTANCE vs.
AMBIENT TEMPERATURE
Ambient Temperature TA (ºC)
50
30
20
10
5
3
2
1
01020304050 6070
75
Relative Intensity
LONGITUDINAL MODE
Wavelenght λ (nm)
0
-10
-20
-30
-40
-50
-60
1540.0 1545.0 1555.0 15550 1560.0
Remark:The graphs indicate nominal characteristics.
600 km STANDARD FIBER TRANSMISSION EX AM PLE (NX8565LE SERIES)
Remark:The graphs indicate nominal characteristics.
TEST SETUP
NX8564/8565/8566LE SERIES
EYE DIAGRAM
Back to Back (100 ps/div.)
Relative Intensity (20 mV/div.)
After 600 km (100 ps/div.)
Relative Intensity (10 mV/div.)
EYE DIAGRAM
-40 -38 -36 -34 -32
10-6
10-7
10-8
10-9
10-10
10-11
10-12
ERROR RATE CHARACTERISTICS
Bit Error Rate
Received Power, P (dBm)
-42
10-5
10-4
10-13
back to back
after 600 km
-30 -28
2.48832 Gb/s,
NRZ 2 V
P-P
,
PRBS 2
23
-1,
I
op
= 70 mA,
T
C
= 25°C,
V
center
= -1.2 V,
V
mod
= 2.0 V
TX
RX
EDFA
120 km 120 km
120 km 120 km
120 km
2.5 Gb/s
EDFA
EDFA
EDFA
EDFA
EDFA
OUTLINE DIMENSIONS (Units in mm)
OPTICAL FIBER CHARACTERISTICS
PARAMETER UNITS SPECIFICATION
Mode Field Diameter µm 9.3±0.5
Cladding Diameter µm 125±1
Tight Buffer Diameter µm 900±100
Cut-off Wavelenght nm < 1270
Attenuation 1525 to 1575 nm dB/km < 0.3
Minimum Fiber Bending
Radius
mm 30
Fiber Length mm 1225 MIN
Flammability UL1581VW-1
05/16/2003
Life Support Applications
These NEC products are not intended for use in life support devices, appliances, or systems where the malfunction of these products can reasonably be expected
to result in personal injury. The customers of CEL using or selling these products for use in such applications do so at their own risk and agree to fully indemnify
CEL for all damages resulting from such improper use or sale.
NX8564/8565/8566LE SERIES
Pin
No.
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Function Function
PIN CONNECTIONS
GND
GND
NC
GND
Signal Input (MOD),
50 Ω RF Input
GND
GND
Thermistor
Thermistor
LD DC Bias
PD Anode
PD Cathode
Cooler Anode
Cooler Cathode
TOP VIEW
#8 #14
#7 #1
+ PD
LD MOD
Cooler
Thermistor
Optical Fiber (SMF)
Length : 1 000 MIN.
29.97–0.25
8.0
0.75
5.4
8.0
Nose
Fiber
20.83–0.13
26.04–0.13
7
8
1
14
1.25
15.24
2.54
4 2.67
φ
22.0 MAX.
12.7–0.15
10 MIN.
8.89–0.13
0.9
6.0 MAX.
-CC : SC-UPC connector
-BC : FC-UPC connector
Fiber Length: 1 000 mm MIN.
35±2 mm
8.99±0.5 mm
