NEC's InGaAsP
MQW-DFB LASER MODULE
IN COAXIAL PACKAGE FOR
2.5 Gb/s, CWDM APPLICATIONS
NX8508
Series
FEATURES
INTERNAL OPTICAL ISOLATOR
PEAK EMISSION WAVELENGTH
p
= 1 470 to 1 610 nm (Based on CWDM)
OPTICAL OUTPUT POWER
P
f
= 2.0 mW
OPERATING CASE TEMPERATURE RANGE
T
C
=
-20 to +85C
SIDE MODE SUPPRESSION RATIO
SMSR = 40 dB
InGaAs MONITOR PIN-PD
WITH SC-UPC CONNECTOR
BASED ON TELCORDIA RELIABILITY
NEC'S NX8508 Series are 1 470 to 1 610 nm Multiple Quantum
Well (MQW) structured Distributed Feed-Back (DFB) laser
diode coaxial modules with an internal optical isolator.
These devices are ideal for 2.5 Gb/s CWDM application.
DESCRIPTION
California Eastern Laboratories
PRELIMINARY DATA SHEET
ELECTRO-OPTICAL CHARACTERISTICS
(T
C
= -20 to +85C, unless otherwise specified)
PART NUMBER
NX8508 SERIES
SYMBOLS
PARAMETER AND CONDITIONS
UNIT
MIN.
TYP.
MAX.
P
f
Optical Output Power from Fiber, CW, T
C
= 25C, I
F
= I
th
+ 20 mA
mW
2.0
V
op
Operating Voltage, CW, P
f
= 2.0 mW
V
1.1
1.6
I
th
Threshold Current, T
C
= 25C
mA
10
20
50
P
th
Threshold Output Power, I
F
= I
th
W
100
d
Differential Efficiency
P
f
= 2.0 mW, T
C
= 25C
W/A
0.07
0.1
P
f
= 2.0 mW
0.04
d
Temperature Dependence of Differential Efficiency
d
= 10 log
d
(@ T
C
C)
d
(@ 25C)
dB
-
3.0
-
1.6
p
Peak Emission Wavelength, CW, P
f
= 2.0 mW, T
C
= 25C
nm
p
-
2
p
*1
p
+2
/T
Temperature Dependence of Peak Emission Wavelength, CW
nm/C
0.08
0.10
0.12
SMSR
Side Mode Suppression Ratio, P
f
= 2.0 mW
dB
30
40
t
r
Rise Time, 20-80%, P
f
= 2.0 mW
ps
100
Continued on next page
NX8508 Series
ELECTRO-OPTICAL CHARACTERISTICS
(T
C
= -25 to +85C, unless otherwise specified)
PART NUMBER
NX8508 SERIES
SYMBOLS
PARAMETER AND CONDITIONS
UNIT
MIN.
TYP.
MAX.
t
f
Fall Time, 80-20%, P
f
= 2.0 mW
ps
150
I
m
Monitor Current, V
R
= 1.5 V, P
f
= 1.0 mW
A
100
500
1 000
I
D
Monitor Dark Current
V
R
= 1.5 V, T
C
= 25C
nA
0.1
10
V
R
= 1.5 V
10
100
Tracking Error
*2
, I
m
= const.
dB
-
1.0
1.0
*1 Available Available for CWDM Wavelengths based on ITU-T recommendations
p
= 1 470, 1 490, 1 510, 1 530, 1 550, 1 570, 1 590, 1 610 nm
Please refer to
Table A.
Table A: CWDM wavelength code
(@ T
C
= 25C)
WAVELENGTH
CODE
MIN. (nm)
TYP. (nm)
MAX. (nm)
47
1 468
1 470
1 472
49
1 488
1 490
1 492
51
1 508
1 510
1 512
53
1 528
1 530
1 532
55
1 548
1 550
1 552
57
1 568
1 570
1 572
59
1 588
1 590
1 592
61
1 608
1 610
1 612
*2 Tracking Error:
0
I
m
I
m
T
C
= 25C
T
C
= -20 to +85C
P
f
(mW)
P
f
2.0
(mA)
= 10 log
[dB]
P
f
2.0
NX8508 Series
SYMBOL
PARAMETER
UNIT
RATINGS
P
f
Optical Output Power
from Fiber
mW
5
I
F
Forward Current of LD
mA
150
V
R
Reverse Voltage of LD
V
2.0
I
F
Forward Current of PD
mA
2.0
V
R
Reverse Voltage of PD
V
15
T
C
Operating Case
Temperature
C
-20 to +85
T
stg
Storage Temperature
C
-
40 to +85
ABSOLUTE MAXIMUM RATINGS
1
NX8508BMxx
*1
-CC
7.00.2
8.00.3
2.2
3.
2
20.41.
0
27.61.
0
2.2
20.01.
0
1.20.2
6.
0
12.70.2
17.00.2
0.9
4.00.2
0.450.05
Optical Fiber (SMF)
With SC Connector
NX8508CGxx
*1
-CC
7.00.2
8.00.3
15.
0
7.3
28.31.
0
19.51.0
6.
0
16.0
0.9
0.450.05
0.50.2
0.5
Optical Fiber (SMF)
With SC Connector
PIN CONNECTIONS
4
1
3
2
PD
LD
Case
P.C.D. = 2.0
8.50.2
4R1.250.2
12.00.15
7.00.2
1
2
3
4
2 2.5
PIN CONNECTIONS
4
1
3
2
PD
LD
Case
P.C.D. = 2.0
1.00.
1
7.20.
3
3.70.
3
1
2
3
4
*1 Please refer to ORDERING INFORMATION.
PACKAGE DIMENSIONS
(Units in mm)
NX8508 Series
PARAMETER
SPECIFICATION
UNIT
Mode Field Diameter
9.51
m
Cladding Diameter
1252
m
Maximum Cladding
Noncircularity
2
%
Maximum Core/Cladding
Concentricity
1.6
%
Outer Diameter
0.90.1
mm
Cut-off Wavelength
1 100 to 1 270
nm
Minimum Fiber Bending Radius
30
mm
Fiber Length
1 000100
mm
Flammability
UL1581 VW-1
OPTICAL FIBER CHARACTERISTICS
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.
A Business Partner of NEC Compound Semiconductor Devices, Ltd.
05/03/2004
SC-UPC Connector
Fiber Length: 1 000100 mm
352 mm
8.990.5 mm
PART NUMBER
FLANGE TYPE
AVAILABLE
CONNECTOR
NX8508BMxx-CC-AZ*
Flat Mount Flange
With SC-UPC
Connector
NX8508CGxx-CC-AZ*
Vertical Mount Flange
ORDERING INFORMATION
Connector code : With SC-UPC connector
Wavelength code : Refer to Table A
Package code
: Refer to PACKAGE DIMENSIONS
NX8508
xx-CC
*NOTE:
Please refer to the last page of this data sheet, "Compliance with EU Directives" for Pb-Free RoHS Compliance Infomation.
4590 Patrick Henry Drive
Santa Clara, CA 95054-1817
Telephone: (408) 919-2500
Facsimile: (408) 988-0279
Subject: Compliance with EU Directives
CEL certifies, to its knowledge, that semiconductor and laser products detailed below are compliant
with the requirements of European Union (EU) Directive 2002/95/EC Restriction on Use of Hazardous
Substances in electrical and electronic equipment (RoHS) and the requirements of EU Directive
2003/11/EC Restriction on Penta and Octa BDE.
CEL Pb-free products have the same base part number with a suffix added. The suffix A indicates
that the device is Pb-free. The AZ suffix is used to designate devices containing Pb which are
exempted from the requirement of RoHS directive (*). In all cases the devices have Pb-free terminals.
All devices with these suffixes meet the requirements of the RoHS directive.
This status is based on CEL's understanding of the EU Directives and knowledge of the materials that
go into its products as of the date of disclosure of this information.
Restricted Substance
per RoHS
Concentration Limit per RoHS
(values are not yet fixed)
Concentration contained
in CEL devices
-A
-AZ
Lead (Pb)
< 1000 PPM
Not Detected
(*)
Mercury
< 1000 PPM
Not Detected
Cadmium
< 100 PPM
Not Detected
Hexavalent Chromium
< 1000 PPM
Not Detected
PBB
< 1000 PPM
Not Detected
PBDE
< 1000 PPM
Not Detected
If you should have any additional questions regarding our devices and compliance to environmental
standards, please do not hesitate to contact your local representative.
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content of its products represents knowledge and belief as of the date that it is provided. CEL bases its knowledge and belief on information
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