DATA SHEET
The information in this document is subject to change without notice.
1996
Document No. P12438EJ3V0DS00 (3rd edition)
Date Published September 1997 NS
Printed in Japan
The mark
shows major revised points.
LASER DIODE
NDL7705P Series
1 500 nm OPTICAL FIBER COMMUNICATIONS
InGaAsP MQW-DFB LASER DIODE COAXIAL MODULE
DESCRIPTION
The NDL7705P Series is a 1 550 nm phase-shifted DFB (Distributed Feed-Back) laser diode module with optical
isolator. Multiple Quantum Well (MQW) structure is adopted to achieve stable dynamic single longitudinal mode
operation over wide temperature range of
40 to +85
C.
It is designed for all STM-1 and STM-4 applications.
FEATURES
Peak emission wavelength
p
= 1 550 nm
Optical output power
P
f
= 2.0 mW
Wide operating temperature range
T
C
=
40 to +85
C
/4-phase-shifted DFB
InGaAs monitor PIN-PD
Internal optical isolator
PACKAGE DIMENSIONS
in millimeters
NDL7705P
Optical Fiber
SM-9/125
Length: 1 m
4.60.8
201.0
27.81.0
3.40.8
8.2
15
3.20.25
0.9
70.2
0.45
0.05
60.1
PIN CONNECTIONS
4
1
3
2
PD
LD
Case
4 3
2
1
P.C.D. = 2
70.2
NDL7705P1
PIN CONNECTIONS
4
1
3
2
PD
LD
Case
7.20.3
1.00.1
3.70.3
4 3
2
1
P.C.D. = 2
15
201.0
27.81.0
4.00.2
12.70.2
17.00.2
Optical Fiber
SM-9/125
Length: 1 m
8.2
2.00.2
61.0
70.2
2 2.2
3.20.25
0.45
0.05
0.9
NDL7705P2
19.51.0
0.3
28.11.0
15
Optical Fiber
SM-9/125
Length: 1 m
0.50.2
0.3
2.51.0
8.2
70.2
3.20.25
0.9
4 0.45
0.05
PIN CONNECTIONS
PD
3
2
4
1
LD Case
70.2
120.15
16.0
4
3
2
1
P.C.D. = 2
2 2.5
16
2
NDL7705P Series
ORDERING INFORMATION
Part Number
Available Connector
Flange Type
NDL7705P
Without Connector
No flange
NDL7705PC
With FC-PC Connector
NDL7705PD
With SC-PC Connector
NDL7705P1
Without Connector
Flat Mount Flange
NDL7705P1C
With FC-PC Connector
NDL7705P1D
With SC-PC Connector
NDL7705P2
Without Connector
Vertical Mount Flange
NDL7705P2C
With FC-PC Connector
NDL7705P2D
With SC-PC Connector
ABSOLUTE MAXIMUM RATINGS (T
C
= 25
C, unless otherwise specified)
Parameter
Symbol
Ratings
Unit
Optical Output Power
P
f
5.0
mW
Forward Current of LD
I
F
I
th
+50
mA
Reverse Voltage of LD
V
R
2.0
V
Forward Current of PD
I
F
2.0
mA
Reverse Voltage of PD
V
R
15
V
Operating Case Temperature
T
C
40 to +85
C
Storage Temperature
T
stg
40 to +85
C
Lead Soldering Temperature (10 s)
T
sld
260
C
3
NDL7705P Series
ELECTRO-OPTICAL CHARACTERISTICS (T
C
=
40 to +85
C, unless otherwise specified)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Forward Voltage
V
F
I
F
= 30 mA
0.9
1.3
V
Threshold Current
I
th
T
C
= 25
C
15
mA
T
C
= 85
C
35
50
Differential Efficiency form Fiber
d
T
C
= 25
C
0.070
0.120
W/A
T
C
= 85
C
0.035
0.075
Temperature Dependence of
Differential Efficiency from Fiber
d
d
= 10 log
3
2
dB
Peak Emission Wavelength
p
P
f
= 1 mW
1 530
1 550
1 570
nm
Side Mode Suppression Ratio
SMSR
P
f
= 1 mW
30
dB
Rise Time
t
r
I
b
= 0.9
I
th
0.5
ns
Fall Time
t
f
I
b
= 0.9
I
th
0.5
ns
Monitor Current
I
m
V
R
= 5 V, P
f
= 2 mW
300
2 500
A
Monitor Dark Current
I
D
V
R
= 5 V, T
C
= 25
C
0.1
5
nA
Tracking Error
*1
I
m
= const. (P
f
= 2 mW, T
C
= 25
C)
1.0
dB
Relative Intensity Noise
RIN
Ref =
14 dB, P
f
= 1 mW
140
130
dB/Hz
*1
= 10 log
P
f
(mW)
2
P
f
0
I
m
I
m
T
C
= 25 C
T
C
= 40 to +85 C
(@ P
f
(25 C) = 2 mW)
d
(85
C)
d
(25
C)
P
f
2.0 mW
4
NDL7705P Series
TYPICAL CHARACTERISTICS (T
C
= 25
C, unless otherwise specified)
FORWARD CURRENT vs.
FORWARD VOLTAGE
Forward Current I
F
(mA)
Forward Voltage V
F
(V)
50
30
20
10
0
40
0.5
1.0
1.5
2.0
2.5
0.18
0.12
0.06
0.00
40
60
20
0
20
40
60
80
100
TEMPERATURE DEPENEDENCE OF
DIFFERENTIAL EFFICIENCY FROM FIBER
Case Temperature T
C
(C)
Differential Efficiency from Fiber
d
(W/A)
1 560
1 555
1 550
1 545
1 540
20
0
40
80
100
60
40
20
60
TEMPERATURE DEPENDENCE OF
PEAK EMISSION WAVELENGTH
Case Temperature T
C
(C)
Peak Emission Wavelength
p
(nm)
OPTICAL OUTPUT POWER vs.
FORWARD CURRENT
Optical Output Power P
f
(mW)
Forward Current I
F
(mA)
4.0
3.0
2.0
1.0
0
20
40
60
80
100
+25 C
+85 C
T
C
= 40 C
100
10
1
60
0
40
80
100
40
20
20
60
OPERATING CURRENT AND THRESHOLD
CURRENT vs. CASE TEMPERATURE
Case Temperature T
C
(C)
Operating Current I
op
(mA),
Threshold Current I
th
(mA)
I
th
I
op
@P
f
= 2 mW
OPTICAL OUTPUT POWER vs.
MONITOR CURRENT
Optical Output Power P
f
(mW)
Monitor Current I
m
(mA)
4.0
3.0
2.0
1.0
0.0
0.4
0.8
1.2
1.6
2.0
T
C
= 40 C
+25 C
+85 C
5
NDL7705P Series
LONGITUDINAL MODE FROM FIBER
Relative Intensity (dB)
Wavelength
(nm)
10
10
30
50
70
0
20
40
60
1 540.4
1 550.4
1 560.4
ERROR RATE CHARACTERISTICS
Bit Error Rate
Average Received Power P (dBm)
10
6
10
7
10
8
10
9
10
10
10
11
10
12
40 39 38 37 36 35 34 33
T
C
= 40 C,
Ref = 14 dB,
622 Mbps-NRZ,
2 V
p-p
,
I
b
= I
th
0.9
back to back
after 200 km
10
6
10
7
10
8
10
9
10
10
10
11
10
12
40 39 38 37 36 35 34 33
T
C
= 25 C,
Ref = 14 dB,
622 Mbps-NRZ,
2 V
p-p
,
I
b
= I
th
0.9
back to back
after 200 km
10
6
10
7
10
8
10
9
10
10
10
11
10
12
40 39 38 37 36 35 34 33
T
C
= 85 C,
Ref = 14 dB,
622 Mbps-NRZ,
2 V
p-p
,
I
b
= I
th
0.9
back to back
after 200 km
EYE DIAGRAM
Relative Intensity
Time Base (500 ps/div.)
622 Mb/s-NRZ, Ref = 14 dB,
2 V
p-p
(6 dB ATT), I
b
= I
th
0.9
6
NDL7705P Series
DFB-LD FAMILY FOR TELECOM
Absolute Maximum Ratings
Typical Characteristics
Part Number
T
C
(
C)
T
stg
(
C)
I
th
(mA)
P
f
(mW)
C
(nm)
SDH Application
Package
TYP.
MIN.
TYP.
NDL7603P Series
40 to +85
40 to +85
15
2
1 310
STM-4 : 622 Mb/s
Coaxial
NDL7620P Series
0 to +70
40 to +85
45 (MAX.)
2
1 310
STM-16: 2.5 Gb/s
Coaxial
NDL7701P Series
20 to +85
40 to +85
20
2
1 550
STM-4 : 622 Mb/s
Coaxial
NDL7705P Series
40 to +85
40 to +85
15
2
1 550
STM-4 : 622 Mb/s
Coaxial
NDL7740PA
20 to +65
40 to +85
40
20 (TYP.)
1 550
STM-16: 2.5 Gb/s
CW Light Source for
external modulator
BFY
NDL7910P
20 to +65
40 to +70
7
3 (TYP.)
1 550
STM-16: 2.5 Gb/s
EA modulator
integrate DFB-LD
BFY
7
NDL7705P Series
REFERENCE
Document Name
Document No.
NEC semiconductor device reliability/quality control system
C11159E
Quality grades on NEC semiconductor devices
C11531E
Semiconductor device mounting technology manual
C10535E
Guide to quality assurance for semiconductor devices
MEI-1202
Semiconductor selection guide
X10679E
NDL7705P Series
CAUTION
Within this device there exists GaAs (Gallium Arsenide) material which is a
harmful substance if ingested. Please do not under any circumstances break the
hermetic seal.
DANGER
INVISIBLE LASER RADIATION
AVOID DIRECT EXPOSURE TO BEAM
OUTPUT POWER mW MAX
WAVELENGTH nm
CLASS lllb LASER PRODUCT
AVOID EXPOSURE-Invisible
Laser Radiation is emitted from
this aperture
NEC Corporation
NEC Building, 7-1, Shiba 5-chome,
Minato-ku, Tokyo 108-01, Japan
Type number:
Manufactured:
Serial Number:
This product conforms to FDA
regulations as applicable
to standards 21 CFR Chapter 1.
Subchapter J.
SEMICONDUCTOR LASER
The export of this product from Japan is prohibited without governmental license. To export or re-export this product from
a country other than Japan may also be prohibited without a license from that country. Please call an NEC sales
representative.
No part of this document may be copied or reproduced in any form or by any means without the prior written
consent of NEC Corporation. NEC Corporation assumes no responsibility for any errors which may appear in this
document.
NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellectual
property rights of third parties by or arising from use of a device described herein or any other liability arising
from use of such device. No license, either express, implied or otherwise, is granted under any patents,
copyrights or other intellectual property rights of NEC Corporation or others.
While NEC Corporation has been making continuous effort to enhance the reliability of its semiconductor devices,
the possibility of defects cannot be eliminated entirely. To minimize risks of damage or injury to persons or
property arising from a defect in an NEC semiconductor device, customers must incorporate sufficient safety
measures in its design, such as redundancy, fire-containment, and anti-failure features.
NEC devices are classified into the following three quality grades:
"Standard", "Special", and "Specific". The Specific quality grade applies only to devices developed based on
a customer designated "quality assurance program" for a specific application. The recommended applications
of a device depend on its quality grade, as indicated below. Customers must check the quality grade of each
device before using it in a particular application.
Standard: Computers, office equipment, communications equipment, test and measurement equipment,
audio and visual equipment, home electronic appliances, machine tools, personal electronic
equipment and industrial robots
Special: Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster
systems, anti-crime systems, safety equipment and medical equipment (not specifically designed
for life support)
Specific: Aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life
support systems or medical equipment for life support, etc.
The quality grade of NEC devices is "Standard" unless otherwise specified in NEC's Data Sheets or Data Books.
If customers intend to use NEC devices for applications other than those specified for Standard quality grade,
they should contact an NEC sales representative in advance.
Anti-radioactive design is not implemented in this product.
M4 96. 5
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