HL6738MG
Visible High Power Laser Diode
ADE-208-601B (Z)
3rd Edition
May 1998
Description
The HL6738MG is a 0.68
m band AlGaInP laser diode (LD) with a multi-quantum well (MQW) structure.
It is suitable as a light source for large capacity optical disc memories and various other types of optical
equipment.
Hermetic sealing of the small package (
5.6 mm) assures high reliability.
Application
Optical disc memories
Optical equipment
Features
High output power
: 35 mW (CW)
Visible light output
:
p = 680 to 695 nm
Small package
:
5.6 mm
Low astigmatism
: 6
m Typ (P
O
= 5 mW)
LD
PD
1
3
Internal Circuit
Package Type
HL6738MG: MG
2
HL6738MG
2
Absolute Maximum Ratings (T
C
= 25
C)
Item
Symbol
Value
Unit
Optical output power
P
O
35
mW
Pulse optical output power
P
O
(pulse)
50 *
mW
Laser diode reverse voltage
V
R
(LD)
2
V
Photo diode reverse voltage
V
R (PD)
30
V
Operating temperature
Topr
10 to +70
C
Storage temperature
Tstg
40 to +85
C
Note:
Pulse condition : Pulse width = 100 ns, duty = 50%
Optical and Electrical Characteristics (T
C
= 25
C)
Item
Symbol
Min
Typ
Max
Unit
Test Conditions
Optical output power
P
O
35
--
--
mW
Kink free *
Pluse optical output power
P
O(pulse)
50
--
--
mW
Kink free *
Threshold current
Ith
30
45
70
mA
--
Operating voltage
V
OP
2.1
2.5
2.8
V
P
O
= 30 mW
Slope efficiency
s
0.5
0.7
0.9
mW/mA
18(mW) / (I
(24mW)
I
(6mW)
)
Lasing wavelength
p
680
690
695
nm
P
O
= 30 mW
Beam divergence parallel
to the junction
//
7
8.5
10.5
deg.
P
O
= 30 mW
Beam divergence
parpendicular to the junction
17
19
23
deg.
P
O
= 30 mW
Monitor current
I
S
0.02
0.1
0.45
mA
P
O
= 30 mW, V
R (PD)
= 5 V
Asitgmatism
A
S
--
6
--
m
P
O
= 5 mW, NA = 0.55
Note:
Kink free is confirmed at the temperature of 25
C.
HL6738FM
3
Curve Characteristics
0
200
160
120
80
40
50
40
30
Optical Output Power P
O
(mW)
20
10
0
Forward Current I
F
(mA)
Optical Output Power vs. Forward Current
Slope Efficiency
S
(mW/mA)
Case Temperature T
C
(
C)
Slope Efficiency vs. Case Temperature
60
1.0
0.8
0.6
0.4
0.2
0
0
10
50
40
30
20
T
C
= 60
C
T
C
= 25
C
T
C
= 0
C
T
C
= 70
C
Threshold Current Ith (mA)
Case Temperature T
C
(
C)
Threshold Current vs. Case Temperature
60
0
10
50
40
30
20
100
10
70
80
80
70
0.5
0.4
0.3
Monitor Current I
S
(mA)
0.2
0.1
Optical Output Power P
O
(mW)
Monitor Current vs. Optical Output Power
0
50
40
30
20
10
0
V
R (PD)
= 5V
T
C
= 25
C
HL6738MG
4
Lasing Wavelength
p (nm)
Case Temperature T
C
(
C)
Lasing Wavelength vs. Case Temperature
685
695
690
Relative Intensity
Lasing Wavelength
p (nm)
Lasing Spectrum
1000
800
600
Polarization Ratio
400
200
Optical Output Power P
O
(mW)
Polarization Ratio vs. Optical Output Power
0
50
40
30
20
10
0
T
C
= 25
C
NA = 0.55
T
C
= 25
C
0
60
10
50
40
30
20
705
700
695
690
685
680
P
O
= 30mW
P
O
= 30mW
P
O
= 20mW
P
O
= 10mW
P
O
= 5mW
80
70
Monitor Current I
S
(mA)
Case Temperature T
C
(
C)
Monitor Current vs. Case Temperature
0
60
1.0
0.8
0.6
0.4
0.2
0
P
O
= 30mW
V
R (PD)
= 5V
10
50
40
30
20
70 80
HL6738FM
5
0
1
2
100
80
60
40
20
0
Applied Voltage (kV)
Electrostatic Destruction (MILstandard)
Gain (dB)
Frequency (Hz)
Frequency Response
1M
100M
3G
10M
Forward
N = 10pcs
judgement
I
O
10%
4
3
P
O
= 3mW
3dB/div
1G
Survival Rate (%)
Relative Intensity
Angle
(deg)
Far Field Pattern
-
40
-
10
0
10
20
30
-
20
-
30
40
1.0
0.8
0.6
0.4
0.2
0
P
O
= 30mW
T
C
= 25
C
Perpendicular
Parallel
Astigmatism A
S
(
m)
Optical Output Power P
O
(mW)
Astigmatism vs. Optical Output Power
0
50
40
30
20
10
10
6
4
2
0
T
C
= 25
C
NA = 0.55
8
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