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Rohm Semiconductor Electronic Components Datasheet

RLD78PZW4 Datasheet

AlGaAs laser diode

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RLD78PZW4 pdf
Laser Diodes
AlGaAs laser diode
RLD78PZW4
RLD78PZW4
The RLD78PZW4 is infrared laser diode high power output type (pulse 230mW). This is the best for optical disk drive use,
such as CD-R / RW.
!Applications
Max. ×52 speed CD-R / RW drives.
!Features
1) Absolute maximum optical power output : pulse 230mW
2) Wave length : Typ. 784nm
3) φ5.6mm small packages
!External dimensions (Unit : mm)
0.4±0.1
90°±2°
φ5.6
+0
0.025
Glass window
Chip
Equivalent circuit diagram
P (3)
t
y
L.D.
p
e (1) (2)
3−φ0.45
(3) (2)
(1)
!Absolute maximum ratings (Tc=25°C)
Parameter
Symbol
Output
PO
Reverse
voltage
Raser
PIN photodiode
Operating temperature
Storage temperature
VR
VR(PIN)
Topr
Tstg
Limits
Pulsed 230
Pulse condition : pulse 70nsec,
Duty50%
2
10 to +75 (Pulsed)
40 to +85
Unit
mW
V
°C
°C
1/2


Rohm Semiconductor Electronic Components Datasheet

RLD78PZW4 Datasheet

AlGaAs laser diode

No Preview Available !

RLD78PZW4 pdf
Laser Diodes
RLD78PZW4
!Electrical and optical characteristics (Tc=25°CCW)
Parameter
Threshold current
Operating current
Operating voltage
Differential efficiency
Parallel divergence angle
Perpendicular divergence angle
Parallel deviation angle
Perpendicular deviation angle
Emission point accuracy
Symbol
Ith
Iop
Vop
η
θ //
θ
∆φ //
∆φ
X
Y
Z
Min. Typ. Max. Unit
Conditions
30 50 mA
133 165 mA
2.1 2.5
V
0.7 0.9 1.4 mW / mA
8 9 10 deg PO=90mW
15 17 19 deg
2 0 +2 deg
3 0 +3 deg
80 0 +80 µm
Peak emission wavelength
λ 779 784 789 nm
Astigmatism
− − 6 µm
∗ θ // and θ are defined as the angle within which the intensity is 50% of the peak value.
PO=90mW
NA=0.15, PO=90mW
!Electrical and optical characteristics curves
250
Tc=25°C
Tc=50°C
200 Tc=70°C
Tc=90°C
150
100
50
6
5
4
3
2
1
0
0
0
100 200 300 400
OPERATING CURRENT : IF (mA)
Fig.1 Optical output
vs. operating current
20
18
16
14
12
10
8
6
4
2
00
20 40 60 80
PO (mW)
Fig.2 PO vs. FFP
100
800
795
790
785
780
775
770
0
20 40 60 80 100
PACKAGE TEMPERATURE : TC (°C)
Fig.3 Dependence of wavelength
on temperature
2/2


Part Number RLD78PZW4
Description AlGaAs laser diode
Maker Rohm
Total Page 3 Pages
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