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Rohm Semiconductor Electronic Components Datasheet

RLD78MYA1 Datasheet

CD players/ CD-ROM laser diode

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RLD78MYA1 pdf
Laser diodes
RLD78MYA1
CD players, CD-ROM laser diode
RLD78MYA1
Though it is an open type package, by using a metal cap, pressing structure correspondence and protection of a laser
element are enabled, and reliability is secured.
!Applications
Compact disc players
CD-ROM
!Features
1) φ5.6 metal shell type open package.
2) A laser element is protected by using a metal cap.
3) Interchangeability reservation with φ5.6 metal
package of an industry standard.
!External dimensions (Units : mm)
2.4±0.1 2.6±0.1
1
3
2
Sub-mount
φ1.6 LD Chip
!Absolute maximum ratings (Tc=25°C)
Parameter
Output
Laser
PIN photodiode
Operating temperature
Storage temperature
Symbol
PO
VR
VR (PIN)
Topr
Tstg
Limits
5
2
30
10 to +70
40 to +85
Unit
mW
V
V
°C
°C
3-φ0.45
1/3


Rohm Semiconductor Electronic Components Datasheet

RLD78MYA1 Datasheet

CD players/ CD-ROM laser diode

No Preview Available !

RLD78MYA1 pdf
Laser diodes
RLD78MYA1
!Electrical and optical characteristics (Tc=25°C)
Parameter
Symbol Min. Typ. Max. Unit
Conditions
Threshold current
Operating current
Operating voltage
Ith 35 60 mA
Iop 45 70 mA Po=3mW
Vop
1.9 2.3
V Po=3mW
Differential efficiency
η
0.1
0.25
0.6
mW/mA
2mW
I(3mW)I(1mW)
Monitor current
Parallel divergence angle
Perpendicular divergence angle
Parallel deviation angle
Im
θ//
θ
∆φ//
0.05
8
20
0.15
11
37
0.3
15
45
±2
mA Po=3mW,VR(PIN)=15V
deg
deg
Po=3mW
deg
Perpendicular deviation angle
∆φ− − ±3 deg
Emission point accuracy
X
Y − − ±100 µm
Z
Peak emission wavelength
λ 770 785 810 nm Po=3mW
Signal-to-noise ratio
S / N 60 − − dB f=720kHz, f=10kHz
∗θ// and θare defined as the angle within which the intensity is 50% of the peak value.
!Electrical and optical characteristic curves
5
10°C
0°C
4 25°C
40°C
60°C
70°C
3 75°C
100
90
80
70
60
50
40
30
2
20
1
0
10 20 30 40 50 60 70 80
OPERATING CURRENT : IF (mA)
Fig.1 Optical output vs.operating current
10
-10 0 10 20 30 40 50 60 70 80
PACKAGE TEMPERATURE : TC (°C)
Fig.2 Dependence of threshold
current on temperature
1.0
θ direction
θ direction
0.5
0
-40 0
ANGLE (deg)
Fig.3 Far field pattern
40
800
790
780
770
-10 0 10 20 30 40 50 60 70 80
PACKAGE TEMPERATURE : Tc (°C)
Fig.4 Dependence of wavelength
on temperature
TC=25°C
PO=2.5mW
PO=2mW
PO=1mW
775 780 785 790
WAVELENGTH : λ (nm)
Fig.5 Dependence of emission
spectrum on optical output
5
4
3
2
1
0
0.1 0.2 0.3 0.4 0.5
MONITOR CURRENT : Im (mA)
Fig.6 Monitor current vs.optical output
2/3


Part Number RLD78MYA1
Description CD players/ CD-ROM laser diode
Maker Rohm
Total Page 4 Pages
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