Hologram Lasers
s
❇1
❇2
❇3
❇4
❇5
❇6
GH7C605B5A/GH7C605B5B
(V
CC
=5V, V
S
=2.1V, T
C
=25˚C)
Conditions
V
RF
=1.1V
V
RF
=1.1V
P
H
=3.0mW
P
H
=3.0mW
V
RF
=1.1V
V
RF
=1.1V
−
P
H
=3.0mW
P
H
=3.0mW
P
H
=3.0mW
P
H
=3.0mW, V
R
=15V
2.0mW
I(3.0mW)-I(1.0mW)
❇3
Electro-optical Characteristics
Parameter
Focal offset
Focal error symmetry
Radial error balance
RF output amplitude
FES output amplitude
RES output amplitude
Threshold current
Operating current
Operating voltage
Wavelength
Output current
Differential efficiency
GH7C605B5A
GH7C605B5B
Symbol
DEF
B
FES
B
RES
V
RF
V
FES
V
RES
I
th
I
op
V
op
λ
p
I
m
η
d
MIN.
-0.7
-25
-25
0.67
0.28
0.08
-
-
-
770
0.06
0.05
-
TYP.
-
-
-
1.60
0.43
0.15
25
36
1.85
780
0.32
0.22
0.27
MAX.
+0.7
+25
+25
-
0.59
0.20
39
50
2.2
795
0.60
0.60
-
Unit
µm
%
%
V
V
V
mA
mA
V
nm
mA
mA
mW/mA
❇1
❇2
Distance between FES=0 and jitter minimum point
At the condition of FES sensitivity = 20%/1µm
(a–b) / (a+b)
a–b
2◊(a+b)
a (+amplitude of RES)
a (+amplitude of FES)
GND
b (–amplitude of RES)
b (–amplitude of FES)
❇4
❇5
❇6
Amplitude of V
RF
(focal servo ON, radial servo ON)
V
A
–V
B
(Focal vibration)
V
E
–V
F
(focal servo ON, radial servo OFF)
Collimated lens
Laser driver
APC circuit
Hologram laser
NA=0.11
f =20.6mm
Actuator
Disc
(SONY : YEDS-18)
NA=0.50
f =4.5mm
Measuring System of Hologram Laser
92
Notice
Internet
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devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
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