121
Hologram Lasers
Notice
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GH5R41KA3C
■
Electro-optical Characteristics
Parameter
(T
C
=25
C)
Symbol
MAX.
Unit
1
Focal offset
DEF
+0.7
μ
m
6
RES output amplitude
V
RES
0.3
V
Jitter
JIT
23
ns
Conditions
MIN.
TYP.
Collimated lens output power
1.5mW, High gain
Collimated lens output power
1.5mW, High gain
Collimated lens output power
1.5mW, High gain
Collimated lens output power
1.5mW, High gain
Collimated lens output power
1.5mW, High gain
Collimated lens output power
1.5mW, High gain
Collimated lens output power
1.5mW, High gain
Collimated lens output power
1.5mW, High gain
-0.7
-
0.09
0.19
Collimated lens output power
1.5mW, High gain
Collimated lens output power
1.5mW, High gain
-
-
2
Focal error symmetry
B
FES
-25
-
+25
%
3
Radial error balance
B
RES
-25
-
+25
%
5
FES output amplitude
V
FES
0.3
0.59
0.94
V
4
RF output amplitude
V
RFH
0.65
1.0
1.6
V
7
Main spot balance
MSB
80
(100)
120
%
8
Sub spot balance
SSB
80
(100)
120
%
9
Strain of RF signal shape
RF
h
-
-
300
%
1
Distance between FES=0 and jitter minimum point
2
(a–b) / (a+b)
3
4
Amplitude of V
A
+V
B
+V
C
+V
D
(focal servo ON, radial servo ON)
5
V
B
–V
A
(Focal vibration)
6
Amplitude of (V
C
–V
D
)–k1(V
E
+
G
–V
F
+
H
). k1=(V
C
+V
D
)/(V
E
+
G
+V
F
+
H
)=1
When tracking servo is ON, (V
C
–V
D
)–k1(V
E
+
G
–V
F
+
H
)+
α
should be 0.
7
(V
A
+V
B
) / (V
C
+V
D
)
8
V
C
/V
D
9
V
RFtop
/V
RFave
a–b
2
(a+b)
a (+amplitude of RES)
b (–amplitude of RES)
GND
a (+amplitude of FES)
b (–amplitude of FES)
V
RFtop
V
RFave
V
ref