
115
Hologram Lasers
GH6M005A5B
■
Electro-optical Characteristics of Laser Diode (Without Hologram Device) (Design Standard*)
Parameter
Symbol
Parallel
θ//
Perpendicular
θ⊥
Deviation
angle
(T
C
=25
C)
Unit
MAX.
18
45
Emission
characteristics
Misalignment position
Kink
Interference pattern intensity
Parallel
Perpendicular
//
⊥
+2
+3
+80
+15
0.95
Chip thickness
55
μ
m
Conditions
MIN.
9
28
TYP.
-
-
-2
-3
-80
-15
-
-
-
-
-
-
Active layer to chip edge
-
-
X, Y, Z
LKink
α
μ
m
%
-
Po=3mW
■
Electro-optical Characteristics of Photodiode for Signal Detection (Design Standard*)
Parameter
Symbol
Reverse voltage
V
R
D2, D3
(T
C
=25
C)
Unit
V
Response time
tr, tf
ns
Conditions
I
R
=10
μ
A
MIN.
12.5
1.2
1.4
0.4
TYP.
-
-
-
0.5
-
-
10
10
MAX.
50
5
5.8
0.65
120
200
Terminal capacitance
C
t
V
R
=12.5V, f=1MHz
pF
Sensitivity
A/W
V
R
=15V, R
L
=180
D1, D4
S
■
Electro-optical Characteristics of Hologram Laser (Design Standard*)
Parameter
1
RF output amplitude
2
RES output amplitude
3
Focal error signal capture range
(T
C
=25
C)
Unit
μ
A
μ
A
μ
m
MAX.
-
3.5
-
4
Focal error noise
Space between main and sub beam
+7
-
%
μ
m
Conditions
MIN.
5
1
-
TYP.
8.4
2
19
-7
-
-
Disc surface
19.7
1
Amplitude of D1+D2+D3+D4 (focal servo ON, radial servo ON)
2
Amplitude of D1–D4 (focal servo ON)
a
b/a
b
P
CL
=1.1mW
■
Optical Characteristics of Hologram Device (Design Standard*)
Parameter
Transmissive wave aberration
Surface parallelism
Hologram diffraction efficiency (0 : 1)
(T
C
=25
C)
Unit
-
min.
%
MAX.
λ
/8
5
-
Grating diffraction intensity ratio (+1 : -1)
Grating rotation angle
1.1
-
-
Conditions
MIN.
-
-
-
TYP.
-
-
80 : 8
0.9
-
1
to hologram parting line
1.16
Grating diffraction intensity ratio (0 : 1)
9 : 1
10.5 : 1
12 : 1
-
λ
p
=780nm
Half intensity angle
Po=3mW
λ
p
=780nm
D2, D3
D1, D4
3
4
■
Electrical Characteristics of Monitor Photodiode (Design Standard*)
Parameter
Symbol
Dark current
I
D
(T
C
=25
C)
Unit
nA
MAX.
150
-
Terminal capacitance
C
t
pF
Conditions
MIN.
-
-
TYP.
-
9
V
R
=15V
* These parameters are not guaranteed performance, but general specifications of each optical element which makes up a hologram laser.
Please refer to the chapter "Handling Precautions"
Notice
In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP
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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