Hologram Lasers
GH6D307B5A/GH6D307B5B
■ Electro-optical Characteristics
(VCC=5V, Vs=1/ 2V, TC=25˚C)
Parameter
Symbol
Conditions
VRF=0.83V
VRF=0.83V
PH=3.0mW
PH=3.0mW
VRF=0.83V
−
MIN.
-0.5
-25
-25
0.55
0.38
-
TYP.
-
MAX.
+0.5
+25
+25
1.11
0.8
Unit
µm
%
■1
■2
■3
■4
■5
Focal offset
DEF
BFES
BRES
VRF
VFES
Ith
Focal error symmetry
Radial error balance
RF output amplitude
FES output amplitude
Threshold current
Operating current
Operating voltage
Wavelength
-
-
%
0.83
0.58
27
V
V
35
mA
mA
V
Iop
PH=2.85mW
PH=2.85mW
-
36
45
Vop
λp
-
2.2
650
0.1
2.6
PH=2.85mW
640
0.02
660
0.19
nm
mA
GH6D307B5A
Output current
Im
PH=2.85mW, VR=15V
1.9mW
ηd
Differential efficiency
0.35
0.55
0.84
mW/ mA
I(2.85mW)-I(0.95mW)
PH=3.0mW
■6
■7
Main spot balance
Radial spot balance
MSB
RSB
75
75
100
100
125
125
%
%
PH=3.0mW
■1
■2
■3
Distance between FES=0 and jitter minimum point
DPD signal
a–b
(a–b) / (a+b)
2◊(a+b)
a (+amplitude of FES)
a (+amplitude of DPD)
b (–amplitude of FES)
b (–amplitude of DPD)
■4
Amplitude of VA+VB+VE+VF (focal servo ON, radial servo ON)
VA–VB (Focal vibration)
■5
■6
■7
(VA+VB) / (VE+VF) (focal servo ON, radial servo OFF)
VE / VF
Actuator
Collimated lens
Single layer DVD disc
Laser driver
APC circuit
Hologram laser
NA=0.13
NA=0.60
f =19.07mm
f =3.3mm
Measuring System of Hologram Laser
53
SHARP [ SHARP ELECTRIONIC COMPONENTS ]
