1205C-x
Acousto-Optic Modulator
APPLICATIONS
FEATURES
Modulator
Low Drive Power
Low Resolution Deflector
Small Size
Frequency Shifter
Good Temperature Stability
DRIVERS
522C-L or -2 (Digital Modulation)
620C-80 (Variable Frequency & Digital Modulation)
532C-L or -2 (Analog Modulation)
630C-80 (Variable Frequency & Analog Modulation)
MODELS
1205C-1
1mm Active Apertur
1205C-2
2mm Active Aperture
1205C-3
3mm Active Aperture (488-532nm only)
OUTLINE DRAWING
SPECIFICATIONS
Spectral Range:
.442-> 1.5mm*
Standard Operating Wavelengths:
442nm, 488-633nm . (Special A/R coatings to 1.5mm).
Interaction Medium:
Lead Molybdate (PbMo04)
Acoustic Velocity:
3.63mm/ms
Active Aperture:
1mm, 2mm and 3mm
Centre Frequency (CF):
80MHz
RF Bandwidth:
30MHz
Input Impedance:
50W Nominal
VSWR:
<1.5:1 @ 80MHz
DC Contrast Ratio:
>1000:1 min (>2000:1 typical)
PERFORMANCE vs. WAVELENGTH
Wavelength (nm):
442
488
532
633
830*
RF Drive Power, 1205C-1 (W):
<0.3
<0.3
<0.4
<0.5
<0.9
RF Drive Power, 1205C-2 (W):
<0.5
<0.6
<0.7
<1.0
<1.6
RF Drive Power, 1205C-3 (W):
<0.7
<0.9
<1.1
-
-
Bragg angle (mrad):
4.9
5.4
5.9
7.0
9.1
Beam Separation (mrad):
9.7
10.7
11.7
13.9
18.3
Static Insertion Loss (%) :
<10
<5
<3
<3
<3
PERFORMANCE vs. BEAM DIAMETER
Beam Diameter (mm):
2.0
1.0
0.34
0.2
0.14
Rise Time (ns):
360
180
60
35
25
Modulation Bandwidth (MHz) @ MTF = 0.5:
1.0
1.9
5.8
10
15
Deflection Efficiency (% @ CF):
90
85
85
80
75
*Operation at near IR wavelengths with reduced efficiency and modulation bandwidth.
The typical MTF (depth of modulation) curve for the 1205C modulator assuming a 0.14mm beam diameter is shown at the left. For larger beam diameters the abscissa scales linearly. The curve is closely approximated by the function.
M @ exp - (f/fo)²
where: f = modulating frequency in MHz
fo = parameter of modulator related to beam waist
diameter = 18MHz (from experimental data)
The value of M from the curve may be used to the sine wave contrast ratio at a particular modulating according to the relation:
CR = 1+M/1-M
For digital on-off modulation, the contrast ratio will be greater than the value calculated from the above equation
商品属性 [光学材料] PbMo04 [上升/下降时间] 25ns [活跃孔径] 01/02/03mm [操作频率] 15MHz [波长] 442nm, 488-633nm