声光偏转器
Introduction to A-O Deflectors/Scanners
一个声偏转器/扫描器可以改变一个激光束的方向角度,角度的位置呈线形的于声频成正比.因此频率越高,射频的角度越大。
声光偏转器的物理特点是它的光孔径大小,高(H);宽(D)。通常,因为性能和设计的局限性,光的宽度要大于高度。因此,激光的输入和输出需要圆柱体的光学将偶然光从一个环形光转变成一个变短的长方形光,然后经过偏转器再返回到环形光。这个输出的光通常聚焦到发生片状的环形光上又在输出片上形成线形的焦点。
Item | Units | TED-750-500-650 |
Substrate | - | TeO2 |
Wavelength of Operation | nm | 650 |
Frequency Shift | MHz | 750 |
Bandwidth (3 dB) | MHz | 500 |
Access Time | us | 0.2 |
Time Bandwidth Product | - | 100 |
Active Aperture | mm | 0.05 x 1 |
Optical Transmission | % | >80 |
Diffraction Efficiency | % | 20-30 |
Wave Front Distortion | - | l/10 |
Bragg Angle | mrad | 57 |
Separation Angle | mrad | 113 |
Acoustic Velocity | m/s | 4.20E+03 |
Maximum RF Power | W | 1 |
Input Impedance | ohms | 50 |
V.S.W.R | - | 2.1:1 |
Optical Polarization * | - | Linear |
RF Connector | - | SMA |
Item
Units
TED2-412.5-100-532
Substrate
-
TeO2
Wavelength of Operation
nm
532
Center Frequency
MHz
412.5
RF Bandwidth
MHz
100 (Per Request)
Rise Time
ms
2
Time-Bandwidth Product
200
Active Aperture
mm
0.5 x 9.0
Separation Angle
mrad
52 @ 412.5 MHz
Deflection Angle
mrad
13 over 100 MHz
Optical Transmission
%
>98
Diffraction Efficiency *
%
~60
Extinction Ratio
>1000:1
Wave Front Distortion
l/10
Bragg Angle
mrad
26
Acoustic Velocity
m/s
4200
Maximum RF Power**
W
~2
Input Impedance
ohms
50
V.S.W.R
%
0.084027778
Optical Polarization
-
Linear
RF Connector
-
SMA
Item
Units
TED-320-200-633
Substrate
-
TeO2
Wavelength of Operation
nm
633
Center Frequency
MHz
320
Bandwidth (3 dB)
MHz
200
Rise Time
ms
2
Active Aperture
mm
0.5 x 9.0
Separation Angle
mrad
48
Deflection Angle
mrad
30
Optical Transmission
%
>95
Diffraction Efficiency *
%
~60
Extinction Ratio
>1000:1
Wave Front Distortion
l/10
Bragg Angle
mrad
24
Acoustic Velocity
m/s
4200
Maximum RF Power**
W
2
Input Impedance
ohms
50
V.S.W.R
%
0.084027778
Optical Polarization
-
Linear
RF Connector
-
SMA
Item
Units
TED20-100-50-532-AR
Substrate
-
TeO2
Wavelength of Operation
nm
532
Center Frequency
MHz
100
RF Bandwidth
MHz
50
Active Aperture
mm
3 x 14 mm
Access Time
ms
20
Optical Transmission
%
>95
Time-Bandwidth Product*
-
1000
Deflection Angle
mrad
~40
Diffraction Efficiency (peak value)
%
~70
Extinction Ratio
>30 dB
Wave Front Distortion
l/10
Acoustic Velocity
m/s
660
Maximum RF Power
W
~1
Input Impedance
ohms
50
V.S.W.R
%
3.1:1
Optical Polarization
-
Linear
RF Connector
-
SMA
Item
Units
TED3-90-40-1.3-AR
Substrate
-
TeO2
Wavelength of Operation
nm
1300
Center Frequency
MHz
90
Bandwidth (3 dB)
MHz
40
Optical Aperture
mm
1 x 2
Access Time
ms
3
Time-bandwidth Product
-
120
Optical Transmission
%
>90
Diffraction Efficiency (total)
%
~40
Deflection Angle
mrad
88 (~5 deg)
Maximum RF
Watts
3
Acoustic Velocity
m/s
680
Input Impedance
ohms
50
V.S.W.R
%
<3.1:1
Optical Polarization
-
Linear
RF Connector
-
SMA