Introduction to A-O Deflectors/Scanners
一個聲偏轉器/掃描器可以改變一個激光束的方向角度,角度的位置呈線形的于聲頻成正比.因此頻率越高,射頻的角度越大。
聲光偏轉器的物理特點是它的光孔徑大小，高（H）；寬（D）。通常，因為性能和設計的局限性，光的寬度要大于高度。因此，激光的輸入和輸出需要圓柱體的光學將偶然光從一個環形光轉變成一個變短的長方形光，然后經過偏轉器再返回到環形光。這個輸出的光通常聚焦到發生片狀的環形光上又在輸出片上形成線形的焦點。
| 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
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