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聲光調(diào)制器是用來(lái)控制激光束強(qiáng)度的。這可以是簡(jiǎn)單的開(kāi):關(guān)調(diào)制為快速開(kāi)關(guān)或變電平調(diào)制提供比例強(qiáng)度控制。這些模式由RF驅(qū)動(dòng)器類型決定;數(shù)字或模擬調(diào)制分別(或兩者的組合)。射頻驅(qū)動(dòng)頻率通常是固定的，并相應(yīng)地調(diào)整射頻振幅。光的上升和下降時(shí)間由AOM中激光束直徑和晶體聲速?zèng)Q定。對(duì)于高調(diào)制速率，光束需要聚焦在AOM上。從下邊的列表中選擇調(diào)制器的類型。
MODEL AOM-40AF SERIES
ACOUSTO-OPTIC MODULATOR/FREQUENCY SHIFTER
-INTENSITY MODULATION -OPTICAL FREQUENCY SHIFTING -LASER BEAM DEFLECTION -HIGH OPTICAL POWER CAPABILITY -HIGH RELIABILITY -EXCELLENT TEMPERATURE STABILITY | |
SPECIFICATIONS
Acoustic Center Frequency1:40MHz
Optical Frequency Shift Range:±(30 to 50) MHz
Acousto-optic Material:Dense Flint Glass
Acoustic Velocity:3630 m/sec
Modulation Bandwidth (-3db):2.7 MHz (1.0 mm beam diameter)
1.8 MHz (1.5 mm beam diameter)
Optical Rise Time:177 nsec (1.0 mm beam diameter)
265 nsec (1.5 mm beam diameter)
Static Optical Insertion Loss:2 Percent (633nm)
Optical Polarization:Any
RF Input Impedance:50 Ohms (VSWR < 1.25:1 at CF)
RF Connector:BNC
Size (less connector):0.88 H x 2.94 D x 2.46 W inches
22.4 H x 74.7 D x 62.5 W mm
MODEL | AOM-402AF1 | AOM-405AF1 | AOM-402AF3 | AOM-402AF4 |
| Optical Wavelength Range | 440-700 nm | 440-700 nm | 700-1100 nm | 1064 nm |
| Active Aperture Height2 | 2 mm | 5 mm | 2 mm | 2 mm |
| Diffraction Efficiency | 90 Percent | 90 Percent | 90 Percent | 85 Percent |
| Drive Power3 | 1.8 Watts (633 nm) | 4.5 Watts (633 nm) | 3 Watts (780 nm) | 5 Watts |
| Beam Separation | 6.9 mrad (633 nm) | 6.9 mrad (633 nm) | 8.6 mrad (780 nm) | 11.7 mrad |
1 Other center frequencies available.
2 Other active aperture heights available.
3 A complete line of analog, digital, dual frequency, OEM, and laboratory drive electronics are available.
