OAM1059-V3.1
OFF-AXIS FREQUENCY SHIFTER
This low center frequency AO device simultaneously provides dual diffracted output beams, each of which is shifted 10MHz from the input wavelength. With the input beam linearly polarized and at 45deg., the +1 order is upshifted +10MHz, and the –1 order is downshifted –10MHz relative to thefundamental wavelength. The +1 order is horizontally polarized and the –1 order is verticallypolarized. The interaction medium is TeO2 (paratellurite) which in slow shear mode exhibits veryhigh efficiency with modest acoustic energy. This frequency shifter is well suited for laser heads used in laser interferometer position measurement systems with applications in integrated-circuit fabrication, inspection and repair, precision machine tools, mechanical parts inspection and measurement, and mechanical vibration analysis.
SPECIFICATIONS
Interaction Material:
TeO2, off-axis
RF center frequency:
10MHz
Bandwidth:
1MHz
Operating wavelength
632.8nm
Input VSWR:
<2.5:1
Laser polarization:
linear, 45o
Active aperture size:
1.5mm
Diffraction efficiency:
>85% (total)
RF power for Saturation:
<100 milliwatts (nominal)
+1 order separation from 0 order:
9.7 mrad
-1 order separation from 0 order:
9.88 mrad
+1 order polarization extinction ratio:
21 dB (nominal)
-1 order polarization extinction ratio:
18 dB (nominal)
OUTLINE DRAWING
商品属性 [波长] 632.8nm [活跃孔径] 1.5mm [光学材料] TeO2, off-axis [带宽] 1MHz