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You are here:   » Products » Optical Technologies » Components » Optics » Acousto Optics » Polychromatic modulators & Associated RF drivers

Acousto Optics

Polychromatic modulators & Associated RF drivers

Description

Polychromatic modulators & Associated RF drivers

The AOTFnC is a special acousto-optic tunable filter which uses the anisotropic interaction inside a tellurium dioxide crystal to control independently or simultaneously different lines from an incoming UV or VISIBLE laser light(White laser, Ar+, Kr+, HeNe, DPSS, Dye...).Up to 8 distinct lines can be mixed and separately modulated in order togenerate different colorimetric patterns.The specific crystal cut of the AOTF.nC produces good diffraction efficiency (> 90%), narrow resolution (1-2 nm), a low cross-talk between lines, and highextinction ratio.

The large separation angle between 0 and 1st orders, as well as the excellent output chromatic colinearity (<0.2 to <0.3 mrd ) make this AOTF a powerful tool for free space or fiber pigtailedapplications.Its associated thermal stabilisation maintains stable diffraction efficiencyand reduces dramatically beam drift with single mode fiber pigtailing. This is a major advantage for high sensitivity applications.

Download data sheets
AOTFnC- VIS 450-700 nm
AOTFnC-400.650 400-650nm
AOTFnC-400-650 low Res400-650nm low resolution
Driver 1, 4, 8 channelsbased on DDS

AOTFnC* UV VIS VISLow Res Low -VIS IR
Number of channels /Lines 4 8 4 8 4
Acoustic velocity (nom) 675 m/s 650 m/s 650 m/s 660 m/s 650 m/s
Optical wavelength range 350-430 nm 450-700 nm 450-700 nm 400-650 nm 700-1100 nm
Transmission > 80 % -nom 90% > 95 % > 95 % > 90 % > 95%
AO interaction type Birefringent Birefringent Birefringent Birefringent Birefringent
Selected order +1 -1 -1 -1 -1
Input Light polarization Linear parallel Linear orthogonal Linear orthogonal Linear orthogonal Linear parallel
Output Lightpolarization Linear orthogonal Linear parallel Linear parallel Linear parallel Linear orthogonal
Drive frequency range 110-180 MHz 80-153 MHz 80-153 MHz 74-158 MHz  
Active aperture 2 x 2 mm² 3 x 3 mm² 3 x 3 mm² 3 x 3 mm² 2.5 x 2.5 mm²
Spectral resolution(FWHM) nom 1-2 nm nom 1-2 nm nom 4-9 nm nom 1-4 nm nom 3.5-9 nm
Separation angle (orders0-1) > 4.2 degrees > 4,6 degrees > 4,6 degrees > 4 degrees > 4 degrees
Chromatic colinearity(order 1) < 0,2 mrd @351+363 nm < 0,2 mrd < 0,2 mrd < 0,3 mrd < 0.1 mrd
Temperaturestabilization TN TN TN TN TN
AO Efficiency >=90% >= 90 % /line >= 90 % /line >= 90 % /line >= 85% /line
Rise time 980 ns / mm 1010 ns / mm 1010 ns / mm 1000 ns /mm 1010 ns/mm
Max accepted RF power < 1 W all lines < 1 W all lines < 1 W all lines nom 1 W all lines nom 1 W all lines
Electrical impedance 50 Ohms 50 ohms 50 ohms 50 ohms 50 ohms
VSWR < 2/1 < 2/1 < 2/1 < 2/1 < 2/1
Size 70 x 36,6 x 35,8 mm3 70 x 36,6 x 35,8 mm3 70 x 36,6 x 35,8 mm3 70 x 36,6 x 35,8 mm3 70 x 36,6 x 35,8 mm3
Operating temperature 10 to 40 °C 10 to 40 °C 10 to 40 °C 10 to 40 °C 10 to 40 °C

Applications

High sensitivity applications

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