ELECTRO-OPTICAL PRODUCTS CORPORATION
	62-40 Forest Avenue, 2nd Floor • Ridgewood, NY 11385, USA • Tel: 718-997-6000 • Fax: 718-997-81050 • www.eopc.com

Acousto-Optic Modulator/Shifter

		MT-350/A0.2-VIS DESCRIPTION CAD DRAWINGS

FEATURES AND ADVANTAGES Wide spectral range Low RF drive power Low resolution deflector or frequency shifter

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Acousto-optic modulators are used to vary and control laser beam intensity. A Bragg configuration gives a single first order output beam, whose intensity is directly linked to the power of RF control signal. The rise time of the modulator is simply deduced by the necessary time for the acoustic wave to travel through the laser beam. For highest speeds the laser beam will be focused down, forming a beam waist as it passes through the modulator.

EOPC offers a wide range of modulators with associated drivers. The set is optimized to offer the best performances (rise time, extinction ratio, etc.). The RF driver features all the necessary components to drive the modulator with analog or digital input control. Both a low cost OEM version and complete laboratory version (boxed) are offered. The laboratory version is a versatile turn-key tool for fast set-up and allows the user to have amplitude modulation capabilities from front panel (DC modulation) or from an external signal.

Up to 12 distinct lines can be mixed and separately modulated using a Polychromatic Modulation System.

Applications for acousto-optic modulators include laser printing, video disk recording, laser projection systems.

Beam Diameter (1/e2)	Rise Time	1st Order Ellipticity		Diffraction Efficiency
		@488 nm	@633 nm	@488 nm	@633 nm
30 um	5 nsec	80%	75%	>=95%	>=95%
Separation Angle		20.3 mrad	26.4 mrad
Max Optical Power Density (typ)		typ 5 W/mm2

ACOUSTO-OPTIC
Model	MT-350/A0.2-VIS
Material	TeO2
Acoustic Velocity (m/s)	4200 (typ)
Optical Wavelength Range (nm)	broadband 450-700
Optical Transmission (%)	>95
Optical Input Polarization	linear
Aperture (mm × mm)	0.2 × 2
Carrier Frequency/Freq. Shift (MHz)	350
Modulation Bandwidth @ -3dB (MHz)	>100
Static Extinction Ratio (1st order)	>=1000/1
ELECTRICAL
Input Impedance (ohms)	50
Maximum RF Power (W)	<=2
V.S.W.R.	<1.2/1 (typ)
Associated Driver	MOD-350-2W
PHYSICAL/ENVIRONMENTAL
Connector Type	SMA
Size (mm × mm × mm)	47 × 33 × 17.8
Weight (g)	50
Operating Temperature (°C)	10 to 40