ELECTRO-OPTICAL PRODUCTS CORPORATION
	62-40 Forest Avenue, 2nd Floor • Ridgewood, NY 11385, USA • Tel: 718-456-6000 • Fax: 718-456-6050 • www.eopc.com

Acousto-Optic Modulator/Shifter

		MG-40/A6@10.6um DESCRIPTION CAD DRAWINGS

FEATURES AND ADVANTAGES 10.6 um standard design (200 W max) >500 KHz modulation bandwidth 40 MHz frequency shifter Thermal security sensor

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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.

ACOUSTO-OPTIC
Model	MG-40/A6@10.6um
Material	Germanium
Acoustic Velocity (m/s)	5500 (typ)
Optical Wavelength Range (um)	10.6
Optical Transmission (%)	>90 (typ)
Optical Input Polarization	linear //
Aperture (mm × mm)	6 × 10
Diffraction Efficiency (%)	>=75 (typ 80)
Separation Angle (order 0 - order 1) (mrad)	77
Carrier Frequency/Freq. Shift (MHz)	40
Rise Time (ns/mm)             5mm Beam Diameter (nsec)	120   600
Modulation Bandwidth @ -3dB (KHz)	500 (beam dia 5mm)
Maximum Optical Power (W)	200 (at full aperture)
Maximum Optical Power Density (W/mm2)	5 (typ)
ELECTRICAL
Input Impedance (ohms)	50
Maximum RF Power (W)	>50
V.S.W.R.	<1.2/1 (typ)
Associated Driver	MOD-40-50W
PHYSICAL/ENVIRONMENTAL
Connector Type	SMA
Size (mm × mm × mm)	51.6 × 76 × 39.8
Heat Exchange	water cooling (typ 250 ml/mm)   thermal security sensor
Weight (g)	300
Operating Temperature (°C)	10 to 40