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

		MGAS-80  MGAS-110 DESCRIPTION CAD DRAWINGS

FEATURES AND ADVANTAGES 1.3-1.6 um 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.

ACOUSTO-OPTIC
Model	MGAS-80	MGAS-110
Material	dopped glass
Acoustic Velocity (m/s)	2520 (typ)
Optical Wavelength Range (nm)	broadband 1.3-1.6
Optical Transmission (%)	>95
Optical Input Polarization	random
Aperture (mm × mm)	1 × 2
Diffraction Efficiency (%)	85 @ 1.55 um
Diff. Angle/Input Bragg Angle @ 1.55 um (mrad)	68/34	49/24.6
Carrier Frequency/Freq. Shift (MHz)	80	110
Rise Time (nsec/nm)        -Focused Beam	270   50
Static Extinction Ratio (1st order)	<=2000/1
Max Optical Power Density (W/mm2)	typ 5
ELECTRICAL
Input Impedance (ohms)	50
Maximum RF Power (W)	<0.5
V.S.W.R.	<1.2/1 (typ)
Associated Driver	MOD-80-1W	MOD-110-1W
PHYSICAL/ENVIRONMENTAL
Connector Type	SMA
Size (mm × mm × mm)	50.9 × 22.4 × 15.8
Weight (g)	50
Operating Temperature (°C)	10 to 40