ELECTRO-OPTICAL PRODUCTS CORPORATION
	88-65 76th Avenue • Glendale, NY 11385, USA • Tel: 718-997-8100 • Fax: 718-997-8102 • www.eopc.com

Acousto-Optic X-Y Scanning System

		DTSXY-100  DTSXY-250  DTSXY-400 DESCRIPTION CAD DRAWINGS

FEATURES AND ADVANTAGES Two axis laser beam deflection High resolution Scanning mode/random access mode Wide spectral range/monochromatic mode Circular aperture up to 6.7 mm dia Low drive RF power Optical transmission at least 95% Up to 50 MHz deflection frequecy Up to 48 mrad deflection angle

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Two deflectors can be used in series and at right angles, to provide full two-dimensional (X,Y) scanning. The acousto-optic deflector is used to scan a laser beam over a range of angles, or to control the output angle of a laser beam with great accuracy. A Bragg configuration produces a single first order output beam, whose intensity is directly linked to the power of the RF control signal, and whose angle is directly linked to the RF frequency. By varying the frequency of the RF control signal, the angle of the output laser beam is adjusted.

An acousto-optic deflector is defined by the following parameters:

A deflector is used to form a high number of "pixels" to scan laser beams. Single dimension Acousto-Optic Deflectors are also available.

Acousto-optic deflectors require a variable frequency source able to cover a frequency range within 10MHz and 2GHz. EOPC offers several stock acousto-optic deflector drivers to choose from, as well as custom models.

Applications include generating graphics, compensation of tracking errors in rotating polygon mirrors, optical tweezers (to trap atoms or molecules), two and three dimensional measurements and cavity dumping (high power laser pulses switched out of a laser cavity).

ACOUSTO-OPTIC  Deflector Model   DTXY-100   DTXY-250   DTXY-400   Material   TeO2   Acoustic Velocity (m/s)   620-670   Optical Wavelength Range1 (nm)   350-1600   Optical Transmission (%)   >95   Optical Input Polarization   linear // - linear | (1st order)    Aperture (mm)   1.7   4.2   6.7   Diffraction Efficiency (%)   >=50   Deflection Angle Range (mrad)             @ 532 nm            @ 1064 nm  41 × 41   49 × 49   AO Bandwidth (MHz)             @ 532 nm            @ 1064 nm  50 × 50   30 × 30   Random Access Time @ max beam dia. (usec)   2.6   6.5   10.3   Static Resolution   (Gaussian diffraction limited beam @ 532 nm)   100 × 100   250 × 250   400 × 400   Max Optical Power Density (W/mm2)   typ 5    ELECTRICAL  Input Impedance (ohms)   50   Maximum RF Power (W)   <2   V.S.W.R.   <2/1   Associated Driver   DRF, PLL, DDS + AMP    PHYSICAL/ENVIRONMENTAL  Connector Type   SMA   Size (mm × mm × mm)   64.6 × 63.1 × 63.6    Weight (g)   120   Operating Temperature (°C)   10 to 40  1Monochromatic operation/single line in the wavelength range