Free-space AO Modulator (Acousto-Optic Modulator)

M250-2x-xx

• 488, 532 and 633nm

• 250MHz drive frequency

• 10ns rise-time

Description

An acousto-optic modulator combining high efficiency and fast switching speed, suitable for use with visible wavelength lasers. This AOM features excellent extinction ratio, superb diffraction efficiency even at maximum modulation rates and minimal optical beam quality distortion.

Options include a choice of mounting and pivot holes, RF connectors and aperture dimensions. Alternative models in lead molybdate or for other wavelengths are available.

Specification

Interaction Material: Tellurium Dioxide

Acoustic Mode: Isotropic, compressional

Wavelength M250-2B-P2: 488nm, < 20mW

M250-2C-ES1: 532nm, < 20mW

M250-2E-O2: 633nm

Anti-Reflection Coating: < 0.2% per surface

Transmission: > 97%

Polarisation: Linear, vertical to base

Frequency: 250MHz

VSWR: < 1.2:1 (50Ω input impedance)

Active Aperture: 0.4mm

Separation Angle: 28 to 37mrad, wavelength dependant

RF Power: < 1.5W

Performance with a 65μm diameter, linearly polarised beam:

Rise-Time / Fall-Time: 10ns

Modulation Bandwidth: 50MHz

Diffracted Beam Ellipticity: < 10%

Diffraction Efficiency: > 85%

Driver Selection

Analogue / Digital Modulation: A312