Free-space AO Modulator (Acousto-Optic Modulator)

M111-2J-AV1

• 1520 to 1630nm

• 111MHz drive frequency

• 60ns rise-time

Description

A free-space acousto-optic modulator appropriate for use either intra-cavity or extacavity, for example to Q-Switch or modulate erbium doped fibre lasers.

Broadband anti-reflection coatings, combined with top grade tellurium dioxide, guarantee excellent throughput and beam quality. Special design and high quality manufacturing processes result in superior efficiency with excellent extinction ratio.

Specification

Interaction Material: Tellurium Dioxide

Acoustic Mode: Isotropic, compressional

Wavelength: 1520nm to 1630nm

Transmission: > 97%

Damage Threshold: >10MW/cm2 Pulsed, >50KW/cm2 CW

Polarisation: Any

Frequency: 111MHz

VSWR: < 1·2:1 (50Ω Input Impedance)

Active Aperture: 0.65mm

Separation Angle: 39 to 43mrad, wavelength dependant

RF Power: 3·5W

Operating Temperature: +10 to +60ºC

Storage Temperature: - 15 to +65ºC

Performance with a 400μm diameter, linearly polarised beam:

Rise-Time / Fall-Time: 61ns

Modulation Bandwidth: 8.2MHz

Extinction Ratio: > 40dB

Diffracted Beam Ellipticity: < 20%

Diffraction Efficiency: > 85%

Driver Selection

Digital and Analogue Modulation: A344