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Basic Acousto Optic Modulator and Driver. RF. 1st Order Output. 0th Order. Input Laser Beam. Intensity Modulation ? ?. SEP. BRAGG. Modulator Driver. AO Modulator. Key Parameters: Angles. The input Bragg angle is given by: ? ?. This angle is in the plane of deflection and relative to a normal from the input optical surface.
The Model H-401 RF Phase Modulation Capable Acousto-. Optic Modulator represents a significant departure from conventional AO technology, with the ability to use RF phase modulation techniques for performing Acousto-Optic Intensity. Modulation of an Optical Wavefront. The ability to modulate the optical intensity by
Bragg-type acousto-optic modulators, the optical beam is incident at a specific angle . with an As2S3 waveguide film on a LiNbO3 substrate. At a wavelength of 1.15 ?m,. Fig. 10.3 Waveguide acousto-optic Bragg modulator structure [9] While the hybrid circuit approach is obviously an effective means of obtain-.
An acousto-optic modulator (AOM), also called a. Bragg cell, uses the acousto-optic effect to diffract and shift the frequency of light using sound waves. (usually at radio-frequency). They are used in lasers for Q-switching, telecommunications for signal modulation, and in spectroscopy for frequency control. A piezoelectric
A variety of acousto-optical materials are used for Acousto Optic Modulators depending on the properties and figure of merit for most common materials used for the NEOS Technologies acousto optical modulators. For the visible region and near infrared region, the most .. A D/A circuit converts the digital signal to.
The Acousto-Optic Modulator is based on the elasto-optic effect, in which a material strain causes a change in the refraction index of the material. When the strain is generated by an acoustic compression or rarefaction, an AOM is formed. Because the acoustic signal is sinusoidal, a moving refractive index grating is formed
Acousto-Optic application note – modulator model 3000 series. This data sheet is issued to provide outline information only and Crystal Technology, Inc. reserves the right to alter without notice the specifications, design, price or conditions of supply of this product. DO-16-A 01/06. Crystal Technology's (CTI) acoustic-optic.
The frequency of the diffracted beam is shifted up or down by the acoustic frequency, depending on the input beam angle. • If the laser is angled (slightly) in the opposite direction of the acoustic wave, its frequency increases. • If the laser is angled in same direction as the acoustic wave, its frequency decreases.
The refractive index of an optical medium is altered by the presence of sound. Sound therefore modifies the effect of the medium on light; i.e., sound can contro2 light (Fig. 20.0-l). Many useful devices make use of this acousto-optic effect; these include optical modulators, switches, deflectors, filters, isolators, frequency
A Guide to Acousto-Optic Modulators. D. J. McCarron. December 7, 2007. 1 Introduction. Acousto-optic modulators (AOMs) are useful devices which allow the fre- quency, intensity and direction of a laser beam to be modulated. Within these devices incoming light Bragg diffracts off acoustic wavefronts which propagate
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