Detuning the light: Acousto-Optic Modulators
A Guide to Acousto-Optic Modulators
... dex. Light incident on gradients in refractive index is scattered, therefore the light scatters from the acoustic ...the light scat- tered from successive wavefronts interferes ...of light ...
10
Transmission Characteristic Simulation of High Frequency Acousto Optic Modulators
... diffracted light orders, and electric potential versus light ...the light is then split into first ordered diffraction, which implies that the modulator is in the operating ...of light leading ...
13
Different Plastic Materials Based Acousto-optic Modulators (AOMs) Design Considerations for Fast Switching Applications
... incoming light Bragg diffracts of acoustic wave fronts which propagate through a ...incoming light can be achieved by varying the amplitude and frequency of the acoustic waves travelling through the ...A ...
13
State-of-the art of acousto-optic sensing and imaging of turbid media
... The light in the sample arm is modulated as it propagates through the sample, and the reference arm is modulated with two acousto-optic frequency shifters (Bragg cells) or acousto- ...
11
Detuning of Pelton Runners
... 6 MEASUREMENT AND EVALUATION The full lower triangle of the dynamic flexibility matrix in equation (2) is measured by hammer excitation of each bucket. The measurement procedure was optimised to reduce the measuring time ...
10
Acousto-optic modulator
... the acousto-optic modulator. The ability of the acousto-optic modulator to shift the frequency of a laser light beam by a precise and stable amount is crucial to production of a beat ...
5
Acousto-optic method for liquids refractometry
... used light wavelength, the measurement range and the sensitivity to the temperature and ...an acousto-optic technique for measuring the index of refraction of transparent liquid ...an ...
11
Development and characterization of an acousto-optic modulator
... CHAPTER 1 INTRODUCTION 1.1 Introduction In recent years, rapid new developments have been made in optical technology. Developments were made in infrared LED inside TV remotes, miniature semiconductors laser systems ...
35
Lab 9: The Acousto-Optic Effect
... AOMs can also be used to create optical pulses. An optical pulse is produced when a sound wave of finite duration crosses a light beam. When the finite sound wave is on, the radio frequency from the oscillator ...
6
A beamforming system based on the acousto-optic effect
... the acousto-optic effect to localize sound sources in the far ...of light as a sensing element makes this beamforming system immune to spatial ...the acousto-optic beamformer. The ...
7
High frequency acousto optic effects in Bragg reflectors
... for light modulation in optoelectronic devices ...any acousto-optic effects in the DBRs should be ...of light using acousto-optical effects is ...
14
Laser beam modulation by an acousto optic mode locker
... a acousto optic modulator in the laser cavity near the output mirror and opening the modulator at a frequency, f = ...of light and L is the length of the laser cavity. Acousto optic ...
6
Ultrafast acousto-optic imaging with ultrasonic plane waves
... the light beam direction (z-axis) require several thousands averaging pulses for each line [5, 6] so that the US firing rate requires at least few tens of seconds in order to obtain an ...
17
Acousto optic superlattice modulator using Fibre Bragg grating
... The acousto-optic superlattice effect causes an enhancement in reflectivity within a narrow spectral region on both sides of the Bragg ...incident light lies above or below the Bragg ...
5
Holographic reconstruction of sound fields based on the acousto-optic effect
... The acousto-optic effect and tomography The acousto-optic effect describes the interaction between sound and light, when the refractive index of the medium is changed by the presence of ...
11
Experimental set up for characterization of acousto-optic modulator system
... v ABSTRACT Acousto-optic effect can be used in many useful devices such as modulators, switches, filters, frequency shifters and spectrum analyzers. In this study, the modulating effect was generated ...
25
Towards acousto-optic tissue imaging with nanosecond laser pulses
... The equivalence of results after addition or subtraction of speckle patterns initially is counter-intuitive but can be explained. (Fig. 5(b)) The bigger the difference between speckle patterns and keeping the average ...
8
Holographic video display based on guided-wave acousto-optic devices
... guided-wave acousto-optic devices, which give twenty or more times the bandwidth of the tellurium dioxide bulk-wave acousto-optic modulators of our previous ...
7
Dynamic wavefront shaping with an acousto-optic lens for laser scanning microscopy
... Fig. 2. Schematic diagram of experimental setup. From left to right: the pulsed diode laser, was spatially filtered with a pinhole and projected through the two AODs with counter- propagating acoustic waves, which were ...
17
Ultrasound sensing using the acousto optic effect in polymer dispersed liquid crystals
... Recently, acoustic clearing (becoming transparent under the influence of an acoustic field) in polymer dispersed LC (PDLC) has been reported using SAWs at 18.74 MHz 14,15 . PDLCs are thin ( ∼ 20 µm) films in which LC ...
10