Schematic of Bragg diffraction
Note: oscilloscope not included
Features
Easy operation
Precise measurement
Stable base
Acousto-optic modulation technique demo
Introduction
Acousto-optic effect is based on the change in the refractive index of a medium due to the presence of sound waves in the medium. This creates a refractive index grating in the material that can be used to diffract light. It provides a powerful means to the control of the frequency, direction, and intensity of a laser beam. Employing acousto-optic effect, acousto-optic devices such as acousto-optic modulator, acousto-optic deflector, and tunable acousto-optic filter have been applied significantly to areas such as laser technology, optical signal processing, and integrated optical communication.
This experimental system can be used to conduct the following experiments:
1. Observe Bragg diffraction and measure Bragg diffraction angle
2. Display acousto-optic modulation waveform
3. Observe acousto-optic deflection phenomenon
4. Measure acousto-optic modulation amplitude
5. Measure parameters such as acousto-optic diffraction efficiency and bandwidth
6. Measure the traveling velocity of ultrasound waves in a medium
7. Simulate optical communication using acousto-optic modulation technique
The instruction manual contains comprehensive materials including experimental configurations, principles and step-by-step instructions. Please click Experiment Theory and Contents to find more information about this apparatus.
Specifications
Description | Specifications |
Ultrasound Signal Frequency | 100 MHz |
He-Ne Laser Output | >2.0 mW @632.8 nm |
Acousto-Optic Crystal | Working Wavelength: 633 nm |
Center Frequency: 100 MHz | |
Effective Aperture: 1 mm | |
Transmissivity: >96% | |
Bragg Angle: 17.4 mrad | |
Polarization of Input Light: Any | |
Internal Modulation Signal | 1 kHz |
Part List
Description | Qty |
Main control unit | 1 |
He-Ne laser with power supply | 1 set |
Laser tube holder | 1 |
Acousto-optic modulator | 1 |
Acousto-optic modulator holder | 1 |
Optical rail | 1 |
General carrier | 1 |
X-translation carrier | 1 |
Transverse measurement holder | 1 |
Photoreceiver | 1 |
Speaker with AC adaptor | 1 set |
Cables | 4 |
Manual | 1 |
Schematic of Bragg diffraction