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Optics Experiment Apparatus
LEOI-18 Fabry-Perot Interferometer
LEOI-20 Michelson Interferometer
LEOI-21 Michelson & F-P Interferometer
LEOI-22 Precision Interferometer
LEOI-24 Measurement of Speed of Light
LEOI-26 Electronic Speckle Interferometry
LEOI-26A Laser Speckle Photography
LEOI-26B Electronic & Laser Speckle
LEOI-27 Fringe Projection Profilometry
LEOI-30 Diffraction Intensity
LEOI-30A Automatic Diffraction Intensity
LEOI-31 Single-Wire/Single-Slit Diffraction
LEOI-32 Crystal Magneto-Optic Effect
LEOI-33 Crystal Acousto-Optic Effect
LEOI-34 Crystal Electro-Optic Modulation
LEOI-35 Liquid Crystal Electro-Optic Effect
LEOI-36 Silicon Photocell Characterization
LEOI-38 PZT Characterization
LEOI-40 Polarized Light Experiments
LEOI-40A Polarized Light Experiments
LEOI-41 Effect of Optical Activity
LEOI-44 Ellipsometer
LEOI-45 Optical Transfer Function
LEOI-46 Cont. Optical Transfer Function
LEOI-47 Joint Fourier Transform
LEOI-50 Semiconductor Laser Pumping
LEOI-51 He-Ne Laser Mode Analyzer
LEOI-53 He-Ne Laser Serial Experiments
LEOI-58 Semiconductor Laser Experiment
LEOI-63 Blackbody Experiment
LEOI-70 Colorimetry Experiment
 
Schematic of Silicon Photocell
Schematic of electro-optic modulation
S: Source laser P: Polarizer
C: LiNbO3 crystal A: Analyzer
V: Voltage D: Photo receiver
   
Schematic of Silicon Photocell
Schematic of experimental configuration
1. He-Ne laser 6. Photo receiver
2. Glan prism 7. Aperture
3. λ/4 plate 8. LiNbO3 driver
4. LiNbO3 crystal 9. Speaker
5. Analyzer 10. Laser driver
 
      
LEOI-34

Experimental System for Crystal Electro-Optic Modulation

     
Crystal Electro-Optic Modulation Experimental Apparatus
    
 
Features   
Including He-Ne laser with power supply
Precise optical alignment 
Observe and measure electro-optic modulation waveform 
High sensitivity photoreceiver for stable waveform output     
Detailed instruction manual
          
Introduction  

Electro-optic effect is a change in the refractive index of a crystal as induced by an electric field. By using a laser amplitude modulator employing the transverse electro-optic effect of a typical LiNbO3 crystal, students can

 

1. understand electro-optic effect and its applications

2. be able to measure the half-wave voltage and electro-optic coefficient of crystals

3. observe a change in optical properties of crystals due to electro-optic effect

4. observe the interference of focused polarized light as caused by electro-optic effect

5. conduct experimental demonstration of laser communication

 

This experimental system can be used to conduct the following experiments:

 

1. Display electro-optic modulation waveform
2. Observe electro-optic modulation phenomenon
3. Measure half-wave voltage of electro-optic crystal
4. Calculate electro-optic coefficient
5. Demonstrate optical communication using electro-optic modulation technique
                  
Specifications
Power Supply for Electro-Optic Modulation
Output Sine-Wave Modulation Amplitude
0 ~ 300 V (Continuously Adjustable)
DC Offset Voltage Output
0 ~ 600 V (Continuously Adjustable)
Output Frequency
1 kHz
Electro-Optic Crystal (LiNbO3)
Dimension
5×1.7×50 mm
Electrodes
Silver Coating
Flatness
 < λ/8 @633 nm
Transparent Wavelength Range
420 ~ 5200 nm
He-Ne Laser
<1.5 mW @ 632.8 nm
Rotary Polarizer
Minimum Reading Scale: 1°
Photoreceiver
PIN Photocell
      
Part List

Description

Qty

Optical Rail (LEPO-54)
1
Electro-Optic Modulation Controller
1
Photoreceiver
1
He-Ne Laser (LLL-2)
1
Laser Holder (LEPO-20)
1
LiNbO3 Crystal
1
High-Frequency Cable
2
Four-Axis Adjustable Holder (LEPO-25)
2
Rotary Holder (LEPO-52)
3
Polarizer
1
Glan Prism
1
Quarter-Wave Plate
1
Alignment Aperture
1
Active Speaker
1
Ground Glass Screen
1
    
   
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