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Kerr Effect Apparatus

Model: HO-ED-P-05A

Holmarc's Kerr effect apparatus (Model No: HO-ED-P-05A) is used to determine the Kerr constant of the Liquid (Nitro Benzene C6 H5 NO2 ). In this apparatus, Nitrobenzene is used as the Kerr agent because Nitrobenzene shows a large Kerr constant than other polar liquids. Multiple travel of laser beams through Kerr cell helps to make it compact. This apparatus helps students to acquire knowledge on the fundamental physical property, Kerr Effect.

The Kerr effect, also called the quadratic electro-optic effect (QEO effect), is a change in the refractive index of a material in response to an applied electric field.



Experiment Examples

    To plot a graph and study the birefringence with respect to applied voltage in an electro optic liquid ( Nitrobenzene C6H5NO2 )

By plotting the square of the applied voltage versus the phase shift between normal and extraordinary beam it is to be shown that the relation between the two quantities is approximately linear. From the slope of the straight line the Kerr Constant is to be calculated.



    Determination of half-wave voltage of the cell

The phase-shift between the normal and the extra-ordinary light beam is to be recorded for different voltages applied to the Kerr cell respectively for different electric field strengths. The half wave voltage is to be determined.


Fig: Experimental Arrangement for Kerr Effect Apparatus


In this apparatus, polarized light from a DPSS laser is directed to pass through the space between the electrodes of the Kerr cell. The beam is reflected by a mirror from the other side of the Kerr cell and again it passes through the space between the electrodes. With the help of a beamsplitter and convex lens, the beam is directed to focus on a Si photo diode detector. Embodiments of Kerr effect apparatus provide a phase-shift between the normal and the extra-ordinary light beam and it can be recorded for different voltages applied to the Kerr cell for different electric field strengths.


Graph I
Relative luminous intensity Vs Applied Voltage


Graph II
Phase Shift Vs Voltage2

Features

    Safe and convenient

    Rigid support for easy operation

    Advanced and well proven opto - mechanical designs coupled to high performance electronics

Related Topics

    Kerr effect

    Polarization

    Half Wave Voltage

    Kerr Constant
Scope of Supply


    Optical Breadboard with Support

Model No: ED-P-05A-BBS
Dimensions
:
800mm x 600mm
Material
:
Stainless Steel
Quantity
:
1 no.
Optical Breadboard with Support

    Kinematic Mirror Mount

Model No: ED-P-05A-KMM
Material
:
Black anodized Aluminum alloy
Adjustments
:
Using 80 tpi lead screws
Quantity
:
1 no.
Kinematic Mirror Mount

    Beam Splitter Mount

Model No: ED-P-05A-BSM
Degrees of freedom
:
2 degrees
Material
:
Black anodized Aluminum alloy
Quantity
:
1 no.
Beam Splitter Mount

    Polarizer Rotator with Mount

Model No: ED-P-05A-PRM
Material
:
Sheet Polarizer
Rotation
:
360 degree
Resolution
:
1 degree
Quantity
:
2 nos.
Polarizer Rotator with Mount

    Detector Mount

Model No: ED-P-05A-DM
Diameter
:
40 mm
Material
:
Black anodized Aluminum alloy
Quantity
:
1 no.
Detector Mount

    Plano Convex Lens with Mount

Model No: ED-P-05A-PCLM
Material
:
Borofloat
Diameter
:
25 mm
Quantity
:
1 no.
Plano Convex Lens with Mount

    Kerr Cell

Model No: ED-P-05A-KC
Liquid filled
:
Nitrobenzene
Casing
:
Teflon
Electrode Cavity
:
60 x 3 x 3 mm
Quantity
:
1 no.
Kerr Cell

    Kerr Cell Mount

Model No: ED-P-05A-KCM
Material
:
Black anodized Aluminum alloy
Quantity
:
1 no.
Kerr Cell Mount

    DPSS Laser

Model No: ED-P-05A-DPSL
wavelength
:
532 nm
Output power
:
5 mW
Quantity
:
1 no.
DPSS Laser

    DPSS Laser Mount

Model No: ED-P-05A-DPLM
Material
:
Black anodized Aluminum alloy
Tilting
:
Lead screw controlled
Quantity
:
1 no.
DPSS Laser Mount

    Mirror with Cell

Model No: ED-P-05A-MC
Diameter
:
25 mm
Thickness
:
6 mm
Material
:
Borofloat
Coating
:
Aluminium
Quantity
:
1 no.
Mirror with Cell

    Beam Splitter

Model No: ED-P-05A-BS
Dimension
:
50 mm x 50 mm
Thickness
:
4 mm
R/T ratio
:
50 / 50
Material
:
N-BK7
Coating
:
Aluminium
Quantity
:
1 no.
Beam Splitter

    Switched Mode Power Supply

Model No: ED-P-05A-SMPS
Input
:
230V 50 Hz
Output Voltage
:
0 - 4KV
Quantity
:
1 no.
Switched Mode Power Supply

    Detector Output Measurement Unit

Model No: ED-P-05A-DOMU
Sensor Type
:
Si Photo diode
Sensing Area
:
5.8 x 5.8mm
Display
:
7 segment, 3 ½ digit
Range
:
0 - 199 milli / micro amperes
Quantity
:
1 no.
Detector Output Measurement Unit

    Accessories

Allen Key
User Manual

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