Polarization
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. Filtration column for purifying Nitrobenzene will be supplied along with the equipment.
Experiment
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.
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
Scope of Supply
Model No: ED-P-05A-BBS
Dimensions : 800 x 600 mm
Material : Stainless Steel
Quantity : 1 no.
Model No: ED-P-05A-KMM
Material : Black anodized Aluminum alloy
Adjustments : Using 80 tpi lead screws
Quantity : 1 no.
Model No: ED-P-05A-BSM
Degrees of freedom : 2 degrees
Material : Black anodized Aluminum alloy
Quantity : 1 no.
Model No: ED-P-05A-PRM
Material : Sheet Polarizer
Rotation : 360 degree
Resolution : 1 degree
Quantity : 2 nos.
Model No: ED-P-05A-DM
Diameter : 40 mm
Material : Black anodized Aluminum alloy
Quantity : 1 no.
Model No: ED-P-05A-PCLM
Material : Borofloat
Diameter : 25 mm
Quantity : 1 no.
Model No: ED-P-05A-KC
Liquid filled : Nitrobenzene
Casing : Teflon
Electrode Cavity : 60 x 3 x 3 mm
Quantity : 1 no.
Model No: ED-P-05A-KCM
Material : Black anodized Aluminum alloy
Quantity : 1 no.
Model No: ED-P-05A-DPSL
Wave length : 532 nm
Output power : 5 mW
Quantity : 1 no.
Model No: ED-P-05A-DPLM
Material : Black anodized Aluminum alloy
Tilting : Lead screw controlled
Quantity : 1 no.
Model No: ED-P-05A-MC
Diameter : 25 mm
Thickness : 6 mm
Material : Borofloat
Coating : Aluminium
Quantity : 1 no.
Model No: ED-P-05A-BS
Dimension : 50 x 50 mm
Thickness : 4 mm
R/T ratio : 50 / 50
Material : N-BK7
Coating : Aluminium
Quantity : 1 no.
Model No: ED-P-05A-SMPS
Input : 230V 50 Hz
Output Voltage : 0 - 4KV
Quantity : 1 no.
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.
Filtration column
Allen Key
Instruction Manual
Established in 1993, Holmarc Opto-Mechatronics Ltd manufactures variety of scientific and engineering instruments for research, industry and education.
ISO 9001:2015 Made in INDIA
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B.7., H.M.T. Industrial Estate
H.M.T. P.O, Kalamassery, Kochi
Kerala, India - 683 503
+91 920-719-7772 / 6 / 1
sales@holmarc.com
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