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Faraday Effect Apparatus

Laser Based

Model: HO-ED-P-04

Holmarc's Faraday Effect Apparatus (Model No: HO-ED-P-04) is designed for the determination of the Verdet constant of a material for a given wavelength of light. With its new and integrated design, this device is easier to setup and operate so that students can understand the principles and theories behind the experiment. Red and green diode lasers (λ = 650nm, 532 nm, respectively) are used for this experiment. This apparatus provides a rod of Schott N-SF57 glass as a sample. A photo detector is placed at the end of the optical rail to measure the intensity as a function of the analyzer angle θ for a full rotation. This system also consists of a power supply for the laser, a magnetic solenoid and a power supply for the solenoid.

Faraday Effect is a magneto optical effect in which the plane of polarized light is rotated as it passes through a medium that is placed in a magnetic field. The amount of rotation is dependent on the amount of sample through which the light passes, strength of the magnetic field and a proportionality constant called Verdet’s Constant.

Optical isolators based on Faraday's effect have important applications in telecommunication. For example to prevent reflected signals on fiber optic cables from producing unwanted signals. Isolators are important when lasers are used because reflected light can cause havoc with the operation of the laser itself.



Experiment Examples

    Determination of the Verdet constant of the material for a given wavelength of light (Magneto Optic Effect)

Faraday Effect is a magneto optical effect in which the plane of polarized light is rotated as it passes through a medium that is placed in a magnetic field. The amount of rotation is dependent on the amount of sample through which the light passes strength of the magnetic field and proportionality constant called the Verdet Constant.


θ  =  V l B


Fig. Verdet’s constant as a function of wavelength

Features

    Compact, stable, reliable and affordable

    Fine tilting beam axis arrangement of kinematic laser mount

    Precision rotary adjustments of polarizers

    Max. magnetic field of 2500 Gauss can be generated


Related Topics

    Electromagnetism

    Electromagnetic field interaction

    Polarization

    Faraday Law

    Verdet constant
Scope of Supply


    Optical Rail

Model No: ED-P-04-OR
Length
:
1000 mm
Material
:
Black anodized Aluminum alloy
Quantity
:
1 no.
Optical Rail

    Kinematic Laser Mount

Model No: ED-P-04-KLM
Material
:
Black anodized Aluminum alloy
Adjustments
:
Using 80 tpi lead screws
AdjustmentRange
:
+/-4 degrees
Quantity
:
1 no.
Kinematic Laser Mount

    Polarizer Rotator with Mount

Model No: ED-P-04-PRM
Material
:
Sheet Polarizer
Rotation
:
360 degree
Resolution
:
1 degree
Quantity
:
1 no.
Polarizer Rotator with Mount

    Polarizer with Precision Rotation

Model No: ED-P-04-PPR
Material
:
Sheet Polarizer
Rotation
:
360 degree
Fine Rotation
:
15 degree
Resolution
:
0.1 degree
Quantity
:
1 no.
Polarizer with Precision Rotation

    Detector Mount with X - Translation

Model No: ED-P-04-DMX
Material
:
Black anodized Aluminum alloy
Travel
:
Micrometer controlled
Resolution
:
0.01 mm
Diameter
:
30 mm
Quantity
:
1 no.
Detector Mount with X - Translation

    Electromagnet with Mount

Model No: ED-P-04-EMM
Winding Material
:
Copper
Number of turns
:
2508
Length of coil
:
150 mm
Quantity
:
1 no.
Electromagnet with Mount

    Glass Rod Specimen

Model No: ED-P-04-GRS
Material
:
SF - 10
Length
:
10 cm
Diameter
:
6 mm
Quantity
:
1 no.
Glass Rod Specimen

    Constant Current Power supply

Model No: ED-P-04-CCPS
Input
:
230V 50Hz
Output Current
:
0 - 4 Amps
Quantity
:
1 no.
Constant Current Power supply

    Diode Laser with Power supply (Red)

Model No: ED-P-04-DLPR
Wave length
:
650 nm
Optical power
:
5 mW
Quantity
:
1 no.
Diode Laser with Power supply (Red)

    Diode Laser with Power supply (Green)

Model No: ED-P-04-DLPG
Wave length
:
532 nm
Optical power
:
5 mW
Quantity
:
1 no.
Diode Laser with Power supply (Green)

    Detector Output Measurement Unit

Model No: ED-P-04-DOMU
Sensor Type
:
Photo Transistor
Display
:
7 segment, 3 ½ digit
Range
:
0 - 199 milli / micro amperes
Quantity
:
1 no.
Detector Output Measurement Unit

    Accessories

User Manual




Faraday Rod

Model No. ED-P-04-GRS
$ 399.00

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