Reference: Lab Experiments Journal vol-6, No.4, Page-309 Lab Experiments Journal vol-10, No.1, Page-60

Numerical aperature, divergence angle & attenuation

Experiment(s):

Determination of numerical aperture and divergence angle of Optical Fibre Cable (OFC)

Determination of attenuation in Optical Fibre Cable

Specifications

1 . X-Y Bed

                    Bed Length: 220 mm
Screen: 35 mm dia
Graduations on screen: 2 mm
Movement: Course and fine using screw movement
                  

2 . Laser

                    Type: Semiconductor diode Laser
Wavelength: 625 nm (Red)
Output power: 3 mW
Mount: Cast iron base with  levelling screw

Power Supply
Output: Suitable for 3 mW &  5 mW semiconductor Lasers
Rated Input: 220 V/50 Hz  or 110 V/60 Hz
Mains cord: 2 pin
                  

3 . Optical Fibre Cable (OFC)

                    Length: 1.5 m or 3 m
Core dia of the cable: 0.5 mm
                  

4 . Relative light intensity metre

                    Optical detector: Input from OFC
Rated Input: 220 V/50 Hz  or 110 V/60 Hz
Mains cord: 3 pin
                  

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