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NUMERICAL APERTURE , DIVERGENCE ANGLE, ATTENUATION AND BANDWIDTH

Experiment(s):

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

2. Determination of attenuation in optical fibre cable

3. Determination of bandwidth of optical fibre cable



Specifications:

a) X-Y Bed
Bed length: 220 mm
Screen: 35 mm dia
Graduations on screen: 2 mm
Movement: Course and fine
using screw movement

b) 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 &
5mW semiconductor Lasers
Rated Input: 220 V/50 Hz
or 110 V/60 Hz
Mains cord: 2 pin

c) Optical Fibre Cable (OFC):
Length: 1.5m or 3m
Core dia of the cable: 0.5mm

d) Relative light intensity metre
Optical detector: Input from OFC
Rated Input: 220 V/50 Hz
or 110 V/60 Hz
Mains cord: 3 pin

e) Signal generator
Max frequency: 10 MHz
Max amplitude: Suitable for
Laser

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